Ok I got a dusey. I am rebuilding a 333 watt Dukane 1A833 power amplifier. This is a 1970's model. I am basically doing a cap replacement, changing the rectifiers, and the output transistors. This is a push-pull amplifier with '20' 2N3055 transistors for the final drive section. The 2N3055 transistors in the amplifier are of a 1970's vintage. Before rebuilding I am performing signal checks and the amplifier responds perfectly. When I replace the old 2N3055's with new beta matched 2N3055's the amplifier will not function. With the old transistors I can achieve a beautiful sine wave up to 75VAC. With the new transistors my output collapses at approximately 13VAC.
Are there differences between two different vintage 2N3055 transistors?
If so, what are they and how do I rectify the problem, thank you?
Are there differences between two different vintage 2N3055 transistors?
If so, what are they and how do I rectify the problem, thank you?