Tube Amplfier HV Supply Control Circuit

DonH50

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Jun 22, 2010

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• Apr 16, 2013

• #1

An interesting and somewhat amusing read for techies:

http://www.edn.com/electrical-engineer-community/industry-blog/4412053/1/Audiophile-heaven

 

microstrip

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• Apr 16, 2013

• #2

DonH50 said:

An interesting and somewhat amusing read for techies:

http://www.edn.com/electrical-engineer-community/industry-blog/4412053/1/Audiophile-heaven

Click to expand...

I think this guy would be afraid of living in Europe or any where having 230V mains - any device working with mains has a peak voltage of around 320V!

 

DonH50

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• Apr 16, 2013

• #3

I was weaned working on TVs and old tube radios. Those CRTs had 20 - 40 kV on them. Low current, but I still have a few burn marks and a scar or two from hitting other things when my hand jerked after catching the anode lead. The B+ in my old power amp was 600 V. But, my favortie tale is when I worked with a lineman friend; nothing like 440 kV feeder lines to keep you on your toes. One time he (not me, thankfully) dropped a large (8') crowbar from the bucket and it fell flat across the transformer bus lines in a substation we were repairing. There was a loud pop/snap/sizzle and the crowbar simply fell right through the lines, only now it was in four pieces. Didn't even trip a breaker.

 

Julf

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• Apr 17, 2013

• #4

Heh, first he states "I could almost certainly achieve the same sound for less money and effort if I used solid state. That would be cheating. And it wouldn't be nearly as cool", and then he goes on to use not just semiconductors, but microcontrollers in his "tube" amp...

 

DonH50

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• Apr 17, 2013

• #5

The irony is indeed heavy...

 

opus111

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• Apr 17, 2013

• #6

He seems not to understand just why he prefers the sound of tubes - after all he's claiming SS can sound just as good, for less money. But seeing as he's saying that SS is more linear, I very much doubt his bravado claim SS is only 'more linear' in the traditional measurements of THD and IMD, not where it matters for music.

 

microstrip

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• Apr 17, 2013

• #7

Thinking better, the real main subject in the article is not about SS, tubes or electrocution - it is just about do-it-yourself in audio.