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40-190 Output Transformer
#3

Just a couple of more things to check before you fire this one up again, check the two output tubes (type 41) for shorts or evidence of arcing at the tube sockets, and then bring the set up slowly with a variac and monitor the B+. If there is a short in either of the output tubes, or arcing at the tube socket, your replacement output transformer will be in peril. Just for fun, you can carefully open up the old output transformer, and see if the "open" is just a lost connection, or a burn out caused by excessive current. I have seen quite a few cases where the connection of the fine primary windings to the cloth covered leads corrodes, or arcs to the transformer casing, and sometimes this can be fixed. Since this is a push pull transformer the primary is center tapped and you may have continuity in only half the winding. If you do have some contiuity and no shorts to the metal casing, save the transformer. You may need it someday to replace a burned out choke.


Messages In This Thread
40-190 Output Transformer - by Bob - 11-05-2008, 06:50 PM
Re: 40-190 Output Transformer - by planigan - 11-05-2008, 11:24 PM
Re: 40-190 Output Transformer - by codefox1 - 11-08-2008, 12:46 PM
Re: 40-190 Output Transformer - by Bob - 11-08-2008, 03:46 PM



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