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Other Vintage Household Electrical or Electromechanical Items For discussions about other vintage (over 25 years old) electrical and electromechanical household items. See the sticky thread for details. |
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24th May 2023, 9:55 pm | #1 |
Heptode
Join Date: Aug 2009
Location: Carshalton, Surrey, UK.
Posts: 734
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Harmonics Organ and divider ic's
Hi,
I'm working on repairing an old Harmonics Organ which uses the obscure MA60 divider ic's and a more familiar top octave generator. the Ma60 dividers are similar to a to5 case but have ten legs, does anyone have any info on them ? the rest of this 2 manual Electronic Church Organ uses transistors and the manuals use diode keying.
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Regards Peter B |
27th May 2023, 1:17 pm | #2 |
Octode
Join Date: Jul 2009
Location: Cheshire, UK.
Posts: 1,733
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Re: Harmonics Organ and divider ic's
Page 72 here has info on the Marconi-Elliott MA60 divider IC, seems to contain six binary dividers, as two chains of three dividers, with divide by two, four & eight outputs for each chain. It uses -26V but is compatible with regular TTL/DTL logic.
https://worldradiohistory.com/UK/Pra...cs-1971-04.pdf David |