matrix!your sound is very thin at the moment,time to crank up the compressor!!

> Message: 1
>  Date: Sat, 31 Jul 2004 09:53:37 -0000
>  From: "matrix1075fm" <matrix1075fm@...>
> Subject: Matrix 107.5 FM
>
> Hello,
> after some testing we are finally on air permanently.
> We are currently running a 130 hr playlist on repeat with a station ID
> thrown in at various intervals.
> The format is similar to Radio Chomsky, but there is music too.
> We provide space for local musicians and DJs between 8 and 10 pm every
> day and can expand the slot if required.
> It is early days yet, but the Matrix could be filling a gap.
> We hope that the station will grow into a veritable information and
> local culture platform.
> We are using a very stable low power Veronica transmitter that until
> recently covered most of Wellington City.
> Right now we are encountering some problems.
> It seems that some transmitter close to us jams our signal.
> We are in Wellington near the Basin Reserve.
> Tune in and check us out.
>
>
>
>
>
> ________________________________________________________________
> ________
> ______________________________________________________________
> __________
>
>
> -------------------------------------------------------- -
> LPFM Website: http://au.groups.yahoo.com/group/LPFM_Radio
> ------------------------------------------------------------------------
> Yahoo! Groups Links
>
>
>
>
> ----------------------------------------------------------------------
> --
>
>
>

Hello,
after some testing we are finally on air permanently.
We are currently running a 130 hr playlist on repeat with a station ID
thrown in at various intervals.
The format is similar to Radio Chomsky, but there is music too.
We provide space for local musicians and DJs between 8 and 10 pm every day and
can expand the slot if required.
It is early days yet, but the Matrix could be filling a gap.
We hope that the station will grow into a veritable information and local
culture platform.
We are using a very stable low power Veronica transmitter that until recently
covered most of Wellington City.
Right now we are encountering some problems.
It seems that some transmitter close to us jams our signal.
We are in Wellington near the Basin Reserve.
Tune in and check us out.

----- Original Message -----

From: Richard Phelps

To: LPFM_Radio@...

Sent: Friday, July 30, 2004 4:40 PM

Subject: Re: [LPFM] Ross!

Hmmm, I checked the RSM website and it seems that this licensed
frequency has just been renewed as 97.3, and changed on the 28th of
June.
It's also had a power uppage to 32dbW (1,584.89W) and yes, TRN have
possession.

Cheers.
R.



--- In LPFM_Radio@..., "Ross Levis" <ross@s...> wrote:
> Blowhole are still using 97.4.  I thought someone else won that
frequency, not TRN.  Perhaps it was TRN under an alias.
>
> LPFM Freqs in use:
>
> 88.1  Blowhole (STL)
> 88.2  Tourist FM
> 88.4  Soul FM (Mt Maunganui)
> 106.7 Unidentified
> 107.0 Soul FM (Tauranga)
> 107.3 George
>
> Still a little bit of room and no interference issues here at all,
but how long will it last, is the question.
>
> Ross.
>   ----- Original Message -----
>   From: Richard Phelps
>   To: LPFM_Radio@...
>   Sent: Tuesday, July 27, 2004 10:26 AM
>   Subject: [LPFM] Ross!
>
>
>   Whats the status in Tauranga regarding LPFM stations. I know that
>   George are new neighbours there - who else broadcasts there on
LPFM?
>
>   I also noted that TRN picked up 97.4 in the last auction too.
What of
>   Blowhole? Anything?
>
>   R.

Hmmm, I checked the RSM website and it seems that this licensed
frequency has just been renewed as 97.3, and changed on the 28th of
June.
It's also had a power uppage to 32dbW (1,584.89W) and yes, TRN have
possession.

Cheers.
R.



--- In LPFM_Radio@..., "Ross Levis" <ross@s...> wrote:
> Blowhole are still using 97.4.  I thought someone else won that
frequency, not TRN.  Perhaps it was TRN under an alias.
>
> LPFM Freqs in use:
>
> 88.1  Blowhole (STL)
> 88.2  Tourist FM
> 88.4  Soul FM (Mt Maunganui)
> 106.7 Unidentified
> 107.0 Soul FM (Tauranga)
> 107.3 George
>
> Still a little bit of room and no interference issues here at all,
but how long will it last, is the question.
>
> Ross.
>   ----- Original Message -----
>   From: Richard Phelps
>   To: LPFM_Radio@...
>   Sent: Tuesday, July 27, 2004 10:26 AM
>   Subject: [LPFM] Ross!
>
>
>   Whats the status in Tauranga regarding LPFM stations. I know that
>   George are new neighbours there - who else broadcasts there on
LPFM?
>
>   I also noted that TRN picked up 97.4 in the last auction too.
What of
>   Blowhole? Anything?
>
>   R.
>
>
>
>   ---------------------------------------------------------
>   LPFM Website: http://au.groups.yahoo.com/group/LPFM_Radio
>
>
>
> --------------------------------------------------------------------
----------
>   Yahoo! Groups Links
>
>     a.. To visit your group on the web, go to:
>     http://au.groups.yahoo.com/group/LPFM_Radio/
>
>     b.. To unsubscribe from this group, send an email to:
>     LPFM_Radio-unsubscribe@...
>
>     c.. Your use of Yahoo! Groups is subject to the Yahoo! Terms of
Service.

