[Drake] Not even a spark. Well, a tiny one ...

Wed, 3 Jul 2002 20:36:55 -0500

Does this account for the tone of the calibrator sounding more harsh, and
have something of a buzz?

Been wondering about that, and meaning to ask.  Glad someone else did and
reminded me of the issue.  I'll check out the caps on mine.

Dan W. Dooley  WB5TKA  Bedford, Texas
    e-mail to: [email protected]
    Web site: http://www.qsl.net/wb9tka
May Goddes love blest ye alle

----- Original Message -----
From: "Harvey D. D. Hetland" <[email protected]>
To: <[email protected]>; <[email protected]>
Sent: Wednesday, July 03, 2002 4:57 PM
Subject: Re: [Drake] Not even a spark. Well, a tiny one ...

> Ed:
>
> The most common failure in the R-4B calibrator that I have experienced is
the
> filter capacitor used in the half-wave rectifier.  It is C192, 1000 uF
shown in
> the lower right portion of the schematic.  It is filtering the d.c. from
D16
> which uses the filament winding for an a.c. source.  Good luck.
>
> 73, Harvey, N6MM
>
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