Need help

[CyberGeezer]

----- Original Message -----
From: Ed Richards <k6uuz at JUNO.COM>
To: <HEATH at LISTSERV.TEMPE.GOV>
Sent: Thursday, February 14, 2002 9:09 AM
Subject: Need help


> I bought a LMO that came with a 6JH6 tube in it. I can
find out nothing
> about this tube. The RCA tube manual doesn't list it. The
ARRL handbook
> only gives it's base diagram. I need to know (a) is it
suitable for use
> in a LMO? (b) what is the filament current? (c) where do I
find a on-line
> tube manual? Can anyone help me? Thanks.

This probably isn't much help--

--but in the article _Keeping the Green Flame Burning Part
II --  Restoring the Heathkit HW-101_
(CQ Magazine, November 2001) we find on page 34:

Most of the changes among models in the SB series were
slight.  The SB-100 was the first of the radios to use what
Heath called an "LMO", or linear master oscillator.  These
were preassembled and tested.  The builder of the kit only
had to bolt the LMO to the chassis and hook some wires to
it.  The SB-101 was the same as the SB-100 with three
exceptions.  The first was the option to used an external
LMO, namely, the SB-640.  The second improvement was the
addition of the optional CS filter, and the third was the
use of 6HS6 tubes in the receiver front end.

At least we know there's such a tube.
73 de W2GERry

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