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maveric_manic
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Hobbies - Musician - Tube Amps Only Please!

Join Date: Apr 2009
Location: Santa Clarita, California USA
Posts: 519

RF Amp to Boost FM Stereo Transmitter

09/02/2009 6:57 AM

I am in a location where you can not pick up FM so everybody is on cable or SAT. I just want to boost my RF output a little bit so I can pickup my iPod from a transmitter location to all the receivers in my medium sized house without static and dropout.

Does any body know of a RF amp <500mW that could drive a FM transmitting antenna <1W @ 50 ohm BNC? I know Part 15 of the FCC but no one is going to pick it up because it is FM dead out here mountains everywhere. My track housing is called Mountain View LOL. It is pretty bad when you can only transmit 100' or so.

Please if your from the FCC I am going to limit the power and not broadcast all over the street. What about Cb's and their 1000W linears. I live in CA and I heard one guy from Florida in the daytime, no skip, but he was and his handle was gator something if I remember. LOL

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bhankiii
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Join Date: Sep 2006
Location: El Lago, Texas, USA
Posts: 2348
Good Answers: 51
#1

Re: Boosting a FM stereo transmitter with RF amp 88-108 Mhz

09/02/2009 7:22 AM

FM transmitter kits are pretty common - if you're a little handy with a soldering iron.
maveric_manic
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Join Date: Apr 2009
Location: Santa Clarita, California USA
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#2
In reply to #1

Re: Boosting a FM stereo transmitter with RF amp 88-108 Mhz

09/02/2009 7:47 AM

I have a FM sterio chip with crystal control with selectable frequency. The problem is it is limited in mW output. So I need a very small linear amp in the FM band.

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bhankiii
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Join Date: Sep 2006
Location: El Lago, Texas, USA
Posts: 2348
Good Answers: 51
#3
In reply to #2

Re: Boosting a FM stereo transmitter with RF amp 88-108 Mhz

09/02/2009 9:27 AM

Have you tried googling "FM RF amp"?

there seems to be a lot out there,

http://www.electrokits.com/electronics/radio-circuits/107.htm
Guest
#7
In reply to #3

Re: Boosting a FM stereo transmitter with RF amp 88-108 Mhz

09/02/2009 3:56 PM

I was about to do that but it was 3:00AM when I thought the same thing thanks. I have circuits for wideband RF amps this might work.
stevem
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Join Date: Sep 2007
Location: Defreestville, NY
Posts: 642
Good Answers: 48
#4

Re: Boosting a FM Stereo Transmitter with RF Amp 88-108 Mhz

09/02/2009 9:40 AM

Maybe a better transmitting antenna that is properly matched would do the trick : http://www.hobbytron.com/Tru-Match-FM-Broadcast-Antenna-Kit.html

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Guest
#6
In reply to #4

Re: Boosting a FM Stereo Transmitter with RF Amp 88-108 Mhz

09/02/2009 3:51 PM

I have a 50 ohm BNC tuned antenna for the FM band. I just need a RF amp with 50 ohm output and it should match as far as VSWR.
frankd20
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Hobbies - HAM Radio - New Member Hobbies - Model Rocketry - New Member

Join Date: Jan 2007
Posts: 420
Good Answers: 18
#5

Re: Boosting a FM Stereo Transmitter with RF Amp 88-108 Mhz

09/02/2009 9:50 AM

Try some of these links, the last one has amplifier kits also. You should go with a new transmitter as your iPod FM transmitter doesn't have a clean output and amplifying it as is, will rebroadcast unintended frequencies. Such unintended harmonics could mess with such things as air traffic radios.

http://www.panaxis.com/

http://www.ramseyelectronics.com/cgi-bin/commerce.exe?preadd=action&key=FM100B

http://www.broadcastwarehouse.com/bw-broadcast/pll+-1w-exciter/6/product

http://www.freeradio.org/store/frb_kits.html#exciter
maveric_manic
Guru
Hobbies - Musician - Tube Amps Only Please!

Join Date: Apr 2009
Location: Santa Clarita, California USA
Posts: 519
#8
In reply to #5

Re: Boosting a FM Stereo Transmitter with RF Amp 88-108 Mhz

09/02/2009 4:29 PM

Thanks for these links this answers my question! Great job!

__________________
Regards, maveric_manic - "Knowledge is Power and Wisdom is knowing how to use it"
Guest
#9

Re: RF Amp to Boost FM Stereo Transmitter

11/21/2009 8:27 AM

SEE www.broadcasteletec.com

very good rf amplffier and solid state fm transmitter
Off Topic (Score 5)
Guest
#10

Re: RF Amp to Boost FM Stereo Transmitter

11/21/2009 8:27 AM

fm transmitters

www.broadcasteletec.com
Guest
#11
In reply to #10

Re: RF Amp to Boost FM Stereo Transmitter

11/21/2009 8:45 AM

we have buy FAL1500 1.5KW FM compact solid state transmitter

its very good!!

radio easyfm!

at eletec france
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bhankiii (2), frankd20 (1), Guest (5), maveric_manic (2), stevem (1)

Previous in Forum: Internet to TV Connection   Next in Forum: hart protocol interface
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