08-18-2025, 08:51 AM
Hello Pete, welcome to the Phorum. We're all a little incomplete here but in most cases we seem to put together enough information to have progress. An ARF referral, I didn't think we had that kind of reputation.
So, it looks like you're on the right track with that output transformer (opt). I usually test all the coils and transformers at the start of a restoration in case there's a need to fix ot replace one. You'll want to find a transformer primary with around 10k ohms impedance. If you have one at 7k then it will do in a pinch. All you're looking for at this point is some noise. Keep the volume to a minimum. Any p/p transformer from a chassis with 6F6s will work perfectly. If you check the 42 tube characteristics it says the plate impedance is 7k - 10k. The 6F6 is 10k.
People with 16X experience will chime in shortly with all kinds of stuff to do. Show us some pics and good luck with your restoration.
So, it looks like you're on the right track with that output transformer (opt). I usually test all the coils and transformers at the start of a restoration in case there's a need to fix ot replace one. You'll want to find a transformer primary with around 10k ohms impedance. If you have one at 7k then it will do in a pinch. All you're looking for at this point is some noise. Keep the volume to a minimum. Any p/p transformer from a chassis with 6F6s will work perfectly. If you check the 42 tube characteristics it says the plate impedance is 7k - 10k. The 6F6 is 10k.
People with 16X experience will chime in shortly with all kinds of stuff to do. Show us some pics and good luck with your restoration.
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