[AMPS] TL922 and burned grid choke

[Rich Measures]

>Good morning, 
>Here are details of repairs I found necessary when one 3-500Z
>had a grid-filament short in my TL922:
...snip...
>What is the best component to protect the filament/bias transformer
>is the event of an unexpected grid/filament short in the TL922?

Convert the 922 from V-cutoff bias to R-cutoff bias.  To do this:
1.  Remove the +120v power supply connection to the bias relay contacts.  
2.  Connect the existing 100k ohm, 0.5w resistor, across the NO contacts. 
  

Rich...

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


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