RILEY XB 30 combo
81.237.196.31 |
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| Posted on October 11, 2016 at 09:12:27 | ||
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Posts: 414
Location: Sweden Joined: December 25, 2003 |
Hallo ! This is a small combo solid state amp with two BD241 NPN powertransistors . The amp could be 30 years old ... I´d be very happy for a schematic or where to find one . It´s very timeconsuming to try to draw a schematic as some transistors is difficult to "read" . Now the amp is humming and only one powertransistor is leading current and the other is not ....... this when a speaker is connected . with no speaker connected, the + and - voltages are similar ...... balance is OK. Have a 25W/230VAC bulb ( lamp) in series with the mainvoltage to protect the amp from futher damages....
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