[AMPS] Transformers

[Rich Measures]

>
>Rich says:
>
>>?  Many models of Henry amplifiers do not use a peak discharge-current 
>>limiting glitch resistor is series with the hv positive lead.  Most of 
>>the hv transformer failures I have heard of in Henry amplifiers were 
>>associated with a noisy arc in the RF output compartment.  .  
>
>Rich, what was the failure mode? Open circuit, shorted turns, or insulation
>breakdown?
>
secondary insulation failure

>My only experience with HV xfmr failure has been insulation breakdown. That
>was using an (unpotted!) 1200 - 0 - 1200 in a FW bridge, in a remote
>controlled  amp out in the garage. 
>
>Should have known better - 1) xfmr not intended for that many volts from
>winding to frame. 2) using an unpotted xfmr in a damp location.
>
Proving once again that paper is really and truly hygroscopic
-  cheers, Peter. 


Rich...

R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures  


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