[Boatanchors] Ceramic disk caps

[Carl]

I believe that OJ's started on the R-390 reflector back in the early 
90's. Some self styled guru declared that they had to be used and the 
myth developed a life of its own. I used discs in most places on my 
R-390A and it hasnt needed service in over 20 years.

OJ's = wasted money and a continuation of the myth..

Carl
KM1H



----- Original Message ----- 
From: "Glen Zook" <gzook at yahoo.com>
To: "Carl" <km1h at jeremy.mv.com>; <FLBOATANCHORS at yahoogroups.com>; 
<boatanchors at mailman.qth.net>; "WØQFC" <erastber at tampabay.rr.com>
Sent: Tuesday, March 03, 2009 12:24 PM
Subject: Re: [Boatanchors] Ceramic disk caps



It does matter!  You are still dealing with r.f.

In the audio circuits for coupling (i.e. the 12AX7 and 6DE7) use orange 
drops or similar where the paper type capacitors were before.  You can 
use disc ceramics for the bypass capacitors in the audio circuits as 
well.

Besides being better for r.f. disc ceramic capacitors are MUCH cheaper 
than orange drops, etc.

Glen, K9STH

Website:  http://k9sth.com


--- On Tue, 3/3/09, WØQFC <erastber at tampabay.rr.com> wrote:

My question about the disc caps came up because I am rebuilding several 
DX-35 and DX-40 rigs.

I understand that discs are better for bypassing in RF circuits because 
of their lower inductance, but in a circuits like the DX-35/40 does it 
really make THAT much difference?