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No mains transformer B+ ?
No mains transformer B+ ?
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Old 14th March 2007, 10:19 AM   #1
Salas is offline Salas  Greece
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No mains transformer B+ ?
Default No mains transformer B+ ?

I have a quartet of RCA 6V6G dark glass NOS. Having a 230V AC outlet I wonder if there is something negative into rectifying directly to 300-320VDC and powering some some possible 6V6G amp with it. Transformers help a little with mains grunge also, but apart from that, have you tried it? Is it a good practice not to use a transformer when AC gives compatible voltage to rectify for needed B+ by luck?
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Old 14th March 2007, 10:22 AM   #2
phase_accurate is offline phase_accurate
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Quote:
Is it a good practice not to use a transformer when AC gives compatible voltage to rectify for needed B+ by luck?
It is only good practice if you don't mind getting killed by your amp !!!

Regards

Charles
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Old 14th March 2007, 10:25 AM   #3
Salas is offline Salas  Greece
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No mains transformer B+ ?
Elaborate please.
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Old 14th March 2007, 10:37 AM   #4
arnoldc is online now arnoldc  Philippines
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It's all about safety! You would want to isolate your circuit from the mains.

Soon, the safety patrol will gang up on you
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Old 14th March 2007, 10:41 AM   #5
Burnedfingers is offline Burnedfingers  United States
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If I understand you correctly you want to take your main power AC feed and rectify and filter it to DC without the use of a transformer.

Do you enjoy life? This is very stupid! Never, never, even consider trying something like this!
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Old 14th March 2007, 10:44 AM   #6
Salas is offline Salas  Greece
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No mains transformer B+ ?
Can't a 230VAC 1:1 transformer with 0.3A capability kill someone touching a 320V B+ all the same?
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Old 14th March 2007, 10:50 AM   #7
phase_accurate is offline phase_accurate
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From a legal point-of-view there might be quite a difference between being killed or being killed all the same !


If you rectify your mains directly then a wall outlet that is wired the wrong way around is actually all it takes to kill you.

Regards

Charles
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Old 14th March 2007, 10:54 AM   #8
Burnedfingers is offline Burnedfingers  United States
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Salas

Is you life worth the cost of a transformer? If not then I highly suggest that you sell the tubes and anything else associated with building an amplifier.
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Old 14th March 2007, 10:55 AM   #9
Salas is offline Salas  Greece
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No mains transformer B+ ?
OK then, I will not do it, bcs if an outlet is wrong there will by no transformer to fry, but the first one who touches the RCA plug. Got it.
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Old 14th March 2007, 11:04 AM   #10
Salas is offline Salas  Greece
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No mains transformer B+ ?
Quote:
Originally posted by phase_accurate
From a legal point-of-view there might be quite a difference between being killed or being killed all the same !


If you rectify your mains directly then a wall outlet that is wired the wrong way around is actually all it takes to kill you.

Regards

Charles

I will get a 230VAC 1:1 toroid, Audio Note 8KPP OPT and make an Audio Tropic musical machine, I am not giving my RCA 6V6Gs to nobody!
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