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Old 15th December 2011, 11:37 PM   #1
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Default Big Champ head

I'm still a newbie here but not to amp building. I'm not a musician either. However I have freinds that are. Both guitar and harp.

They've told me the like to practice with the Champ but need more power for giging.

I allways wanted to try an 813 SE so why not? It was se like the champ and a pentode.

The power amp section is from a schimatic hyjacked from the internet. The preamp section is Fender B/T. The plate supply runs at 780 v. I've got DC on all heaters ( its dead quiet).

Its doing a clean 20 watts. Then it gets dirty the way thre like it. I'll try to get one of the players to discribe its preformance in musician terms soon. There all outa town for awhile. Big iron on this thing. It is 35LBs heavy.

I'll try to load a couple pictures here. Wish me luck.

Jerry
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File Type: jpg my crystal set coils 651.jpg (102.7 KB, 84 views)
File Type: jpg my crystal set coils 652.jpg (103.4 KB, 81 views)
File Type: jpg my crystal set coils 655.jpg (105.2 KB, 80 views)
File Type: jpg my crystal set coils 968.jpg (132.7 KB, 81 views)
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Old 16th December 2011, 12:17 AM   #2
Enzo is offline Enzo  United States
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Oh dear lord, that's a Champ?


I am reminded of V-ger from the first Star Trek movie.
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Old 22nd December 2011, 06:06 PM   #3
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I have been looking for an excuse to build this:


The 833A SE Amp Prototype
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Old 23rd December 2011, 12:32 AM   #4
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Quote:
Originally Posted by tubelab.com View Post
I have been looking for an excuse to build this:


The 833A SE Amp Prototype
Wow. Thats a bigen. What kinda #s you gettin from this beast.

Must be keeping the lab warm. More info please?

Jerry
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Old 23rd December 2011, 12:36 AM   #5
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Quote:
Originally Posted by tubelab.com View Post
I have been looking for an excuse to build this:


The 833A SE Amp Prototype
OK I checked the link. Simply amazing, awsome.

Jerry
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Old 23rd December 2011, 03:44 PM   #6
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I wired all that stuff together one day just to see what would happen. It cranked out about 200 watts and could be heard from 2 blocks away. I had it on my bench for about a week, then took it all apart since it took up the whole workbench. That was about 5 years ago and I never got around to building it permanently.
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