I finally received my Jian Shin (James) output transformers from Taiwan. They look very nice. They are described as an improvement on the JS-6123/JS-6011 model. Following are the specifications:
They are rated for 20W (30W max)
3.5k ohm primary with screen winding
Secondaries are 4, 8, and 16 ohms
I'm confused regarding the primary hookup to the GSG with 6B4G output tubes. I think the B+ wire goes to J7 and the Plate wire goes to pin 3 of the 6B4G, but should I do anything with the screen grid wire? Should I just cap it off with a small wire nut and tuck it out of the way?
By the way I had an aluminum top plate made by Front Panel Express and it is beautiful! Tomorrow I'm going to my wood-worker friend's house to make the base. I'll post pics in the next week or so.
Thanks,
Bill
Output Transformer Help
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Output Transformer Help
by MashBill » Sat Feb 21, 2009 12:07 am
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MashBill - Posts: 63
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by WA4SWJ » Sat Feb 21, 2009 6:26 am
Bill,
You're correct - just cap it off. It's not needed.
I've built some amps with Front Panel Express panels too and they are indeed beautiful. I must have spent enough money with them because they sent me a chocolate bar in the shape of a panel for Christmas. They do an excellent job.
Good luck with the amp and looking forward to the pictures.
Regards,
You're correct - just cap it off. It's not needed.
I've built some amps with Front Panel Express panels too and they are indeed beautiful. I must have spent enough money with them because they sent me a chocolate bar in the shape of a panel for Christmas. They do an excellent job.
Good luck with the amp and looking forward to the pictures.
Regards,
Ed Long
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WA4SWJ - KT88
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by Ty_Bower » Sat Feb 21, 2009 5:47 pm
There was a guy on eBay who had nine pair for sale. They're gone now. Wish I had grabbed a set...
"It's a different experience; the noise occlusion, crisp, clear sound, and defined powerful bass. Strong bass does not corrupt the higher frequencies, giving a very different overall feel of the sound, one that is, in my opinion, quite unique."
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Ty_Bower - KT88
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by MashBill » Sat Feb 21, 2009 6:50 pm
Ty is correct. The seller is no longer on ebay. He started out with 15 pair. I bought 2 pair from him. He also had the best octal tube sockets I have ever seen. I bought 4 of those too. He was easy to deal with and had very positive feedback. Maybe he will return sometime in the future.
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MashBill - Posts: 63
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