Michael and Ross wrote:

> 50mW AM would work and shouldn't propogate and use 1611-1701 kHz.
> Michael

I find am useless without going outside and away from the computers, and there
are so many images of various stations. On the car, you cannot find a freq where
there is nothing on it at all except up around 1700

Hey anyone know who is on 93.1 Wellington. I assume it's TRN. It's
just playing solid gold style stuff.

Hey anyone know who is on 93.1 Wellington. I assume it's TRN. It's
just playing solid gold style stuff.

----- Original Message -----

From: Richard Phelps

To: LPFM_Radio@...

Sent: Tuesday, July 27, 2004 10:26 AM

Subject: [LPFM] Ross!

Whats the status in Tauranga regarding LPFM stations. I know that
George are new neighbours there - who else broadcasts there on LPFM?

I also noted that TRN picked up 97.4 in the last auction too. What of
Blowhole? Anything?

R.



---------------------------------------------------------
LPFM Website: http://au.groups.yahoo.com/group/LPFM_Radio

That has potential, as long as the requested frequencies are within the
band plan.

That has potential, as long as the requested frequencies are within the
band plan.

What will come up as an issue for AM is the night time propagation and
the protection built in to existing licence holders.

Jochen

>>> laoagst@... 27/07/04 >>>
hi there,
how about the AM option, can you see that happening at
all?

mals

--- Jochen Siegenthaler
<Jochen.Siegenthaler@...> wrote:
> Forget it - it'll never happen.
>
> You're asking New Zealand to step away from the
> agreed international
> planning of FM frequencies.
>
> We're a signatory to the ITU, we have agreed to
> comply with their
> planning.
>
> To do anything different requires a long involved
> process of going thru
> the ITU to achieve an exception.
>
> I think (my personal view) to achieve any change in
> LPFM you need to
> focus on what is achievable within the current FM
> band planning rules
> for this country, and work within those rules.
>
> Jochen
>
> >>> ross@... 27/07/04 >>>
> The only good option in my opinion is utilizing the
> 87Mhz area if it is
> now infact not utilized by other services.  May as
> well go to 87.5 while
> they are at it..  And if the spectrum is free, then
> the rest of the
> country may as well benefit as well.  This would
> still mean Auckland has
> less LPFM frequencies than the rest of the country
> but can't do much
> about that.  No point in restricting the rest of the
> country just
> because Auckland is.
>
> Cheers,
> Ross.
>   ----- Original Message -----
>   From: LPFM_Radio@...
>   To: LPFM_Radio@...
>   Sent: Tuesday, July 27, 2004 1:31 AM
>   Subject: [LPFM] New poll for LPFM_Radio
>
>
>
>   Enter your vote today!  A new poll has been
> created for the
>   LPFM_Radio group:
>
>   If Auckland LPFM users were granted
>   three more frequencies to equal the
>   available low-power spectrum with other
>   areas in NZ, where would you prefer the
>   frequencies?
>
>     o 87.8, 87.9 + 88.0
>     o 106.4, 106.5, 106.6
>     o 106.5, 106.6, 107.8
>     o 106.6, 107.8, 107.9
>     o 107.8, 107.9, 108.0
>     o It's a bad idea to give Aucklanders more
> frequencies
>     o They should be happy with what they've got.
>     o Mai FM should be moved off 88.6, so 88.5, 88.6
> + 88.7 is
> consistent throughout NZ.
>     o I'd like to see AM explored for further LP
> broadcasting instead
> of FM
>
>
>   To vote, please visit the following web page:
>
>   http://au.groups.yahoo.com/group/LPFM_Radio/polls
>
>   Note: Please do not reply to this message. Poll
> votes are
>   not collected via email. To vote, you must go to
> the Yahoo! Groups
>   web site listed above.
>
>   Thanks!
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> CAUTION : This email message and attachments are
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> may contain legally privileged information or
> copyright material. If you
> have received this email in error, please advise the
> sender immediately
> by return email and then delete both messages and
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> If you are not the intended recipient you are
> notified that any use,
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> or omitted to be
> taken in reliance of this message or attachments is
> prohibited. We do
> not accept liability in connection with computer
> virus, data corruption,
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> Views expressed in this email may not be those of
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> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> <<<< GWAVASIG >>>>
>




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---------------------------------------------------------
LPFM Website: http://au.groups.yahoo.com/group/LPFM_Radio
Yahoo! Groups Links

Now now !!

