Hey Jeff,
Sam Palermo, who runs Skywave Tape Deck Repair, has starting making
resin-cast new "Gear C" parts for this exact problem. It's a huge issue
with the Tascam 122 MKIIIs. The same thing happened to my cassette deck.
You can get more info on getting the part here
<http://s609729863.onlinehome.us/tascam-122-mk-iii-and-other-models-112-and-so-on-gear>.
He is very active in the Tapeheads forum, and there are a few threads there
where they discuss how to replace the gear and troubleshoot the problem. Here's
a thread <http://www.tapeheads.net/showthread.php?t=51681> where someone
documents the replacement procedure with photos.
There are also ebay sellers who have the gear from time to time. There's
one now
<https://www.ebay.com/itm/TASCAM-122MK3-122MKIII-112MK2-112MKII-112RMK2-488MK2-NEW-GEAR-C-9278377600/301966434918?hash=item464e9a2266:g:sAkAAOSwLnBX2HJL>,
but I've seen various listings for lower and much higher prices at
different times.
Just a warning, I did replace gear C (and the idler tire) in my deck, but
it did not resolve the problem. It was definitely part of the problem,
because the gear was cracked and broke when I opened up the deck. However,
there also ended up being a capstan motor issue and was more than I wanted
to take on. C'est la vie.
--
Melissa Widzinski
Audio Preservation Engineer
Media Digitization and Preservation Initiative <https://mdpi.iu.edu/>
Indiana University
On Tue, Nov 14, 2017 at 3:46 PM, Tim Gillett <[log in to unmask]>
wrote:
> From memory there are actually three plastic cogs in the Mk III, all of
> which can get brittle and the teeth break off. It might be worth replacing
> all three if they're obtainable.
>
> Interestingly, the earlier Mk II model used a rubber belt drive system
> which belt needed occasional replacement but it's a fairly generic part. I
> wonder for how long these special cogs for the Mk III will be easily
> obtainable...
>
>
> ----- Original Message ----- From: "Jeff Willens" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Wednesday, November 15, 2017 1:50 AM
> Subject: Re: [ARSCLIST] Tascam 122 Mk3 - Logic or Mechanical problem?
>
>
> Yes, that's what I was hoping it would be. At least I can fix that.
>
> Thanks Marie and Jeff.
>
> ---
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