[AMPS] SB 220 vice SB221

[Rich Measures]

>> From:          Rich Measures <measures@vc.net>
>
>> Three times the anode supply potential of 2900v would be 8700v.  It makes 
>> little sense to me that the anode voltage could possibly soar to such 
>> heights when a tank is essentially out of resonance. 
>
>If you read what I wrote carefully, you'll see I specified the tank 
>IS resonant, the load is simply removed.
>
Yes, but the SB-220 tune C typically arcs when the load is connected, 
well after the amplifier has been tuned up.  I have inadvertently tuned 
my SB-220 up with the load removed.  There was no arcing in the tune C, 
(whose measured withstanding ability was 3600v).  .  .  .  8700v doesn't 
wash.  

>How this happens is simple.
>...snip...

Translation:  "Simple" usually means long and convoluted 'explanation' to 
cover exposed posterior.

>...snip...

Congrats John F., you were right about the smoke and mirrors.  Thanks for 
the warning.  

R. L. Measures, 805-386-3734, AG6K   


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