• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

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Hi,
Here are pictures of my new SET monoblocks with 6C33
(Borbely design).

Regards
Milan
 

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  • 6c33pic1.jpg
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no problem's yet ran it all saturday. just a small grounding problem i need to work out. i went to turn on the pre with the amp at the same time and got a little jolt nothing major but i dont
think the wife would like it:D

making some changes today

yes it does sound great for it's size.
 
The taller tube is indeed an 0A3 but the other is a bit more unusual. It's a G120/1B or CV438 (see http://www.tubecollector.org/cv438.htm). The version I have is a bit taller but it's in a deep socket which was originally for a high voltage rectifier - I'm a bit short of B4 bases. Definitely one of the nicest looking glow tubes I've seen.

If you've just worked out that 0A3 and G120 = 130v and are wondering how the 12AX7's are working at that.. Well, I also have an 0A2 tucked behind the 0A3 giving 280v in total.