>>> alnairgrus@... 27/07/04 >>>
Suppose if it was compulsory RDS you would be for it.

Michael

Jochen Siegenthaler <Jochen.Siegenthaler@...> wrote:
Forget it - it'll never happen.

You're asking New Zealand to step away from the agreed international
planning of FM frequencies.



Michael&Ross

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<<<< GWAVASIG >>>>

hi there,
how about the AM option, can you see that happening at
all?

mals

--- Jochen Siegenthaler
<Jochen.Siegenthaler@...> wrote:
> Forget it - it'll never happen.
>
> You're asking New Zealand to step away from the
> agreed international
> planning of FM frequencies.
>
> We're a signatory to the ITU, we have agreed to
> comply with their
> planning.
>
> To do anything different requires a long involved
> process of going thru
> the ITU to achieve an exception.
>
> I think (my personal view) to achieve any change in
> LPFM you need to
> focus on what is achievable within the current FM
> band planning rules
> for this country, and work within those rules.
>
> Jochen
>
> >>> ross@... 27/07/04 >>>
> The only good option in my opinion is utilizing the
> 87Mhz area if it is
> now infact not utilized by other services.  May as
> well go to 87.5 while
> they are at it..  And if the spectrum is free, then
> the rest of the
> country may as well benefit as well.  This would
> still mean Auckland has
> less LPFM frequencies than the rest of the country
> but can't do much
> about that.  No point in restricting the rest of the
> country just
> because Auckland is.
>
> Cheers,
> Ross.
>   ----- Original Message -----
>   From: LPFM_Radio@...
>   To: LPFM_Radio@...
>   Sent: Tuesday, July 27, 2004 1:31 AM
>   Subject: [LPFM] New poll for LPFM_Radio
>
>
>
>   Enter your vote today!  A new poll has been
> created for the
>   LPFM_Radio group:
>
>   If Auckland LPFM users were granted
>   three more frequencies to equal the
>   available low-power spectrum with other
>   areas in NZ, where would you prefer the
>   frequencies?
>
>     o 87.8, 87.9 + 88.0
>     o 106.4, 106.5, 106.6
>     o 106.5, 106.6, 107.8
>     o 106.6, 107.8, 107.9
>     o 107.8, 107.9, 108.0
>     o It's a bad idea to give Aucklanders more
> frequencies
>     o They should be happy with what they've got.
>     o Mai FM should be moved off 88.6, so 88.5, 88.6
> + 88.7 is
> consistent throughout NZ.
>     o I'd like to see AM explored for further LP
> broadcasting instead
> of FM
>
>
>   To vote, please visit the following web page:
>
>   http://au.groups.yahoo.com/group/LPFM_Radio/polls
>
>   Note: Please do not reply to this message. Poll
> votes are
>   not collected via email. To vote, you must go to
> the Yahoo! Groups
>   web site listed above.
>
>   Thanks!
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> CAUTION : This email message and attachments are
> confidential and
> may contain legally privileged information or
> copyright material. If you
> have received this email in error, please advise the
> sender immediately
> by return email and then delete both messages and
> any attachments.
> If you are not the intended recipient you are
> notified that any use,
> distribution, amendment, copying or any action taken
> or omitted to be
> taken in reliance of this message or attachments is
> prohibited. We do
> not accept liability in connection with computer
> virus, data corruption,
> delay, interruption, unauthorised access or
> unauthorised amendment.
> Views expressed in this email may not be those of
> originating organisation
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> <<<< GWAVASIG >>>>
>




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Forget it - it'll never happen.

You're asking New Zealand to step away from the agreed international
planning of FM frequencies.

I've placed my vote - there is a viable solution amongst the options
listed - took me 2 min to figure it out :-)

Jochen

>>> richard.phelps@... 27/07/04 >>>
I know mate, but based on your personal view you still have 3 or 4
choices remaining.. hehe
-or it in your best interest not to have an opinion on this?
It's just a poll.

R.

