The recorder was my father's, and I don't think he recorded over previous recordings.
But, yes, the erase head was a permanent magnet. The noise level was no doubt due
to the electronics and would certainly be higher than with a more modern recorder.
Date: Mon, 29 Oct 2018 22:26:55 +0800
From: Tim Gillett <[log in to unmask]>
Subject: Re: Soundmirror tapes
It seems then that so far, the sticking winds is an isolated case.
I mentioned earlier that the very high noise floor seems confined to the
actual recording. I suspect the machine used initially (early 1950's) was a
Soundmirror which apparently used a permanent magnet erase head. When I
made a new recording on an unused piece of the paper tape, on a modern era
machine (Nagra 4.2), the noise was much lower than on the original
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