[Heathkit] HW-32A RF Amp

[Glen Zook]

As others have said, probably AB-1.  Class "C" only works for CW, FM, and PM.  Otherwise, the distortion will be astronomical.  Typically, around 60% efficiency at best.  Very occasionally, a little more and often a little less.

Glen, K9STH 
website:  http://k9sth.net 

    On Wednesday, May 22, 2019, 12:32:48 PM CDT, Robert Nickels <ranickel at comcast.net> wrote:  
 
 On 5/22/2019 11:17 AM, Ron Youvan wrote:
>
> I have learned that my transceiver is a Grid driven / Grounded Cathode
> circuit but what class is it? 

Virtually all grid-driven linear amplifiers are run in class AB1.   
Here's a table that lists appropriate bias voltages for popular PA tubes 
along with other parameters:

http://www.nj7p.info/Manuals/PDFs/Tubes/SwpTube.txt

Remember than in a transceiver like the HW-32 a high blocking bias is 
going to be present in receive mode, completely cutting the tubes off.   
To set the bias, the rig must be put in TX mode with no audio, and the 
resting current adjusted per the manual.

73, Bob W9RAN

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