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| Vintage Audio (record players, hi-fi etc) Amplifiers, speakers, gramophones and other audio equipment. |
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7th Feb 2021, 11:57 am
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#1 |
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Administrator
Join Date: Dec 2002
Location: Cardiff
Posts: 8,582
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Gram motor speed indicator disk scans
This cardboard is disk approx 12cm diameter, published by Bernards and cost 10p back in the 70s.
It relies on the slight flicker of filament lamps to give the strobe effect, 50Hz one side and 60Hz the other side. Scans attached, 600DPI.
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Paul Stenning Forum Admin/Owner and BVWS Committee Member |
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14th Oct 2021, 8:24 am
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#2 |
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Pentode
Join Date: Jan 2014
Location: Alton, Hampshire, UK.
Posts: 170
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Re: Gram motor speed indicator disk scans
Thank you Paul, I was looking for a disk speed scan!
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16th Oct 2021, 10:05 pm
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#3 |
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Heptode
Join Date: Jan 2008
Location: Ashhurst, Manawatu, New Zealand
Posts: 551
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Re: Gram motor speed indicator disk scans
Works very well under one of those confounded CFL desk lamps - thanks Paul.
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Cheers - Martin ZL2MC |
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17th Oct 2021, 9:37 pm
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#4 |
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Dekatron
Join Date: Oct 2003
Location: Croydon, Surrey, UK.
Posts: 7,044
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Re: Gram motor speed indicator disk scans
They work very well under a neon lamp as well
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There are lots of brilliant keyboard players and then there is Rick Wakeman..... |
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23rd Oct 2021, 11:34 am
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#5 |
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Dekatron
Join Date: May 2010
Location: Manchester, UK.
Posts: 3,564
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Re: Gram motor speed indicator disk scans
I recently found mine languishing in a drawer.
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-- Graham. G3ZVT |
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23rd Oct 2021, 1:24 pm
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#6 | |
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Moderator
Join Date: Jun 2003
Location: Oxford, UK
Posts: 25,278
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Re: Gram motor speed indicator disk scans
Quote:
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