Got a model number?
Thomas of that era used tone generator that were basically flip flops or divide by two. Say high A was 1760 Hz, it was feed to a divide by 2 and out come 880, then into another and you 440, then 220 then 110. The top note could be either a independent oscillator or it could come from a TOS chip(top octave synth).
The individual oscillator type have the oscillator and its dividers all on a single board. Some dividers had two transistors and discrete parts, some had 2 transistors and a PCP(pronted circuit pack) with the all the parts. Some had PCP packs with the transistors in them and some later versions had IC dividers.
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> From: country_gentleman_tx <country_gentleman_tx@...>
>To: vintagesynthrepair@yahoogroups.com
>Sent: Thursday, June 13, 2013 3:55 PM
>Subject: [vintagesynthrepair] Thomas organ from the 70s
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>HI,
>I have been here some time ago and found great help on my Hammond B3. It is not playing GREAT! My wife has a Small Thomas from I think the 70s. She got it before we married.
>It is sort of stored. Last time it was turned on the B keys were not playing. I realize it doesn't have a tone wheel like my B-3 but is there some type tone generator or something I might find to get it back running.
>I can come back another day with model but don't have it right now.
>Any and all help appreciated.
>You can send me an amail also if you wish.
>Thanks
>Al
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