I've also used Naks with pressure pad lifters for many years but I
guess it makes sense that they cant hope to press a moderately
crinkled tape against the head gap as well as a good pressure pad
can. Even in a Tascam 122 Mk II or III the pressure pad doesnt
directly press the tape against the repro head gap but presses just a
little to the left (upstream) of it. This also seems to be the
reason these model Tascam cassette repro heads tend to have a long
life. The pressure pad doesnt have the same opportunity to grind away
the repro head's face. But eventually it makes a mess of the record
head next to it. I guess for a less than flat tape probably a more
conventional two head cassette deck with the record/play head
centred directly opposite the pressure pad would provide better
tape-to-head contact - at the expense of greatly increased head wear
Like some others here I've only encountered a few cassettes which
needed baking. In my limited experience they were Ampex 20+20,
another Ampex cassette type, a Denon LH90 and two unbranded cassettes
in white shells. All were helped by baking. I've also read of
BASF LH SM cassettes benefitting from baking.
A lubricant works by interposing itself between two surfaces
scraping against each other, separating the surfaces from each other
just a little. The small spacing and the lubrication go hand in hand.
I can see that with higher speed tapes such as 7.5 ips or more, a
small spacing loss might only affect the highs beyond audibility, but
with slow speed tapes, the same spacing must at some point compromise
reproduction of the highs.
I just tried a little experiment. Using tape hiss as an audible
reference, after dropping a little isopropyl onto the mag side of
the tape, the tape hiss was reduced considerably, and it only
recovered to full output when the lubricant had cleared. I guess there
has to be a trade off at some point between reducing
sticking/squealing, and spacing loss (loss of the highs).
----- Original Message -----
From: "Association for Recorded Sound Discussion List"
<[log in to unmask]>
To:<[log in to unmask]>
Sent:Fri, 13 Nov 2020 11:06:20 +1300
Subject:Re: [ARSCLIST] Drying Reel-To-Reel Tape in Food Dehydrators?
Kia ora all
I have encountered many squealing tapes in the collections I'm
on in the Archive. Be mindful they have been recorded in locations
over the Pacific so the climate, humidity and temperature has played
I have great success with baking the cassettes and leave in the oven
for at least 2 days. If really bad, I will open up the case and drip
some isopropyl over the tape. I haven't had any yet that I can't
reproduce. They are all different brands and lengths also.
Hope that helps.
On Fri, Nov 13, 2020 at 10:23 AM Corey Bailey
<[log in to unmask]> wrote:
> I've had a few cassettes that suffered from SSS. Storage seemed to
> the issue. IIRC, in all cases, lubricating the tape proved to be
> for good playback. I built an audio cassette tape lubricating
> hacking a cheap cassette transport.
> Like Lou & others, I generally use Naks for ingest. However,
> brand cassette machines seem to prefer the more expensive brands of
> & their tape tension (Factory spec.) seems low compared to other
> For this reason, I have some other cassette machines available for
> my beloved Nak(s) won't play a tape all of the way through. I
> dual capstan cassette decks for injest because they tend to have
> azimuth issues. Naks are the only brand, that I know of, that have
> lifters. Fast-Forwarding & Rewinding the cassette tape before
> will tell you if the shell works, or not. Plus, the tape gets
> The pressure pad has to be visually inspected.
> Be safe,
> Corey Bailey Audio Engineering
> On 11/12/2020 9:55 AM, Lou Judson wrote:
> > I’ve never had a cassette with sticky shed. I have seen
problems with cheap shells and possibly warping. I use Nakamichis so
the pads are not a problem (Naks lift the pad away from the head and
use dual capstan tension for better contact).
> > Have you seen evidence of shedding on the machine after playing?
or squeaking as they play? I have had cheap casstes and extra long
ones (such as C-100 and C-120) bind and slow down warbling in speed,
and usually winding forward and back helps, as well as slapping the
casstte flat on a desk to re-align the tape pack.
> > Re-shelling is not a bad thing either, just have to be careful
with all the tiny parts.
> > Richard Hess might have some deeper wisdom on this, but I have
never had a casstte need baking.
> > <L>
> > Lou Judson
> > Intuitive Audio
> > 415-883-2689
> >> On Nov 12, 2020, at 9:37 AM, Malcolm <[log in to unmask]> wrote:
> >> One of these units has been on my wants list for quite a while
along with a Keith Monks record cleaner, but in both cases life has
stepped in and said, "No, not yet. I'll get back to you." I have a
number of cassettes that display sticky shed but before baking them
I'd like to know whether there may be a problem with the shell
warping, the pinch pads falling off, etc. Taking the tape pack out of
the shell is certainly an option, but I'd rather not if I can help it.
Suggestions would be helpful. Thanks!
> >> Stay safe,
> >> Malcolm Rockwell
> >> *******
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