Hamilton Horta - PY2NI skrev:
> Hi everybody, is there any rule of thumb or whatever to determine the
> minimum
> amount of electrolitic caps should one put in a HV power supply?
> I am building a VHF PA with 1x GI-7B @ 2200V and another for a friend of
> mine with 2xGI-7B, I know that we are usually biased to use as much as
> possible but I am really eager to know the minimum for these two amps
> running 1xGI-7B and one with 2xGI-7B both operating at 2200V.
>
> Thanks a lot.
>
>
Hi Horta,
It's mostly a question of availability of suitable Caps. A well suited
common type is 450V/220uF, you could get by with 6 in series, but that
is cutting it very close, prudence would say use 8 in series giving a
reasonable margin on V and some 27.5uF - that'll do at least up to 500mA
and likely substantially more.
I'm using this configuration in both a 2200V supply for a Gi7b (144MHz)
and a 3000V supply for a QB-4/1100 (HF), both has given trouble-free
operation for several years and good reports on audio quality.
--
Vy 73 de OZ1PIF/5Q2M, Peter
** CW: Who? Me? You must be joking!! **
email: peter(no-spam-filler)@frenning.dk
http://www.frenning.dk/oz1pif.htm
Ph. +45 4619 3239
Snailmail:
Peter Frenning
Ternevej 23
DK-4130 Viby Sj.
Denmark
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