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Old 1st Feb 2010, 10:00 pm   #16
Ed_Dinning
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Join Date: Jan 2004
Location: Newcastle upon Tyne, Tyne & Wear, UK.
Posts: 8,194
Default Re: Cooper Smith Amplifier

Hi Gonzini, the Prodigy has the ECC83 as a pre-amp with tone controls, main amp could be considered as just the 2, ECL82's and the rect.
Feedback circuit in this one has 3n0F and a 680R, not too different from yours. Pri side of the transformer is the same.
The sec appears to have double yellow, single yellow, single red,double brown and double blue leads.
From your circuit the must be a return path for the fedback network, so I would linkyell and blue, this is the config for 15R, I would think. connect and 8R or 15R speaker to these points and see what you get. Running like this for a short time will not cause any problems, but may give increased levels of distortion.
This set may be the Cooper -Smith Bantam, but I havent located the circuit for that yet


Ed
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