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 NEW  Matt presents bias and operation data for the 6V6 tube in SE operation - 6V6 Single-Ended (SE) Ultra Linear (UL) Bias Optimization.

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It is currently 24 Jun 2019, 17:48

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 Post subject: 833C PP HiFi mono blocks
PostPosted: 03 Sep 2017, 16:20 

Joined: 30 Aug 2017, 09:49
Posts: 37
I just received some new 833C triodes from a fellow Ham. I was thinking of doing a pair of mono block 833 Amps. I was thinking of using the same preamp and driver circuit that I use in all my 813 PP amps and adding a 6550 to drive the 833's. I was thinking of using lower hv on the 833 plates of 900 to 1000 volts. I can get 12K OPT's rated at 300 watts. I get them from a local place.That does custom work. The only problem I can see is my Wife. I do not know if she Will let me use them in place of the 813 amp I use now.

Alpha Wolf

PostPosted: 03 Sep 2017, 19:27 
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Joined: 08 Aug 2009, 03:11
Posts: 2229
Location: Chilliwack, BC
WAF is easy... make it pretty with hardwood and protective acrylic (fan needed) or chrome cages.

The tubes themselves lend to WAF because they glow orange in normal operation - no LED's needed! :D

IMHO, run them at 1200-1500 for audio. 900-1000 just isn't enough for the righ sound unless you go 845.

There are better "brute amp" experts here, though, that may have loadlines ready.


-= Gregg =-
* Ratings are for transistors - tubes have guidelines*
Home: GeeK ZonE
Work: Classic Valve Design

PostPosted: 10 Sep 2017, 18:40 

Joined: 29 Apr 2017, 15:14
Posts: 43
your wife is a pretty smart lady, stay away from them there high voltages,
it will serve you well.

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