--- In LPFM_Radio@..., "Jochen Siegenthaler"
<Jochen.Siegenthaler@b...> wrote:
> Forget it - it'll never happen.
>
> You're asking New Zealand to step away from the agreed international
> planning of FM frequencies.
>
> We're a signatory to the ITU, we have agreed to comply with their
> planning.
>
> To do anything different requires a long involved process of going
thru
> the ITU to achieve an exception.
>
> I think (my personal view) to achieve any change in LPFM you need to
> focus on what is achievable within the current FM band planning
rules
> for this country, and work within those rules.
>
> Jochen



---------------------------------------------------------
LPFM Website: http://au.groups.yahoo.com/group/LPFM_Radio
Yahoo! Groups Links





~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
CAUTION : This email message and attachments are confidential and
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have received this email in error, please advise the sender immediately
by return email and then delete both messages and any attachments.
If you are not the intended recipient you are notified that any use,
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taken in reliance of this message or attachments is prohibited. We do
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delay, interruption, unauthorised access or unauthorised amendment.
Views expressed in this email may not be those of originating organisation
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

<<<< GWAVASIG >>>>

Whats the status in Tauranga regarding LPFM stations. I know that
George are new neighbours there - who else broadcasts there on LPFM?

I also noted that TRN picked up 97.4 in the last auction too. What of
Blowhole? Anything?

R.

I know mate, but based on your personal view you still have 3 or 4
choices remaining.. hehe
-or it in your best interest not to have an opinion on this?
It's just a poll.

R.

--- In LPFM_Radio@..., "Jochen Siegenthaler"
<Jochen.Siegenthaler@b...> wrote:
> Forget it - it'll never happen.
>
> You're asking New Zealand to step away from the agreed international
> planning of FM frequencies.
>
> We're a signatory to the ITU, we have agreed to comply with their
> planning.
>
> To do anything different requires a long involved process of going thru
> the ITU to achieve an exception.
>
> I think (my personal view) to achieve any change in LPFM you need to
> focus on what is achievable within the current FM band planning rules
> for this country, and work within those rules.
>
> Jochen

Forget it - it'll never happen.

You're asking New Zealand to step away from the agreed international
planning of FM frequencies.

We're a signatory to the ITU, we have agreed to comply with their
planning.

To do anything different requires a long involved process of going thru
the ITU to achieve an exception.

I think (my personal view) to achieve any change in LPFM you need to
focus on what is achievable within the current FM band planning rules
for this country, and work within those rules.

Jochen

>>> ross@... 27/07/04 >>>
The only good option in my opinion is utilizing the 87Mhz area if it is
now infact not utilized by other services.  May as well go to 87.5 while
they are at it..  And if the spectrum is free, then the rest of the
country may as well benefit as well.  This would still mean Auckland has
less LPFM frequencies than the rest of the country but can't do much
about that.  No point in restricting the rest of the country just
because Auckland is.

Cheers,
Ross.
   ----- Original Message -----
   From: LPFM_Radio@...
   To: LPFM_Radio@...
   Sent: Tuesday, July 27, 2004 1:31 AM
   Subject: [LPFM] New poll for LPFM_Radio



   Enter your vote today!  A new poll has been created for the
   LPFM_Radio group:

   If Auckland LPFM users were granted
   three more frequencies to equal the
   available low-power spectrum with other
   areas in NZ, where would you prefer the
   frequencies?

     o 87.8, 87.9 + 88.0
     o 106.4, 106.5, 106.6
     o 106.5, 106.6, 107.8
     o 106.6, 107.8, 107.9
     o 107.8, 107.9, 108.0
     o It's a bad idea to give Aucklanders more frequencies
     o They should be happy with what they've got.
     o Mai FM should be moved off 88.6, so 88.5, 88.6 + 88.7 is
consistent throughout NZ.
     o I'd like to see AM explored for further LP broadcasting instead
of FM


   To vote, please visit the following web page:

   http://au.groups.yahoo.com/group/LPFM_Radio/polls

   Note: Please do not reply to this message. Poll votes are
   not collected via email. To vote, you must go to the Yahoo! Groups
   web site listed above.

   Thanks!
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
CAUTION : This email message and attachments are confidential and
may contain legally privileged information or copyright material. If you
have received this email in error, please advise the sender immediately
by return email and then delete both messages and any attachments.
If you are not the intended recipient you are notified that any use,
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taken in reliance of this message or attachments is prohibited. We do
not accept liability in connection with computer virus, data corruption,
delay, interruption, unauthorised access or unauthorised amendment.
Views expressed in this email may not be those of originating organisation
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

<<<< GWAVASIG >>>>

----- Original Message -----

From: LPFM_Radio@...

To: LPFM_Radio@...

