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Randy Rago's Discussions
Masterpiece repair project
Started this discussion. Last reply by Randy Rago Nov 8. 35 Replies 0 Likes
I'm a member / restorer at the Asheville Radio Museum avlradiomusem.org and recently connected with a customer asking to restore a relative's Sott Masterpiece.Been in the tube radio fixin' hobby…Continue
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"I have highlighted the grid leads for the Masterpiece. The two coming from the tuner case go to the 6U7 RF amp and 6L7 converter respectively. On the left (as you face the set), the first tube at front (6K7) will have a lead coming up through the…"
"New here, so im a bit lost on how to find photos. Im looking for an above pic of the masterpiece, showing the various grid lead wires. Im pretty sure there are 3 on the left and 2 from the tuning gang cover to the right tube bank.?"
"David - I will definitely keep that in mind. I see that you made a detailed post on this topic back in 2016 with photos showing how you modified the 125E transformer and mounted it on the speaker. "
"Don - when you find the correct speaker, there is a chance the output transformer primary may be half open ( I was batting about 50% on the those I have had). Your Hammond 125-E is the same I used for a replacement years ago. To adjust it for the 38…"
"Thanks for confirming this, the octal plug makes it easy to identify this speaker. Unless someone might have put an octal plug on another speaker, as you suggest. I would definitely want to verify the resistance readings. "
"Yes. The 12 inch Magnavox speaker with Scott decal having the 8 pin octal cable plug is for the Masterpiece, early 19 tube Phantom and model Sixteen (and the 18 tube varient) and is the only Scott speaker with the octal 8 pin plug. To verify,…"
"David, my set was also missing the speaker. I made an adapter using a Hammond 125E transformer so I can use an 8 ohm permanent magnet speaker. I understand the same speaker was used in the early Phantom and Sixteen sets. So if I ever came across a…"
"the pair of 6V6 tubes on the power supply are the final amplifier output tubes. "
"What are the dual 6v6's in the power amplifier for?"
"the Masterpiece audio upgrade was a pair of push-pull 6J5 drivers instead of a single 6J5 driver."
"Yes, the push pull 6v6 setup gives superior fidelity"
"Incidentally, the Scott Masterpiece has remarkably good audio. With the speaker is a good cabinet, I was impressed with the results using a CD player on the phono input. Mine in the modest sized Mayfair phono credenza.
It is basically the Scott…"
"Randy, I have the same issue. I acquired a bare Masterpiece chassis and wanted to make it look a bit more presentable and it is a work in progress, so here is my entry in the "better than nothing" category. I already had a set of 5…"
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