Quote:
Originally Posted by cmjones01
Quote:
Originally Posted by knobtwiddler
I don't have a micrometer (probably should buy one!), but I have a couple of Verniers. I also have an original ABEX gauge. If there is a particular dim on the gauge you'd like verified against the ABEX THG-801, I can check?
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The thickness of the back plate would be very interesting to know. Mine measures 2.40mm, but I have seen measurements of the THG-801 which indicate that it's 2.45mm thick, like on this page (in Polish): https://serwisvintageaudio.pl/2019/0...ontra-thg-801/
This is interesting because the difference I observed between "correct" and "wrong but plays tapes from my Technics deck properly" is about 0.07mm, so if my gauge was 0.05mm thicker I'd probably not have noticed the problem. That said, if such a small change makes such a difference the head is clearly right on the edge of the track anyway, so it's probably not relevant. But my calculations (assuming cassette 8.61mm thick and tape 3.81mm wide) come out to a back plate thickness of 2.40mm. Who's right here? Certainly not my tapes...
Not that one in particular, no, but similar things, and it confirms the way I've been using the gauge at least 
Chris |
Sorry for the slow progress on this. My ABEX 801 measures 2.38mm - but I emphasise that I used a Vernier, not a micrometer (which I can't believe I don't have...). The Vernier zeroes nicely to 0, but it's a mid-price one, not Mitutoyo. I find that Verniers always measure around 0.02mm less, as you have to hold them with your thumb. It could well be 2.4mm with a micrometer. Will ask my neighbour if he's got a micro I can check with...