[Amps] complicated Bias circuit

[Paul Decker]

Thanks Joe,

What I meant by complicated is more that I haven't seen a bias circuit like that in any amateur publication.  I dug through a few handbooks dating back to 76 and the only circuit close was N6CA 2c39 bias circuit but his was for the purpose of not having to use high wattage zener diodes.

I'm sure it is a scaled version of a much higher power amplifier as ASI seems to do some pretty big amps.


Thanks,
Paul


Date: Sun, 04 May 2014 22:27:19 -0400
From: "Joe Subich, W4TV" 
To: amps at contesting.com
Subject: Re: [Amps] complicated Bias circuit
Message-ID: <5366F707.7020200 at subich.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed


 > What is the point of having 24VDC from T2?

The bias supply is *negative* DC ... where do you expect to get it
other than a separate low voltage supply?

This bias supply is hardly complicated ... it is a scaled copy of the
circuit used in many other much bigger amplifiers/transmitters.

73,

    ... Joe, W4TV