I used to bake 15" quad reels with a high degree of success at 120F for 24
hours, with a long ramp down time of another 24 hours before handling it.
Knowing what I know now, I might go as high as 125F. 54C (130F) seems high
Nixon Presidential Library and Museum
National Archives and Records Administration
On Wed, Jan 27, 2016 at 8:38 PM, Corey Bailey <[log in to unmask]>
> Hi David,
> My experience with baking 2" tapes comes from my experiences at Warner
> Bros. Studios, Burbank, CA. As Richard Hess said: "456 is the poster child
> for SSS" so, don't ask, just bake it.! Regarding the question of how long
> to bake is dependent on the size and type of oven, the number of tapes to
> be baked at one time and (obviously) the condition of the tapes themselves.
> The oven at WB is commercial grade, capable of baking 34, 10.5" reels at a
> time. I've baked as few as two reels on up to an oven full. For two reels
> of 2", the average baking time is 18 - 24 hours. I would suggest that you
> only bake as many tapes as you can process in a day so that the
> stabilization process is as fresh as possible. You mentioned leader breaks.
> Expect any splices to have to be replaced after baking. Not always the case
> but, build the labor cost into your budget.
> Corey Bailey Audio Engineering
> On 1/27/2016 8:29 AM, David Crosthwait wrote:
>> Hello Tom and Richard,
>> In my digging through a church archive yesterday with new clients, we
>> uncovered many reels of 24 track on 2" among other audio tapes. One tape of
>> interest I have with me, destined to a comrade here in town who is as
>> passionate about vintage audiotape recovery as we are with videotape, is a
>> 24 track on "Ampex Grand Master" 456 from 1988 in a cardboard box. It has
>> track assignments within. The tape has leader breaks. In a test of sorts,
>> we are going to link this up with a 1" C of the concert (same production,
>> same date) to create a new stereo mixed version. I've done this before so I
>> am familiar with the routine. The question to you two (and others) is: What
>> should we expect from a stickiness standpoint (if any) from 1988 vintage
>> "Grand Master" 456?
>> The client has multiple reels of this concert so this is a test of sorts.
>> The 24 track will create a ProTools session for the mix down and new stereo
>> imaging (5.1?), to be done at the client's facility. I'm going to be
>> remastering the 1" C today to file (it too is in stereo albeit with weak
>> L-R imaging as viewed on the phase scope). It's a full orchestra with choir.
>> Thank you.
>> Best Regards,
>> David Crosthwait
>> DC Video
>> Transferring NTSC, PAL& SECAM Two Inch Quad and Helical Source Tapes
>> (and More)!
>> [log in to unmask]
>> Follow DC Video on Facebook: https://www.facebook.com/dcvideo
>> Follow DC Video on YouTube: http://www.youtube.com/user/dcvideoonline