Sent: Tuesday, July 27, 2004 1:31 AM

Subject: [LPFM] New poll for LPFM_Radio

Enter your vote today!  A new poll has been created for the
LPFM_Radio group:

If Auckland LPFM users were granted
three more frequencies to equal the
available low-power spectrum with other
areas in NZ, where would you prefer the
frequencies?

  o 87.8, 87.9 + 88.0
  o 106.4, 106.5, 106.6
  o 106.5, 106.6, 107.8
  o 106.6, 107.8, 107.9
  o 107.8, 107.9, 108.0
  o It's a bad idea to give Aucklanders more frequencies
  o They should be happy with what they've got.
  o Mai FM should be moved off 88.6, so 88.5, 88.6 + 88.7 is consistent throughout NZ.
  o I'd like to see AM explored for further LP broadcasting instead of FM


To vote, please visit the following web page:

http://au.groups.yahoo.com/group/LPFM_Radio/polls

Note: Please do not reply to this message. Poll votes are
not collected via email. To vote, you must go to the Yahoo! Groups
web site listed above.

Thanks!

Enter your vote today!  A new poll has been created for the
LPFM_Radio group:

If Auckland LPFM users were granted
three more frequencies to equal the
available low-power spectrum with other
areas in NZ, where would you prefer the
frequencies?

   o 87.8, 87.9 + 88.0
   o 106.4, 106.5, 106.6
   o 106.5, 106.6, 107.8
   o 106.6, 107.8, 107.9
   o 107.8, 107.9, 108.0
   o It's a bad idea to give Aucklanders more frequencies
   o They should be happy with what they've got.
   o Mai FM should be moved off 88.6, so 88.5, 88.6 + 88.7 is consistent
throughout NZ.
   o I'd like to see AM explored for further LP broadcasting instead of FM


To vote, please visit the following web page:

http://au.groups.yahoo.com/group/LPFM_Radio/polls

Note: Please do not reply to this message. Poll votes are
not collected via email. To vote, you must go to the Yahoo! Groups
web site listed above.

Thanks!

C'mon broadcasters..

Lets get some studio shots up here - even if you just have a PC
plugged into an amp!

Maybe some shots from a recent promo or just someone on air!

What about logos? If you can, upload your logo - say 100 pixels wide
(the same as the Yahoo logo above).

I've made a couple of directories in the 'photos' section. Lets see
what we have out there to fill our 30Mb of photo space :)

Rich.

Well Done.
You win first prize of lunch for 1 with Radio Pegasus.

<g>

Jochen

>>> radiopegasus@... 26/07/04 >>>

Buy...?



>From: "Jochen Siegenthaler" <Jochen.Siegenthaler@...>
>Reply-To: LPFM_Radio@...
>To: <akwccr@...>, <LPFM_Radio@...>
>Subject: [LPFM] Re: How close can two different stations be?
>Date: Mon, 26 Jul 2004 09:31:32 +1200
>
>The document pretty much sums it up.
>
>Note the described duplexer is 4 x cavity filters - you only need one

>per FM transmitter if you are just transmitting one frequency, and not

>interested in receiving anything.
>
>So there you go - make your own as described, or pay $700 to have one

>made for you.
>
>I know what I'd do :-)
>
>J
>
> >>> akwccr@... 25/07/04 >>>
>--- In LPFM_Radio@..., "Jochen Siegenthaler"
><Jochen.Siegenthaler@b...> wrote:
> > Thats an easy one - No.
> > Hunt up some ham radio books - they tend to have that sort of
>stuff in
> > them
> > Jochen
> >
> > >>> radiopegasus@h... 22/07/04 >>>
> > You have indeed opened up a minefield..lets open it further..
> > Do you have drawings , specs etc to build a cavity filter please
> > Rgards Dave
>
>---SNIP---
>
>I have found a document at
>http://www.utm.edu/~leeb/duplexer.pdf, "duplexer.pdf", which
>describes cavity filters rather well, and have uploaded it to the
>Files on this site. Gives a pretty good perspective on the
>difficulties of brewing your own (not that it can't be done), and
>also why they cost so much.
>
>BTW: hope I haven't infringed copyright by posting this document.
>
>-P.
>
>
>
>
>---------------------------------------------------------
>LPFM Website: http://au.groups.yahoo.com/group/LPFM_Radio
>Yahoo! Groups Links
>
>
>
>
>
>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>CAUTION : This email message and attachments are confidential and
>may contain legally privileged information or copyright material. If
you
>have received this email in error, please advise the sender
immediately
>by return email and then delete both messages and any attachments.
>If you are not the intended recipient you are notified that any use,
>distribution, amendment, copying or any action taken or omitted to be

>taken in reliance of this message or attachments is prohibited. We do

>not accept liability in connection with computer virus, data
corruption,
>delay, interruption, unauthorised access or unauthorised amendment.
>Views expressed in this email may not be those of originating
organisation
>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
><<<< GWAVASIG >>>>

Check out news, entertainment and more on the Xtra Broadband Channel

---------------------------------------------------------
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Yahoo! Groups Links
To visit your group on the web, go to:
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   To unsubscribe from this group, send an email to:
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The document pretty much sums it up.

