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. >________________________________ > 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 > > > > >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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Re: [vintagesynthrepair] Thomas organ from the 70s
2013-06-14 by Roger J
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