Stone Vintage Radio Museum - Antique Radios, Wireless, Crystal Sets, Tubes, and Valves

8417 Audio Amplifier Which i built the summer of 2009. The output transformers are huge but of unknown maker. The OPT are 4 X 4 1/2 X 5 inches. It is designed so that I can make the shift to 6550 tubes with little modification--thought I have not tried it yet.

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