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Old 22nd February 2012, 10:38 AM   #41
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Old 29th February 2012, 04:57 PM   #42
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Old 29th February 2012, 05:10 PM   #43
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Old 29th February 2012, 06:55 PM   #44
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Old 1st March 2012, 07:23 PM   #45
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it looks rough but hopeefully it will work

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I think the project may not be interesting. If the moderators think I am bumping a useless thread I can stop posting.

Here is the results from anlysis of PSU requirements and board configurations..

voltages supplied:

1. +500v
2. +300v
3. +150v
4. +1600v
5. +600v
6. -150v
7. -300v

1. 500v

866A in full wave. Choke loaded: 5H 53ohms. 235uf

suggested: 500v CT

2. +300v

866A in full wave. Choke loaded 5H 53 ohms 470uf

suggested: 300v CT

3. -300

SS (1n5408) full wave. 900uf

suggested: 220v CT

4. +150/-150v

SS in full wave (either way) 900uf

suggested: 220v CT

5. 1600v

SS (2x1N4007) full wave 235uf

suggested: 1,3kv

6. 600v

rectifiers choke loaded 10H 65ohm 2350uf

suggested: 740v CT

In some cases the boards have 22kohm bleed rsistors (for 3 reasons: safety, min. load for tubes and constant blue glow )

as far as the rest of the voltage go...I have simulated max load. 1600v will be with 1A load and 1800v at idle. caps will be 10 caps in 2x5 caps series banks.

just a question. what would be a good value for balancing resistors for the 1600v line caps?

Thanks
alex
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Old 2nd March 2012, 11:27 AM   #46
chrish is offline chrish  Australia
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If you stop posting, the assumption will be that you have electrocuted yourself.
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Old 2nd March 2012, 01:15 PM   #47
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thanks for the vote of confidence. I guess I did not convice anyone of either my resolve or attention to safety
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Old 2nd March 2012, 04:53 PM   #48
wicked1 is offline wicked1  United States
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Keep posting!
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Old 2nd March 2012, 06:00 PM   #49
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big problems with layout. The large 10H choke is larger than expected...will have to make room for 6 3b28 type (4 pin) sockets. Clearance with the gu81m sockets is an issue as well..
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Old 2nd March 2012, 11:48 PM   #50
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Quote:
I think the project may not be interesting.
I find it interesting. I for one would have liked to go down that road with 833A's but lack of time, money and suitable OPT's killed that project. I am slowly selling off the stuff I collected for the transmitting tube amps. I will still make a several hundred WPC amp with TV tubes because I already have the iron.

Quote:
I guess I did not convice anyone of either my resolve or attention to safety
There have been several threads about really big amps, but very little actual construction......Especially construction with pictures....Consider me convinced. Keep posting the pretty pictures, I have looked at every one. Do have someone else present when you flip the big switch. If all is well they can take pictures, if not......
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