[AMRadio] Lowest level modulation


Mike Dorworth, K4XM k4xm at arczip.com
Wed Dec 22 21:00:34 EST 2004


Hi , it is illegal to use a modulated oscillator below about 2 meters. It
will work but adds FM even to a crystal oscillator. In fact commercial vhf
equipment using crystals actually phase modulate the crystal oscillator to
get FM. They of course go through several multiplications to get the plus
and minus 5 kc deviation.. That's kHz for youngsters!.. The rules simply
state NO!..hope this helps.. Mike K4XM
----- Original Message -----
From: <StephenTetorka at cs.com>
To: <amradio at mailman.qth.net>
Sent: Wednesday, December 22, 2004 8:51 PM
Subject: [AMRadio] Lowest level modulation


> Hi All:
>
> As I understand it, low level modulation is anything prior to the amp.
>
> Therefore, is it possible to modulate the grid oscillator RF input
signal -
> crystal or otherwise - and expect an AM output?
>
> Next question: how?
>
> Regards,
> Steve
> WA2TAK
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