Ed,
My recent EL-34 project runs linear AM with a single tube biased and
driven for AB2. With a resonant tank circuit on the plate you don't have to
run class A for single ended class linear amplifier. You are correct for
most audio circuits however.
Regards,
Jim WD5JKO
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Edward B Richards
Sent: Wednesday, December 22, 2004 8:07 PM
To: [email protected]
Subject: Re: [AMRadio] Lowest level modulation
I would not modulate the oscillator, Steve. You would probably get more
FM than AM. Low level means the early stages of a transmitter. You should
have a buffer stage between the osc and the mod to prevent pulling the
osc during modulation. All stages after the modulator have to be linear.
That means class A for a single tube or class AB or B for push-pull
stages.
73, Ed Richards K6UUZ
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