OT: LPFM transmitter wanted

[Rod Ai7NN]

Folks,

I found a dizzying array of items on the web, from MP3 device
attachments to rather high quality exciters for "neighborhood
broadcasting". Anybody have a suggestion or two for a decent quality
rig that couples to an MP3/CD-player, stereo...etc. Only need to get
the signal 50-100ft or so.

Off list replies please, probably not of general interest to the list.

TIA
--
Rod, Ai7NN
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[Phil Kane-2]

On Sun, 18 Feb 2007 15:19:28 -0800, Rod Ai7NN wrote:

>I found a dizzying array of items on the web, from MP3 device
>attachments to rather high quality exciters for "neighborhood
>broadcasting". Anybody have a suggestion or two for a decent quality
>rig that couples to an MP3/CD-player, stereo...etc. Only need to get
>the signal 50-100ft or so.

  A LPFM station is in fact a broadcast station requiring a FCC
  license therefor, with all the rules and obligations pertaining
  thereto.  It is not a "hobby" or "consumer" operation.

  Regarding what you have in mind, unless the non-licensed device
  is CERTIFIED for operation in compliance with FCC Rules Part
  15, you risk losing your ham license for unauthorized operation.
  I spent 30 years with the FCC tracking down and putting such
  unauthorized devices off the air.

  I'm sure that with a little effort you can find a certified
  device - they do exist for exactly what you want - but much of
  what you find on the 'net is not certified.

>Off list replies please, probably not of general interest to the list.

  It should be of interest to all licensed amateurs.

--
   73 de K2ASP - Phil Kane
   Elecraft K2/100   s/n 5402




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[Ken Kopp-2]

Perhaps a (legal) wireless microphone would meet
the requirement.  Radio Scrap sells them.

As Phil has already cautioned ... don't endanger your license!

73! Ken Kopp - K0PP
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[Jim Brown-10]

On Sun, 18 Feb 2007 15:19:28 -0800, Rod Ai7NN wrote:

>Anybody have a suggestion or two for a decent quality
>rig that couples to an MP3/CD-player, stereo...etc. Only need to get
>the signal 50-100ft or so.

A visit to places like Fry's Electronics or Best Buy will yield several
VERY low power FM transmitters intended for use with personal devices like
IPOD's. I'm using one to take streaming jazz from my computer to a few FM
receivers around the house. These are good for about 100 ft. All work with
self-contained antennas that are almost impossible to defeat (that is, to
attach a better antenna to), and dead simple to use. Thus, I believe that
they DO conform to FCC rules, which are written in terms of some very low
value of field strength at a defined distance (I think 100 ft), and that
non-defeatable antenna system. I paid $50 for the one I have, which
carries the Macally label and an FCC sticker of compliance.

The much higher power kits sold on the internet (100 mW and higher) are
NOT legal in the US.

If you have a legitimate use for low power broadcasting and can license
it, a well established company in PA called LPB makes the transmitters and
can assist you with licensing issues.  

Jim Brown K9YC



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[Rod Ai7NN]

Thanks Jim,

On 2/19/07, Jim Brown <[hidden email]> wrote:
> On Sun, 18 Feb 2007 15:19:28 -0800, Rod Ai7NN wrote:
>
> >Anybody have a suggestion or two for a decent quality
> >rig that couples to an MP3/CD-player, stereo...etc. Only need to get
> >the signal 50-100ft or so.
>
> A visit to places like Fry's Electronics or Best Buy will yield several
>

Ugh, no such critter where I now live.

> VERY low power FM transmitters intended for use with personal devices like
> IPOD's. I'm using one to take streaming jazz from my computer to a few FM
> receivers around the house. These are good for about 100 ft. All work with

Precisely what I'm looking for. (not sure way some posters thought I
was after something illegal, I thought  my request was clear.)


> non-defeatable antenna system. I paid $50 for the one I have, which
> carries the Macally label and an FCC sticker of compliance.
>

I'll check this one out. Belkin's offering doesn't get good CNET
reviews. C Crane has a unit as well. All available on the net. (I shop
via internet mostly, see above, not sure why the early poster presumed
everything on the net was illegal))

--
73, Rod Ai7NN --seek to understand, then be understood--
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[Phil Kane-2]

On Mon, 19 Feb 2007 18:44:25 -0800, Rod Ai7NN wrote:

>Precisely what I'm looking for. (not sure way some posters
>thought I was after something illegal, I thought  my request was
>clear.)

  With all due respect, Rod, you DID say "LPFM".  That has a
  specific meaning to us regulatory and broadcast folks - an
  installation covering a local area with power anywhere between
  10 and 100 Watts, serving the public.

  What you really meant was a "wireless FM adapter" to which
  several here pointed you.  Have fun with it.

  I, for one, prefer working PSK on 40 meters, which hasn't been
  too successful for me lately <g> .

--
   73 de K2ASP - Phil Kane
   Elecraft K2/100   s/n 5402



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[k9di]

       Hello,
    Radio Shack has, or had a couple of very nice little part 15 FM
xmtr's.  One had a choice of three preset frequencies, and the more
expensive one could be set for any freq in the FM BC band..

Vy 73/72
de

Wayne K9D

k9di (at) k9di (dot) org

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