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vintage code practice oscillator repair

May 17th 2018, 23:04


Joined: Nov 13th 2015, 01:35
Total Topics: 0
Total Posts: 0
Hello all, I haven't been a Ham long but my hobby is collecting vintage code practice oscillators. I have an Ameco CPS, a TAC MS-710PR with a built in J-37 key,an ICA signa-tone 4300 and a couple of Ameco OCM-2's. I am planning to replace the audio transformers in the tube units. There is very little info on these units so I really have no idea what transformer to use.The ICA 4300 uses a 117L7/M7-GT tube and the Ameco uses a 50C5 tube. The transformers are relatively small units that are secured to the chassis top with screws.Can anyone give me some guidance on what transformer would be the best to use? Thanks.

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