Re: PET 2001 internal tape drive

From: Francesco Messineo <francesco.messineo_at_gmail.com>
Date: Fri, 9 Feb 2018 22:21:10 +0100
Message-ID: <CAESs-_zMrqOrmj9ni2gTHGeXbd5Bgeo4ZKqfwihto14DaqhTUw@mail.gmail.com>
On Fri, Feb 9, 2018 at 3:39 PM, Bill Degnan <billdegnan@gmail.com> wrote:

>>
>>
>
> I assume not necessary, but did you verify that the tape drive belt is OK?
> I had to replace mine by using an external tape drive's belt.


The belt looks ok. It's a bit weak, but it doesn't slip. I might try
to substitute it out of desperation.
So far I've replaced the LS14 with absolutely no difference. The write
circuit, according to the schematics and what I could find in the
actual board
is just part (4/6) of the LS14 and three resistors.
The erase head works, if I press record and play without sending any
data, the tape is erased very cleanly.
The first part of a program (I assume it's a sync record) is very
clean, but as soon as normal data is recorded, the recorded tape
become quite
too noisy (Yes, I should try maybe with another cassette, but I need
to find another one I can erase...).
I would very much like to try a head azimuth adjustment. All the other
tape drives I have, needed a bit of tweak to read/write reliably after
all these years. I think the hole could be under the label, but I'm
afraid it would bend if lifted...
Frank

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Received on 2018-02-09 22:00:02

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