[Milsurplus] BC-375

[Stephen M. Linscott]

On Tue, 1 Jun 2004 W7QHO at aol.com wrote:

> > According to Bob Keys, NA4G, on the Boatanchors list, if you adjust the
> > T/R relay properly you won't have chirp. The manual explains how to set
> > the contact timing so that the oscillator gets HV before the RF hits the
> > antenna. The rig was designed with "differential keying", but many hams
> > "improved" the keying circuit and signal quality suffered!
> >  Another
> > argument for leaving the old rigs unmodified. :-)
> >
>
> Proper timing of the T/R relay is important of course. In my experience, however, relay adjustment will not overcome poor PS regulation in regards to chirp.
>
> Dennis D. W7QHO
> Glendale, CA

You are right, of course.  I didn't mean to imply that the relay is a
cure-all.  Years ago I ran a 375 with the PE-73 dynamotor, and it had a
decent signal. But when I built a PS with a four-section filter, a
swinging choke input and a heavy bleeder, the sig was very nice.

                                 73, - Steve - W5EGP


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*   Steve Linscott           Information Technology Division     *
*   linscot at rice.edu      Rice University       Houston, Texas   *
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