[AMPS] Full QSK for the SB-200

[Rich Measures]

>Rich,
>
>Okay--what about using the relay to handle the triggering of the cathodes? 
>Would this decrease the rough audio caused by RF switching?
>
Yes.  However, with the high speed switching circuit's ECBS, whenever 
current flows through the relay coils, current flows through the opto 
input.  This turns on Q1 which connects the cathodes to the neg. hv 
supply.  The ECBS switches in <10uS. There are no contacts to wear out.  
It makes no noise.  The bias is always in sync with the status of the RF 
relays.  
-  later, Tom
>
>----------
>> RF activated bias switching produces rough sounding audio and generates 
>> more IMD.. 
>



Rich...

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


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