[Amps] Tube swap

[William Turner]

Not to reopen old wounds, but Measure's intention was to use nichrome to 
introduce more loss at VHF than HF
f by virtue of the skin effect, which has more effect as you go higher 
in frequency.

  Where he went wrong, IMO, is the original assumption that you actually 
need more loss at VHF. Properly done, the conventional copper VHF 
suppressor works just fine.

Nearly everything else on Measure's web site is good info, well worth 
looking at. His speed-up circuit for making relays switch faster is 
especially clever, although I don't know if he was the original inventor 
or is just passing it on.

BTW he sells high-current electrolytics at a good price, something that 
comes up here from time to time.

73, Bill W6WRT
who takes occasional communion at the Church of the Holy Measures.


On 1/28/2014 11:48 AM, Fuqua, Bill L wrote:
> The point is
> to simply introduce loss, lower the Q, of VHF parasitic resonances that
> can exist in the plate circuit of the amplifier.