I would consider baking the blue reel tapes. Although I save baking as a
last resort, layer-to-layer adhesion usually requires careful baking.
You may want to lubricate the red & green reels if you have any kind of
oxide issues at all, including having to clean the transport more than
Although you are a professional & plenty qualified, you may find some
useful information in two articles that I wrote:
Corey Bailey Audio Engineering
On 11/2/2020 4:17 AM, Shai Drori wrote:
> Hoping to find some answers from the group about a problem I am facing. I'm
> digitizing a few hundred Nagra SN tapes. These are reel to reel tapes in
> the width of a cassette. There are three lengths, red, green, and blue
> reels, with blue being the thinnest and longest tape
> the red and green tapes play fine but the blue tapes are stuck so each
> layer is glued to the layer before it. When I try to play the tapes they
> squeal and the magnetic particles sometimes are removed from the base and
> stay stuck to the back of the layer before. These tapes are not
> black-coated and resemble really thin c-120 cassette material.
> Any suggestions are welcome.
> Shai Drori
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