Note the described duplexer is 4 x cavity filters - you only need one
per FM transmitter if you are just transmitting one frequency, and not
interested in receiving anything.

So there you go - make your own as described, or pay $700 to have one
made for you.

I know what I'd do :-)

J

>>> akwccr@... 25/07/04 >>>
--- In LPFM_Radio@..., "Jochen Siegenthaler"
<Jochen.Siegenthaler@b...> wrote:
> Thats an easy one - No.
> Hunt up some ham radio books - they tend to have that sort of
stuff in
> them
> Jochen
>
> >>> radiopegasus@h... 22/07/04 >>>
> You have indeed opened up a minefield..lets open it further..
> Do you have drawings , specs etc to build a cavity filter please
> Rgards Dave

---SNIP---

I have found a document at
http://www.utm.edu/~leeb/duplexer.pdf, "duplexer.pdf", which
describes cavity filters rather well, and have uploaded it to the
Files on this site. Gives a pretty good perspective on the
difficulties of brewing your own (not that it can't be done), and
also why they cost so much.

BTW: hope I haven't infringed copyright by posting this document.

-P.




---------------------------------------------------------
LPFM Website: http://au.groups.yahoo.com/group/LPFM_Radio
Yahoo! Groups Links





~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
CAUTION : This email message and attachments are confidential and
may contain legally privileged information or copyright material. If you
have received this email in error, please advise the sender immediately
by return email and then delete both messages and any attachments.
If you are not the intended recipient you are notified that any use,
distribution, amendment, copying or any action taken or omitted to be
taken in reliance of this message or attachments is prohibited. We do
not accept liability in connection with computer virus, data corruption,
delay, interruption, unauthorised access or unauthorised amendment.
Views expressed in this email may not be those of originating organisation
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

<<<< GWAVASIG >>>>

Oooooooops, in my previous post, the link should have read:

http://www.utm.edu/~leeb/duplexer.pdf

-P.

--- In LPFM_Radio@..., "Jochen Siegenthaler"
<Jochen.Siegenthaler@b...> wrote:
> Thats an easy one - No.
> Hunt up some ham radio books - they tend to have that sort of
stuff in
> them
> Jochen
>
> >>> radiopegasus@h... 22/07/04 >>>
> You have indeed opened up a minefield..lets open it further..
> Do you have drawings , specs etc to build a cavity filter please
> Rgards Dave

---SNIP---

I have found a document at
http://www.utm.edu/~leeb/duplexer.pdf, "duplexer.pdf", which
describes cavity filters rather well, and have uploaded it to the
Files on this site. Gives a pretty good perspective on the
difficulties of brewing your own (not that it can't be done), and
also why they cost so much.

BTW: hope I haven't infringed copyright by posting this document.

-P.

--- In LPFM_Radio@..., Andrew Dubber <dubber@g...>
wrote:
> Hi all,
>
> One of the more sensible voices on the LPFM front in the US is a
guy
> called Pete Tridish (he says 'Petri Dish') from the Prometheus
Radio
> Project. I met up with him when I was in the States last year, and

---SNIP---

>
> Interview with Petri:
> http://www.cjr.org/issues/2003/5/qa-kelliher.asp
>

I loved this answer given by Petri in the interview at
http://www.cjr.org/issues/2003/5/qa-kelliher.asp

"What can a low-power FM station accomplish in a community that
commercial radio isn't accomplishing?

Community radio believes that part of its mission is to broaden and
deepen the listening experience of its audience. If you ask
teenagers on the street what kind of music they want they will
probably say Britney Spears. But they want to hear Britney Spears
because that's what they've heard. That doesn't mean they wouldn't
appreciate music from Kenya. It's really a question of what people
are exposed to and what their options are. It really is very
important for there to be place on the dial that in some ways is
less successful, that presents programs that are not going to be as
popular - but is a place where you can go when your ear grows past
the bubble-pop of our culture. I think those are sort of the green
spaces - the common public spaces - that we need to be thinking
about as a culture. They have an effect that goes beyond the
audience numbers."

Pretty much sums it up for me.
-P.

----- Original Message -----

From: yellowbeard

To: LPFM_Radio@...

Sent: Thursday, July 22, 2004 12:05 PM

Subject: Re: [LPFM] Re: How close can two different stations be?

A note of caution: All output filters have an inherrent insertion loss,
which means you lose power putting your signal thru one, professional or
home made. Are the regulations you guys operate under based on transmitter
output or radiated power from the aerial?

A note of caution: All output filters have an inherrent insertion loss,
which means you lose power putting your signal thru one, professional or
home made. Are the regulations you guys operate under based on transmitter
output or radiated power from the aerial?


