[Amps] Need for bias switch (CW/SSB)

[TexasRF at aol.com]

Sounds like class B; plate current flows for 180 degrees of the excitation  
cycle.
 
On the issue of key clicks and class C: Up until mid to late 50's when SSB  
came along, all of the ham amplifiers were class C and there was a lot more 
cw  then than these days.
 
The key click issue was handled by paying attention to the rise and fall  
time of the cw waveform. Same thing happens today without our knowledge as 
the  radio manufacturer handles the issue in the design stage. As you may 
know, some  manufacturers do a better job than others.
 
73,
Gerald K5GW
 
 
 
In a message dated 1/17/2016 7:46:53 A.M. Central Standard Time,  
kk7uv at bresnan.net writes:

I have  an adjustable bias where I can run a little ZSAC for Class AB.  But 
 I
can dial the bias until it *just* cuts off and I often use this setting  for
CW.  What class am I running when I do so?  I've heard it  informally called
class B/C.   Running CW at that setting, or  even a little deeper bias into
Class C territory does not create any  reported key clicks here.

Steve KK7UV



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