[sebhc] H89 docs

[Barry Watzman]

The H-19A/89A vs. the original H18/88/89.

There were major changes made in about 1980 or 1981 to achieve compliance
with FCC class "B" emission requirements.  All of the boards and circuitry
were changed.  The late model units have a circuit board on the CRT socket.
The early model units only have a socket with wires to the terminal logic
board.

What you have probably is the "late model" documentation.


-----Original Message-----
From: sebhc-bounces at sebhc.org [mailto:sebhc-bounces at sebhc.org] On Behalf Of
steve shumaker
Sent: Thursday, May 19, 2005 3:38 PM
To: sebhc at sebhc.org
Subject: RE: [sebhc] H89 docs

What constitutes "late model" H89?  (I  recently acquired what I think is a 
complete set of H89 docs)  Model is 89A and the docs are dated 1981

steve shumaker

At 02:48 PM 5/19/2005 -0400, you wrote:
>We don't have a late H89 assembly or operations manual as far as I know
>(there is an early set of H88 docs, before the changes to meet FCC class
B),
>and we don't have any schematics of any variant of the 19/88/89, although
>getting those scanned is difficult because of their size (it requires a
>large format scanner).
>
>[Note, I am only personally willing to scan manuals that are either
>loose-leaf or that I can "unbind" and, if necessary, cut into 8.5" x 11"
>pages]
>
>
>-----Original Message-----
>From: sebhc-bounces at sebhc.org [mailto:sebhc-bounces at sebhc.org] On Behalf Of
>Peter Shkabara
>Sent: Thursday, May 19, 2005 2:02 PM
>To: sebhc at sebhc.org
>Subject: [sebhc] H89 docs
>
>What specific H89 docs are you looking for? I have some schematics and
docs.
>
>Peter
>-----------------------------------------------------------
>peter59 at sbcglobal.net - http://www.geocities.com/anapro.geo/
>
>
> > -----Original Message-----
> > However, I don't think that we have good electronic
> > documentation on the
> > H19/89, and I know that I do not have schematics, but getting
> > the large
>
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