Fw: 104/104A

[Kees & Sandy]

I have a list around here somewhere, but the easiest thing to
do is compare the schematics. There was also a list of fixes
on Dale Wentz's, KB9JJA, Heathkit web site which will give you
an idea of 104 problems vs the 104A ( I made a hardcopy of
the fixes and can provide you a copy at cost if you want). The
major differences were a hotter frontend card which was much
easier to tune up on the 104A, improved tuning on some
frequencies which prevented proper operation on certain bands
on the 104, and incorporating MANY design improvement
changes.

Apparently the 104, which was Heathkit's FIRST major ALL Solid
State HF SSB Transceiver, was rushed to production (probably
over the loud objections of Engineering) to make the Christmas
rush and they paid for it later since the 104A upgrade kit was
offered free to 104 purchasers. Heathkit also started providing
several of the cards/sub-assys "prebuilt" to avoid construction
problems. It was quite a complex kit for the avarage builder
and Heath received many of them back as "unable to get it to
work". Also, if you returned your unit for servicing to Heath, for
whatever reason, the more important fixes were generally
installed for free. Check yours to see if there is a service
sticker ....late service dates are good.

All in all, it's a fine little transceiver, will provide you with lots
of education, is a SSB transceiver YOU can still repair, and
it's definitely a part of Heathkit history.

Check out my Radio Homepage for Heathkit SB-104(A)
repair.

73s Kees K5BCQ
Radio Homepage:  http://www.qsl.net/k5bcq/

----- Original Message -----
From: Martin Tippin <w0akg at AEROSURF.NET>
To: <HEATH at LISTSERV.TEMPE.GOV>
Sent: Monday, September 03, 2001 9:24 AM
Subject: 104/104A


Can any body tell me the main difference between the SB 104 and the 104A ?
Thanks guy's.
Martin L Tippin  W0AKG
140  Monarch Lane
Branson,  MO  65616

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