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 Post subject: Thordarson T20W15L amplifier
PostPosted: Oct Sun 22, 2006 8:23 am 
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Joined: Oct Sun 22, 2006 8:20 am
Posts: 1
can anyone tall me about these, other than the tube lineup

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PostPosted: Oct Mon 23, 2006 1:50 am 

Joined: Jan Thu 01, 1970 1:00 am
Posts: 2070
Location: Lakewood, California
Perhaps you did not see my reply to your post about this amp on the Nostalgia Air Forum?

I have copies of the schematics, technical data, construction drawings, and parts lists for 2 sllghtly different T-20W15 Thordarson amps as mentioned on the other forum. They are yours for the postage required to send them.

Quote: I found a Thordarson T20W15 (no "L") in Riders 1948 PA manual, Thordarson pages 1 thru 4. This amp uses 2-6V6G, 2-6J7, a 6C5, and 5Z3 rectifier. This amp uses the following transformers and chokes:
Power trans. T40675
Output trans. T40677
Driver trans. T-40647
1st. choke. T-40676
2nd. choke. T-40649
In Thordarson's Amplifier Guide 346-D, copyright 1941, there is a very similar amplifier, titled only as "15 Watt Amplifier". This amplifier uses the same tubes, but different number transformers and chokes:
Power trans. T-15R06 or T-70R62 (first number is potted type)
Output trans. T-15S90 or T-17811
Driver trans. T-15A74
1st. choke T-15C54
2nd. choke T-67C46

I can send you a copy of the information in both books; just need your mailing address. Send me an email." Unquote.


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