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Vintage Tape (Audio), Cassette, Wire and Magnetic Disc Recorders and Players Open-reel tape recorders, cassette recorders, 8-track players etc.

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Old 16th May 2020, 4:35 pm   #61
Andrew2
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Default Re: Predicted life of audio recorded on magnetic tape

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Originally Posted by dave walsh View Post
Honestly, I really have no connection with Greg Milner's 2009 book [post 8*] but if you are interested in the German origins of audio recording during WW2 it's a great investment for that alone and everything else.
The layout is not that linear but that can be an advantage.
The style has caught on-see "1, 2, 3, 4 The Beatles In Time" by Craig Brown [just out] and of course, Chronicles Bob Dylan 2004!

Dave W
Funnily enough I've just read that section and it is a fascinating part of the book. On the whole the book so far has been very good, although some of Greg's philosophising is a bit annoying and some of the quotes re valve vs solid state mixing desks from people who really should know better are puzzling to say the least. Still a great book though.
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Old 16th May 2020, 5:58 pm   #62
Ted Kendall
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Default Re: Predicted life of audio recorded on magnetic tape

And one of his assertions is plain nonsense. The two K4s Mullin found at Frankfurt were not the only "sanctioned" AC bias machines in Germany - RRG had been running AC bias across the network since 1942, and the RRG stereo machine was also AC bias. This journalistic glossing-over of points the author doesn't understand is not uncommon, and erodes trust in the rest of the work.
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Old 16th May 2020, 7:17 pm   #63
dave walsh
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Default Re: Predicted life of audio recorded on magnetic tape

Snap Andrew! I take your point Ted but I still like the book overall. There was something he mentioned or I found when going through one of the Bletchley books that I couldn't [trace relating to one of the German recorders I think]. I'll get back to you for advice, if I can find out what it was-I wrote it down somewhere Thanks for the update Barretter. It sort of confirms my comment about a need for a more central integration. The NSA had an outpost, not in "that London", but Clitheroe Castle... circa 1983!

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Old 16th May 2020, 10:22 pm   #64
Bazz4CQJ
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Default Re: Predicted life of audio recorded on magnetic tape

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is a food dehydraytor, preferably supplemented by a temperature probe. The window is fairly narrow - below 50C, not much happens, but sustained 55C or above can cause noticeable print-through. Baking time used to be about 24 hours for a quarter inch reel, but this has gradually increased to several days.
I guess that the ideal device would be a vacuum oven, fairly common-place in chem labs and I have one in my garage, left over from the days when I was a productive member of society. Basically, this allows you to warm anything to specific temperature while under a vacuum, or partial vacuum, so is a much more effective approach than using a desiccant. I'd guess that you could probably achieve drying at temperatures appreciably below 50'C.

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Old 16th May 2020, 10:33 pm   #65
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Default Re: Predicted life of audio recorded on magnetic tape

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Thanks for the update Barretter. It sort of confirms my comment about a need for a more central integration. The NSA had an outpost, not in "that London", but Clitheroe Castle... circa 1983!

Dave W
It seems that the sound archive at Clitheroe Castle was the North West Sound Archive, a collection of recordings relating to life in the North West and not connected to the National Sound Archive as such.
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Old 16th May 2020, 10:58 pm   #66
dave walsh
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Default Re: Predicted life of audio recorded on magnetic tape

Oh dear. Thanks for that Barretter. A bit Monty Python eh? Not the "Peoples Front of Judea" but the "Judean Peoples Front" It still makes my point though

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Old 12th Jun 2020, 11:40 am   #67
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Default Re: Predicted life of audio recorded on magnetic tape

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I've wrapped a sticky tape in some paper towel, and put it in a container of rice. I'll leave it a couple of weeks, and see how it goes.
I gave it a month in the rice(without the paper towel), and it has improved quite a bit. There was still a bit of a sticky patch, but it didn't affect play that I noticed.
I don't know how long it will be good for, but I've got a digital copy of it now, so the recording is saved.

This was only a small tape, one of those World Record Club recordings, so I don't know how it would be on something larger like a 7 inch reel.
I have a particularly nasty 7 inch AGFA which I will try in the rice once I find a large enough container.
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