[GreenKeys] M28ASR perf question

[William Wuttke]

Eugene,

If you are trying to punch a tape from the keyboard while the reperf is in
the loop you will always run into problems. The keyboard punches directly
to the punch mechanism through a mechanical linkage. The reperf uses a
selector mechanism which operates separately from the keyboard mechanical
punch linkage. So if the reperf is in the loop when you are trying to punch
a tape from the keyboard, both mechanisms are trying to punch the tape, and
confusion results. This gave me fits trying to understand this when I was
restoring my M28ASR.

Bill
KE3BK

On Sun, Feb 27, 2022 at 1:40 PM W2HX <w2hx at w2hx.com> wrote:

> Hi friends,
>
>
>
> I have a 28ASR with a chadless perforator/reperf. The way it is set up is
> when the K/KT/T switch is in “T” mode, it will punch tape from the
> keyboard. There is also a switch that allows the reperf to punch the tape
> from the loop. When I punch tape from the loop the perf works great. Always
> repeatable and correct. However, in KT or T mode, it is not consistent.
> Almost always there is some stuck bits. Recently it was punching all 5
> holes regardless of what I typed. And then again it will work but bit 5
> might be stuck on. But it always works great when configured in the loop.
>
>
>
> A few years ago I bought a plastic print head from K6YIC for the perf to
> install it. The procedure looks quite involved. So I got to thinkin’. I’ve
> always wanted a full chad perforator. Even if I have to deal with the
> punched chads. I think it demonstrates better and I do enjoy demonstrating
> for shack visitors.
>
>
>
> So I am wondering, maybe now is the time to swap out my perf with a full
> chad version and also install the new plastic print head at the same time?
> Can anyone tell me a few things?
>
>    1. Are the sticking bits most likely an issue with the perf mechanism
>    or the keyboard levers? If it is the keyboard, then a new perforator
>    wouldn’t help fix it
>    2. What is involved in swapping a perforator? Hard? Easy?
>    3. Where do the chads go with a full chad unit? How are the chads
>    emptied? Are there any modifications I would need to my cabinet? Anyone
>    have a video on this?
>    4. Anyone have a spare full-chad perforator for sale?
>
>
>
> I guess I could attempt to find the cause of the sticking bits, but if I
> really want a full chad unit, why not just replace it. Would seem the path
> of least resistance. But open to ideas.
>
>
>
>
>
> 73 Eugene W2HX
> Subscribe to my Youtube Channel:
> https://www.youtube.com/c/w2hx-channel/videos
>
>
>
>
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