I agree with Lou. All baked tapes go back to sticky. Putting absorbant packs and the tape in plastic
bags may mitigate the stickiness slightly longer, but I've never done scientific tests. Agree also
to let tapes cool as long as you bake them, that's the SOP as outlined by Ampex and 3M. Also agree
with other posters that baking times are increasing as time marches on.
The moral of the story is, don't start baking tapes until you have an excellent transfer chain set
up (ie a well-working/well-maintained tape deck and a good ADC, with at least a rudimentary digital
storage system in place). Then be prepared to play tapes soon after you bake them (within a day or
two of cooling cycle). And get a good transfer because there's no guarantee if you come back at some
future date, that the tape will be un-stickable.
Bottom line, buying an oven is simple. Having a good plan to bake a few hundred tapes is not as
simple. Do both before using the oven and you'll have best results. And hey, if you're doing some
interesting content, why not write an ARSCJ article about it and/or do a Conference presentation.
I'm sure many others in your shoes would love to know about your experiences.
-- Tom Fine
----- Original Message -----
From: "Lou Judson" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, February 24, 2014 12:42 PM
Subject: Re: [ARSCLIST] Recommendations - Convection ovens for baking tapes
> Hi Allison!
> Only the words are different. The time, temp, and results are the same. You are dehumidifying and
> heat treating the tapes whether you use a dehydrator or a convection oven. It is only the device
> in use for the same process that differs.
> One important detail is to not use a common household gas oven, as gas burning has H20 as a side
> effect. It needs to be dry in there, preferably with air circulation! A convection oven by
> definition uses hot air circulation, a dehydrator may need an accessory fan if the heat rising is
> not enough. That's why I like the Excalibur; they have a fan pushing air horizontally across the
> tapes, no hot spots.
> That said, I usually transfer the tapes I bake the following day, and haven't needed to go back
> and find out how long the effect holds. But six months or more later, re-baking is needed,
> according to my experience...
> Lou Judson
> Intuitive Audio
> On Feb 24, 2014, at 7:31 AM, Smith, Allison wrote:
>> Hello and thanks to everyone who has responded so far to my post -
>> I'm intrigued by the dehydrator solution. Richard, could you tell me what temperature you are
>> setting the Nesco unit to, when you bake 24 - 48 hours? Is it the lowest setting? If so, I'm
>> wondering if the dehumidification process is less stressful / radical than traditional convection
>> oven heating (higher temp for a shorter period of time) - letting the tape layers relax into
>> place more naturally/gently? Or, does this matter? Anyone done a study?
>> For those of you using the dehydrating solution - do you have a temperature/time ratio that you
>> generally use, that you would share? Will you tell me the model you are using, with the
>> How have your tapes held up post - dehumidification? Is it similar to baking - where you only
>> get a few plays before the tape needs processing again? Will they bake again if necessary?
>> Thanks so much -