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Old 17th December 2008, 01:43 PM   #1
skybird is offline skybird  China
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Default Please Look at my circuit

I would like to Build GG Pre-amplifier(Grounded Grid).Please look at my circuit,It can Output +200V and -200V Voltage?Any one have other better circuit?
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Old 17th December 2008, 04:24 PM   #2
Merlinb is offline Merlinb  United Kingdom
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You have connected the diodes for half-wave rectification. Full-wave rectification would give you lower noise and better regulation.
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Old 18th December 2008, 12:26 AM   #3
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Quote:
You have connected the diodes for half-wave rectification. Full-wave rectification would give you lower noise and better regulation.
Its a full wave voltage doubler. You're right about regulation but if hes powering a preamp that shouldn't take more than a few mA.
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Old 18th December 2008, 01:42 AM   #4
skybird is offline skybird  China
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Quote:
Originally posted by Merlinb
You have connected the diodes for half-wave rectification. Full-wave rectification would give you lower noise and better regulation.
How can i uce Full-wave rectification output +200V and -200V Voltage?
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Old 18th December 2008, 12:51 PM   #5
ja2dhc is offline ja2dhc  Japan
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Quote:
Originally posted by skybird

How can i uce Full-wave rectification output +200V and -200V Voltageˇ
Here is Full-wave configration. DC+/-250V is obtained if AC200V winding is used.
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Old 19th December 2008, 12:08 AM   #6
skybird is offline skybird  China
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Quote:
Originally posted by ja2dhc


Here is Full-wave configration. DC+/-250V is obtained if AC200V winding is used.
Thanks ja2dhc! But I like to use all the tubes.please lool at my another Circuit.
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Old 19th December 2008, 01:57 AM   #7
ja2dhc is offline ja2dhc  Japan
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Quote:
Originally posted by skybird

Thanks ja2dhc! But I like to use all the tubes.please lool at my another Circuit.
I believe two tubes can substitute for two silicone diodes.
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Old 19th December 2008, 01:10 PM   #8
Merlinb is offline Merlinb  United Kingdom
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Quote:
Originally posted by astouffer


Its a full wave voltage doubler. You're right about regulation but if hes powering a preamp that shouldn't take more than a few mA.
I think you are mistaken. It is a bi-polar design.
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