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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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Thread Tools |
20th Jan 2017, 8:40 am | #21 |
Heptode
Join Date: Oct 2007
Location: Birmingham, West Midlands, UK.
Posts: 615
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Re: General question on pinch wheels
Hi Tim
I've looked at the flutter by watching a trace of a recorded tone on a scope. I was not sure if it was amplitude variation or frequency but scope showed it's frequency. It sounds like vibrato |
25th Jan 2017, 1:43 am | #22 |
Octode
Join Date: Jul 2006
Location: Perth, Western Australia
Posts: 1,965
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Re: General question on pinch wheels
If it's speed change in time with a capstan rotation then yes it has to be flywheel/bearing/capstan shaft. Confusing.
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25th Jan 2017, 9:11 am | #23 |
Heptode
Join Date: Oct 2007
Location: Birmingham, West Midlands, UK.
Posts: 615
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Re: General question on pinch wheels
Particularly as everything looks perfect. When I suspected flywheel balance wrong I managed to add weight to get it to run steadily but at 7 1/2 ips the out of balance forces shook the machine!
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