[AMPS] re: commercial plate choke

[Rich Measures]

>
>A few days ago I asked a question regarding availability of
>commercial plate chokes and how to test homebrew chokes.
>
>Recommendations for commercial units were mostly Ameritron and RF
>Parts. I ordered the one from RF Parts, which, according
>to RFP's literature, is the one used by Ameritron. $22.95.
>
>Recommendations for testing involved bringing a gdo into the
>vicinity of the choke, with the choke installed in the
>circuit. I had a big fat resonance in the middle of 15 meters.
>Fortunately the B+ series resistor and diode across the plate
>current meter shunt prevented any major damage in the ensuing
>flash-bang. The choke had tested good all by itself outside
>the amp, with the terminals shorted, using the gdo.
>
>There was another recommendation for testing the choke, which involved
>disconnecting the choke from the tube, to see if pi-net resonance
>changed. That sounds like a good idea also, but I haven't tried it
>yet.
>
€  HV RFCs are also covered in 'Amplifiers', which is available on my Web 
site.  
>
€  later, Dave


Rich...

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


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