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19th November 2007, 07:44 PM
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#1 |
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diyAudio Member
Join Date: Jun 2004
Location: mid Ohio USA
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Transistor replacements
Hello
I am currently doing a rebuild on an old amp. Many of the transistors that were used are no longer available. I already have MJ21195/ 21196 for the outputs and MJE15030/15031 for the drivers. I already had some possible replacements in mind for the others but I wanted to get some recommendations from you guys first before ordering anything. The B+ voltage in this unit is about 60 volts. Below is a schematic of the amp and a transistor list with the original numbers. There are also links so you can see the specs of the original transistors. Thanks. |
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19th November 2007, 07:48 PM
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#2 |
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diyAudio Member
Join Date: Jun 2004
Location: mid Ohio USA
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Here is a parts list and links to get the datasheet
for the original transistors. Data sheets for originals. 2n4889 http://www.datasheetarchive.com/specsheet/2N4889.html BF257 http://www.datasheetarchive.com/preview/851284.html BC308B http://www.datasheetarchive.com/preview/826504.html SE6020 http://www.datasheetarchive.com/preview/3046941.html MPSA20 http://www.datasheetarchive.com/preview/2452852.html BC237 http://www.datasheetarchive.com/preview/825546.html |
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