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[AMPS] Blown TL922A... What to do?

To: <amps@contesting.com>
Subject: [AMPS] Blown TL922A... What to do?
From: 2@vc.net (measures)
Date: Fri, 8 Sep 2000 15:02:59 -0700
>
>Measures "word tricks":
>
>> >and the loaded Q of the tank. I 
>> >can easily get ten times that amount using HV rated parts in a PA.
>> >
>> 29kV out of a SB-220?  Only in the Rauchian World. 
>
>I said "a PA" , he said SB-220 and tagged on a name based insult.
> 
>> >I've measured higher voltages in the 220, although even 3700 volts 
>> >is enough to arc the air variable and bandswitch under some 
>> >cases. 
>> >
>> The SB-220 Tune-C typically limits potential to c. 3800v.  Did you use a
>> different Tune-C?
>
>Measure admits the breakdown is "typically limited" to 3800 volts, 
>and 3700 volts was measured in one test. Anyone with common 
>sense knows 3700 volts is too close to a capacitor typical arc 
>voltage of 3800 volts, and many parts can fail!   
>
When a 220's Tune-C arcs, nothing much happens.  
> 
>> >People at home, tune up your PA's. Unhook the antenna and short 
>> >the output port of your PA. Apply full drive, and tell me if you hear any
>> >sizzling noises or bangs in the tank or tube!  
>> >
>> With the output shorted, the brake is on the flywheel, and there would be
>> very little tank potential.  
>
>This is a bad misconception! 

Welcome to the world of reality. 

>A short does not absorb energy in an RF system, it reflects it! 
>Measures somehow claims shorting the output of your PA to 
>ground so the PA drives nearly zero ohms stops the tank for 
>storing energy.
>
>Anyone want to try it to see if the PA harmlessly runs along with 
>full drive or explodes in a big bang?
>
>I'm disappointed to see anyone tell others a short absorbs energy.
>
?  It doesn't.  It slows the flywheel.  
\
end

-  Rich..., 805.386.3734, www.vcnet.com/measures.  
end


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