Visit Yellowbeard's gashy website:
http://homepage.eircom.net/~yellowbeard
----- Original Message -----
From: "Jochen Siegenthaler" <Jochen.Siegenthaler@...>
To: <LPFM_Radio@...>
Sent: Wednesday, July 21, 2004 10:42 PM
Subject: [LPFM] Re: How close can two different stations be?


> "will it lessen interference on our signal from other transmissions on
> the next band"
>
> If by "next band" you mean adjacent FM stations, then no. the ability
> for a receiver to discriminate one station from another depends on the
> receiver design. Expensive receivers work better, cheap receivers are
> crappy.
>
> As an example: I have 2 stereos at home, a Sony and a Philips. The
> receiver in the Philips is heaps better than the Sony, and can clearly
> receive a LPFM station, and happily decode their RDS.
> The Sony struggles, I get adjacent channel interference all the time,
> and it cannot decode the RDS.
> The difference is the receiver design.
>
> If by "next band" you mean, say another band (like TV or aeronautical)
> then again no, the receiver design determines how much interference gets
> thru.
>
> So for eveyone to happily co-exist, then everyone should ensure their
> output signal is clean. Everyone should have an output filter that
> ensures spectrual purity.
>
> Like I say, the professional stations do.
>
> In fact, I believe this is a radio regulations requirement (to have
> spectral purity), and covered in the RFS29 spec (some one correct me if
> I'm wrong)
>
> Jochen (what a minefield I've opened up!)
>
>
> >>> mofofm@... 22/07/04 >>>
> If we put a output filter in will it help our signal beside sending
> a cleaner signal, ie. will it lessen interference on our signal from
> other transmissions on the next band or would the other station need
> a filter also?
>
>
>
>
>
>
> --- In LPFM_Radio@..., "Jochen Siegenthaler"
> <Jochen.Siegenthaler@b...> wrote:
> > A case has recently been proven in court (this year) that problems
> such
> > as you describe are NOT the responsibility of the broadcaster or
> the
> > MED.
> >
> > ie: the court decided that as the MED had licenced the transmission
> > correctly, and that the transmission was operating perfectly in
> > accordance with the licence, there was no blame or responsbility on
> > either the broadcaster or the MED when problems occur in a
> receiver.
> >
> > At the end of the day, a shitty receiver will have problems,
> regardless
> > of how clean the broadcast is
> >
> > As a broadcaster, every LPFM operator has the responsibility to
> ensure
> > their output signals are clean and are not radiating any out of
> band
> > unwanted harmonics or submarmonics.
> >
> > Hence I recommend output filters on every transmitter.
> >
> > After all, the professionals install filters to ensure compliance,
> why
> > should the LPFM operators behave any differently?
> >
> > Jochen
> >
> > >>> rich@i... 20/07/04 >>>
> > --- In LPFM_Radio@..., "Jochen Siegenthaler"
> > <Jochen.Siegenthaler@b...> wrote:
> > > Hi,
> > >
> > > Chch has TV channel 6 in operation (TV3) which is 188 to 195MHz,
> so
> > > watch your intermod.
> >
> > Also, anyone nearby may have the harmonics made in the input stage
> of
> > there shitbox TV or VCR/sky tuner.
> >
> > This brings up something I was wondering.
> >
> > What happens legality wise if your signal is clean, but it ends up
> > making harmonics on someones shitty antenna amplifier or similar,
> > stuffing up there reception. Is it a case of too bad for the person
> > thats interfeered with, or is it the problem of the broadcaster?
> >
> >
> >
> > ---------------------------------------------------------
> > LPFM Website: http://au.groups.yahoo.com/group/LPFM_Radio
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > CAUTION : This email message and attachments are confidential and
> > may contain legally privileged information or copyright material.
> If you
> > have received this email in error, please advise the sender
> immediately
> > by return email and then delete both messages and any attachments.
> > If you are not the intended recipient you are notified that any
> use,
> > distribution, amendment, copying or any action taken or omitted to
> be
> > taken in reliance of this message or attachments is prohibited. We
> do
> > not accept liability in connection with computer virus, data
> corruption,
> > delay, interruption, unauthorised access or unauthorised amendment.
> > Views expressed in this email may not be those of originating
> organisation
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> >
> > <<<< GWAVASIG >>>>
>
>
>
> ---------------------------------------------------------
> LPFM Website: http://au.groups.yahoo.com/group/LPFM_Radio
> Yahoo! Groups Links
>
>
>
>
>
>
>
> ---------------------------------------------------------
> LPFM Website: http://au.groups.yahoo.com/group/LPFM_Radio
> Yahoo! Groups Links
>
>
>
>
>
>

Thats an easy one - No.

