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Technical Topics => Equipment => Topic started by: PiratePoptart on May 23, 2011, 0019 UTC

Title: Changing Freq of Xmitter?
Post by: PiratePoptart on May 23, 2011, 0019 UTC

 So here's what my question is... :o
 Got an old BAse radio(motorola) it was used for Tow truck company..
My problem is it's at  40MHz anyway to change this to say....  ??? 88.5 Mhz? ???

Idea's?

Thanks

[/glow]

Title: Re: Changing Freq of Xmitter?
Post by: John Poet on May 23, 2011, 0826 UTC

DJ,

None of the type of fm-modulation radios used for voice communications (business type radios, etc) are likely to be suitable for broadcast use, even if you did change the frequency.  That type of FM modulation is a much narrower bandwidth than what is needed for 'FM broadcast'.

I had much the same idea once upon a time, but was assured it would not work well.

Title: Re: Changing Freq of Xmitter?
Post by: PiratePoptart on May 23, 2011, 1022 UTC

Quote from: John Poet on May 23, 2011, 0826 UTC

DJ,

None of the type of fm-modulation radios used for voice communications (business type radios, etc) are likely to be suitable for broadcast use, even if you did change the frequency.  That type of FM modulation is a much narrower bandwidth than what is needed for 'FM broadcast'.

I had much the same idea once upon a time, but was assured it would not work well.

Well it was just an idea one of my friends had....
Thanks

Title: Re: Changing Freq of Xmitter?
Post by: Seamus on May 23, 2011, 1228 UTC

It would certainly give a station a "unique" sound that would be unmatched by anything else on the air, that's for sure.

...just not in a good way.

Title: Re: Changing Freq of Xmitter?
Post by: PiratePoptart on May 23, 2011, 2016 UTC

Quote from: Seamus on May 23, 2011, 1228 UTC

It would certainly give a station a "unique" sound that would be unmatched by anything else on the air, that's for sure.

...just not in a good way.

Really? Dam well i guess ill stick with 230 Milliwatts then huh? lol Thanks guys

Title: Re: Changing Freq of Xmitter?
Post by: John Poet on June 02, 2011, 0418 UTC

If you want more power, check out ebay:
http://cgi.ebay.com/5W-stereo-radio-FM-pll-transmitter-broadcast-station-/300462011587?pt=LH_DefaultDomain_0&hash=item45f4ee74c3

That's dirt cheap for 5 watts.  Needless to say, you should use a low-pass filter after it.

Here's everything they have right now:
FM Broadcast transmitter on ebay
http://shop.ebay.com/i.html?_nkw=fm+broadcast+transmitter&_sacat=0&_odkw=fm+amplifier+pallet&_osacat=0&_trksid=p3286.c0.m270.l1313