I am looking for an easily reproducible scheme of a 70MHz ATV FM transmitter/modulator.
two acceptable options:
- BB input, 70MHz output
or
- video input + audio input, 70MHz output
best 73
de
i2NDT Claudio
70MHz ATV FM transmitter/modulator
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This forum is run by the BATC (British Amateur Television Club), it is service made freely available to all interested parties, please do not abuse this privilege.
Thank you
70MHz ATV FM transmitter/modulator
i2NDT Claudio
Dalmine, Italia
Dalmine, Italia
Re: 70MHz ATV FM transmitter/modulator
Hi Claudio,
I have an old German design with an IF range 80-150 MHz.
Video input and audio modulated on a 5.5MHz carrier, output level 10dBm and level adjustable over 10dB.
https://www.dropbox.com/s/hfuscjp4u2ls8 ... r.pdf?dl=0
To lower the IF freq. change L4 and alter the output filter to meet your requirements.
73's de ON1AVO
I have an old German design with an IF range 80-150 MHz.
Video input and audio modulated on a 5.5MHz carrier, output level 10dBm and level adjustable over 10dB.
https://www.dropbox.com/s/hfuscjp4u2ls8 ... r.pdf?dl=0
To lower the IF freq. change L4 and alter the output filter to meet your requirements.
73's de ON1AVO
Re: 70MHz ATV FM transmitter/modulator
Hi Claudio,
I found this today:
http://www.robkalmeijer.nl/techniek/ele ... index.html
It may help?
73, Richard
I found this today:
http://www.robkalmeijer.nl/techniek/ele ... index.html
It may help?
73, Richard