Hunt up some ham radio books - they tend to have that sort of stuff in
them

Jochen



>>> radiopegasus@... 22/07/04 >>>





You have indeed opened up a minefield..lets open it further..
Do you have drawings , specs etc to build a cavity filter please
Rgards Dave
>From: "Jochen Siegenthaler" <Jochen.Siegenthaler@...>
>Reply-To: LPFM_Radio@...
>To: <LPFM_Radio@...>
>Subject: [LPFM] Re: How close can two different stations be?
>Date: Thu, 22 Jul 2004 10:42:00 +1200
>
>"will it lessen interference on our signal from other transmissions on

>the next band"
>
>If by "next band" you mean adjacent FM stations, then no. the ability

>for a receiver to discriminate one station from another depends on the

>receiver design. Expensive receivers work better, cheap receivers are

>crappy.
>
>As an example: I have 2 stereos at home, a Sony and a Philips. The
>receiver in the Philips is heaps better than the Sony, and can clearly

>receive a LPFM station, and happily decode their RDS.
>The Sony struggles, I get adjacent channel interference all the time,

>and it cannot decode the RDS.
>The difference is the receiver design.
>
>If by "next band" you mean, say another band (like TV or aeronautical)

>then again no, the receiver design determines how much interference
gets
>thru.
>
>So for eveyone to happily co-exist, then everyone should ensure their

>output signal is clean. Everyone should have an output filter that
>ensures spectrual purity.
>
>Like I say, the professional stations do.
>
>In fact, I believe this is a radio regulations requirement (to have
>spectral purity), and covered in the RFS29 spec (some one correct me
if
>I'm wrong)
>
>Jochen (what a minefield I've opened up!)
>
>
> >>> mofofm@... 22/07/04 >>>
>If we put a output filter in will it help our signal beside sending
>a cleaner signal, ie. will it lessen interference on our signal from
>other transmissions on the next band or would the other station need
>a filter also?
>
>
>
>
>
>
>--- In LPFM_Radio@..., "Jochen Siegenthaler"
><Jochen.Siegenthaler@b...> wrote:
> > A case has recently been proven in court (this year) that problems

>such
> > as you describe are NOT the responsibility of the broadcaster or
>the
> > MED.
> >
> > ie: the court decided that as the MED had licenced the transmission

> > correctly, and that the transmission was operating perfectly in
> > accordance with the licence, there was no blame or responsbility on

> > either the broadcaster or the MED when problems occur in a
>receiver.
> >
> > At the end of the day, a shitty receiver will have problems,
>regardless
> > of how clean the broadcast is
> >
> > As a broadcaster, every LPFM operator has the responsibility to
>ensure
> > their output signals are clean and are not radiating any out of
>band
> > unwanted harmonics or submarmonics.
> >
> > Hence I recommend output filters on every transmitter.
> >
> > After all, the professionals install filters to ensure compliance,

>why
> > should the LPFM operators behave any differently?
> >
> > Jochen
> >
> > >>> rich@i... 20/07/04 >>>
> > --- In LPFM_Radio@..., "Jochen Siegenthaler"
> > <Jochen.Siegenthaler@b...> wrote:
> > > Hi,
> > >
> > > Chch has TV channel 6 in operation (TV3) which is 188 to 195MHz,

>so
> > > watch your intermod.
> >
> > Also, anyone nearby may have the harmonics made in the input stage

>of
> > there shitbox TV or VCR/sky tuner.
> >
> > This brings up something I was wondering.
> >
> > What happens legality wise if your signal is clean, but it ends up

> > making harmonics on someones shitty antenna amplifier or similar,
> > stuffing up there reception. Is it a case of too bad for the person

> > thats interfeered with, or is it the problem of the broadcaster?
> >
> >
> >
> > ---------------------------------------------------------
> > LPFM Website: http://au.groups.yahoo.com/group/LPFM_Radio
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > CAUTION : This email message and attachments are confidential and
> > may contain legally privileged information or copyright material.
>If you
> > have received this email in error, please advise the sender
>immediately
> > by return email and then delete both messages and any attachments.

> > If you are not the intended recipient you are notified that any
>use,
> > distribution, amendment, copying or any action taken or omitted to

>be
> > taken in reliance of this message or attachments is prohibited. We

>do
> > not accept liability in connection with computer virus, data
>corruption,
> > delay, interruption, unauthorised access or unauthorised amendment.

> > Views expressed in this email may not be those of originating
>organisation
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> >
> > <<<< GWAVASIG >>>>
>
>
>
>---------------------------------------------------------
>LPFM Website: http://au.groups.yahoo.com/group/LPFM_Radio
>Yahoo! Groups Links
>
>
>
>
>

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