[AMPS] 572-B Input impedance??

[Rich Measures]

>
>I need the approximate input impedance for a pair of 572-B's??  I am
>working on the input matching on an SB-200 to six meters.  Abt 60ohms??
>
>Still have parasitc oscillation problem and am suspicious abt the plate
>RF choke,  dipmeter shows resonance at 52 (MHz)???  Any ideas?? ......
>
... put a thin coat of urethane varnish on wire to hold in place, when 
dry, remove enough turns to move resonance above 60MHz.  //  At VHF, I 
would not try to use VHF suppressors. 
.  
-  later,  Phil


Rich...

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


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