[AMPS] Bias for SB-220

[Tom Rauch]

Rich wrote:

> €  How many peak volts on your 'scope?  With "normal" ALC indication,  my
> TS-440S overshoots to about 120v-p. into 50-ohms.  .  
 
The actual pulse lasts less than one mS, eyes can't follow and non-
storage scopes won't display random one mS pulses that occur 
right at the leading edge of envelope rise.

If you used a FAST peak-storage wattmeter, you would have a 
clear and accurate indication of overshoot levels. Lacking that, you 
could use a triggered storage scope triggered off the source at 
some early stage, and store about a dozen shots of leading edges 
and find the worse of the batch.



  
73, Tom W8JI
w8ji@contesting.com

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