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Author Topic: HV PS rectifier/filter board  (Read 1346 times)
NORTHCOUNTRY
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Posts: 358




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« on: August 13, 2007, 09:20:57 AM »

Sorry if this is a redundant post, but...

Anyone have a schematic for this HV PS rectifier/filter board.  I am confused about the values for R12 thru R21.

By the way my meter is 50uA, F. S.

http://www.farcircuits.net/HVPS2.pdf
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KA5N
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Posts: 4380




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« Reply #1 on: August 13, 2007, 11:01:30 AM »

The parts list for the PCB is given in a table at
http://www.farcircuits.net/power2.htm
with the part numbers and source (Mouser etc.)  105 degree caps usually have longer life than 85 degree units particularly at higher temperatures.
You can draw a schematic with the info on the PCB and in the table.  The resistors for the meter circuit have to be calculated for the particular meter meter used. So if you want the full scale to be 5000 volts then the resistance would be 5000volts/50 uamps = 100 megohms total divide by the number of resistors for the value of the individual resistor.  Quarter or half watt resistors ok.  
Allen
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NORTHCOUNTRY
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Posts: 358




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« Reply #2 on: August 13, 2007, 11:03:30 AM »

Thanks, thats fine for R13-R19 but what about R21?
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KI4NX
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Posts: 121




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« Reply #3 on: August 13, 2007, 11:53:32 AM »

Values for R13-19 are provided in the parts list. The value for R21 is what Allen provided above.

GL
Ken
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