Question about Sherwood RX-4105 Receiver
Posted by Anonymous on
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Posted on Jan 02, 2017
You can also use 2SD2560 and 2SB1647 130watt 150volt 15amp transistor, but it may require some rebiasing the on output transistors. Sherwood have used these transistors in their older model receivers. I just replaced those transistors in my Sherwood RX-4105 Receiver, and they work good as well.
Before I install those transistor. I did a out of circuit 20volt 4amp DC current test to a 4ohm resistor @ 200watt load to compare 2SD2560 / 2SB1647 to the B2510/B1510 mounting them on 5 square inch, 1/8" thick piece of Aluminum, and the results of the test, the 2SD2560 / 2SB1647 heats up in 60 seconds to around 120 degrees F, and the B2510 and D1510 heats up in 30 seconds to around 120 degrees F.
Posted on May 04, 2009
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