[R-390] Break in function

[David Wise]

> From: Roy Morgan [mailto:roy.morgan@nist.gov]
>=20
> At 06:39 PM 3/11/03 -0700, Kenneth wrote:
>
> > The above radio is hooked to a Johnson Viking II through a=20
> > TR relay.  It
> > (the antenna relay) does the antenna switching and it has
> > additional connects which I  use to operate the break in=20
> > function on the
> > 390A. ...  My question
> > concerns the break in relay in the 390A does it just disconnect
> > the antenna, and mute the receiver.  Is the speaker muted as well?
>=20
> Ken and others,
>=20
> Some time ago I wrote a detailed description of the break-in=20
> function, with=20
> part numbers and such. I can't find it just now but here are=20
> the basics for=20
> the R-390A:

[snip]

The R-390A antenna relay pulls in to mute.
My '54 Motorola is sticky, doesn't always
pull in completely in spite of normal coil
voltage.  I'll get to it soon.  You might have
the same thing.  Hook up a decent amount of antenna.
In CAL mode, can you hear stations?  You should not
hear anything, not even faintly, except the calibrator.

73,
Dave Wise