SB-10

[Garey Barrell]

Hopefully one of the Heathkit guys here will have a definitive answer.

I seem to recall that the earlier units were made with the "Custom built"
black unit while later units employed the B&W 2Q4 part.  Guess it could
have been the other way around, but...   B&W offered the 2Q4 on the market
for several years.

73, Garey - K4OAH
Atlanta

At 11:04 AM 1/2/2003, Marshall M. Dues wrote:
>Hello, Fred and Group,
>
>I bought a very clean SB-10 sideband adapter at the Belton, TX hamfest
>a couple of years ago to go with my two TX-1 Apache transmitters
>someday.  Your post prompted me to open up my SB-10 to look it over.
>Mine has the Barker & Williamson model 350 phase shifting module in the
>socket, and it has the words "Type 2Q4" in a stamped black circle about
>a half inch diameter on the top of the metal tube envelope.  The
>assembly manual on page 66 illustrates a black metal tubed phase shifter
>like you described.  My assembly manual is dated September, 1961.
>
>FRED HOLNAGEL wrote:
> > I have a query on the Single Sideband Adapter.  I have two of them.
> > One has the phasing network in the tube shaped container with the B&W
> > 350 designation. The other has an unmarked black tube with no
> > markings whatsoever on it. Looks like a 6SQ7 with no markings!  Does
> > this sound familiar to anyone? Thanks.
> >
> > clipped....
>
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