[AMPS] Re: 2.5Mh-rfc

[Roy Koeppe]

Jim,

All good points. The exploding RFC was a pretty good clue however, to QRT
fast! Actually, the DC at the antenna connector I was referring to was
static build-up from an un-DC grounded antenna, which can snap loudly inside
the amp cabinet. Such potentials could possibly far exceed your plate
voltage? If so, that could conceivably contribute to breaking down your
blocking cap?

TNX, 73,  Roy    K6XK
----- Original Message -----
From: Jim Thomson <jim_thomson@bctel.com>
To: <royanjoy@ncn.net>
Sent: Tuesday, May 18, 1999 10:28 AM
Subject: 2.5Mh-rfc


> Roy,typical pi wound 2.5Mh chokes have abt 35 ohms dc resistance.
> The guys at the contest site had a plate block cap let go(shorted).
> 2.5Mh choke blew to a million pieces!    Amp was still running,albeit
> with 5kv going up coax!!  Correct component to use is a torroid. Even
> the small molded ones are extremely low DC resistance.
>
> -I think some guy had the right idea,and yarded the wrong component out
> of his junk box. This mistake(along with others) has been repeated in
> every book since day one.
>
> -Just my two cents worth.
>
> Cul............Jim VE7RQ
>


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