>> Any change in current causes a resonant circuit to ring.
>> Ringing
>> amplitude depends on how fast the current changes and on
>> Q. Faster and
>> more Q =s more V. I have heard from more than a few
>> TL-922 owners who
>> report that a big-bang, flashover, and damage occurred
>> when their 922
>> was un-keyed.
That can be because of relay sequencing. Known to be a
problem in the stock TL922.
> Sure, but how fast does the current change? By the time
> the decoupling
> capacitors have charged to allow the tube to drift into
> cutoff, I doubt
> the rise time alone is going to make the anode ciruit ring
> at vhf.
Because of bypass caps and other component values, the
ringing can never have a higher peak at VHF than it has at
HF.
73,
Tom
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|