>
>Subject: Re: [AMPS] " Kein Rauch ohne Feuer ...."
>
>Someone plaese translate above for me!
>
>
>
>
>> The TL-922 uses 0.01uF disc ceramic RF bypass caps across the hv ps
>>electrolytics. The 110vdc ps filter capacitor has no RF bypass. Operate
>>much on 160m and it will eventually go kaput with a bang. . The fix is
>>to replace the +110v ps filter C and add some C to the factory-stock.
>>2000pF hv bypass. (2000pF is only c. 44 ohms of Xc on 160m.) In my
>>opinion, 10 - 20 ohms of Xc is adequate for most anode-supply bypass
>>applications.
>
>My "standard fix" to amps that cover 160 meters is to add 2 Cera-mite
>4700 pf @ 10kv disk ceramic caps in parallel with whatever is already
>at the base of the plate choke. I obtained a large bag of these caps
>years ago, and they seem to do the trick. In "amps with handles," you may
>want to use four to share the RFcurrent.
>
With 1a, a typical HV disc ceramic capacitor gets pretty warm. This is
why it takes at least of dozen of 'em to bypass the filament/cathode of
an 8171.
cheers, Phil
>
>
>later, Steve
>
>- Rich..., 805.386.3734, www.vcnet.com/measures.
>end
>
>
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>FAQ on WWW: http://www.contesting.com/FAQ/amps
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- Rich..., 805.386.3734, www.vcnet.com/measures.
end
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