I would to love see this topic continue and expand.
I would suggest some ground rules:
Start with one subject. As an example: "Baking Audio Tape". Stay within
the agreed upon subject for all pertinent discussion.
When the thread needs to change topic, add a suffix. Example: "Baking
Audio Tape - 2" tape" or "Baking Audio Tape - Binder Hydrolysis"
It will be much easier to mine the information and summarize it if we
are conscious of organizing the thread. Those who have connections
outside the list should report that information back to the thread.
Likewise, (we) should invite as many people who are not part of the list
but could contribute valuable information.
Although a forum format would be great for consolidating the
information, this list should work if the subject is well managed
because this is an archived, publicly accessible, body of information.
Corey Bailey Audio Engineering
On 1/29/2016 9:57 AM, Richard L. Hess wrote:
> This has been a great thread--and I'd like to focus on one part of it.
> Perhaps there was a different version of Ampex 456 sold into the
> Commonwealth? Could that be? Although I think all of the 456 I have
> had has come from Opelika.
> Ted in the UK, Marie in NZ, and I'm in Canada and we are all seeing
> extended baking times for 456 and related tapes much of the time.
> The problem is it's easy once you see the need for extended baking
> times to make it part of your protocol. It does no damage, whereas
> insufficient baking can create a problem.
> But, we have Tom saying he hasn't seen the need and that concurs with
> the Library of Congress's experience.
> When I discussed it with the LoC, they were quite surprised, but in
> the conversation, they indicated that all of their material was coming
> from their climate controlled vaults and had been there for extended
> I know that some of the tapes I have received from Canada, Bermuda,
> and the USA have had horrible storage profiles. I suspect that is true
> for some of the 456 etc that I have received, but the worst tape I
> ever received was a reel of 201 1-inch that had absorbed so much
> moisture it had extruded through the slot in the hub sending a bump an
> inch into the tape pack. That recording of John Allan Cameron (his
> first) was salvaged partly through my efforts and substantially
> polished by the flying fingers of Paul MacDonald in covering each
> individual blurp.
> Can we see if we can come up with enough data about baking times that
> we can better understand this increase that is not uniform?