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Old 19th March 2005, 05:51 AM   #1
Htguy is offline Htguy  United States
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Default Modified Jung regulator...

Hi,

I am looking into replacing the power supply to my denon dvd 2900 and some other components and I was wondering how the Modified Jung pcb's would work for this?

Does anyone hav information on how to set the voltage output on them? WHat is the max current that can be pull through them?

Thanks

God bless....


Mark
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Old 31st March 2005, 06:59 AM   #2
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What do you mean by modified? From what to what?
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Old 31st March 2005, 11:00 AM   #3
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Hi HTguy,

I belive these formulas will help you...



Vout= Vref x (1+R5/R3) Vref= breakdown voltage for D1/D2 (for LM329=6V95 or TL431=2V5 if you need 5V or less for Vout)

(R3 x R5)/(R3+R5)=500 Ohma (+/-10 Ohma max.)
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Old 31st March 2005, 02:45 PM   #4
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why not look at the homepage of the one who made the modified Jung regulator boards, Mark ?

http://www.aoselectronics.com/jungsrpcb.html

An LM317/337 handles 1.5 A, the D44H11/D45H11 does 10 A.
Take your pick !
The resistor value for setting the output voltage is above the circuit.
Mouser sells the D44H11/D45H11.
The LM3290Z sets the reference voltage at 6.9V.
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Old 31st March 2005, 03:31 PM   #5
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Quote:
Originally posted by jacco vermeulen
why not look at the homepage of the one who made the modified Jung regulator boards, Mark ?

http://www.aoselectronics.com/jungsrpcb.html

An LM317/337 handles 1.5 A, the D44H11/D45H11 does 10 A.
Take your pick !
The resistor value for setting the output voltage is above the circuit.
Mouser sells the D44H11/D45H11.
The LM3290Z sets the reference voltage at 6.9V.
Jacco -- was that your letter in Elektor?

The older boards (from the original Jung/Didden article) are still available on AudioXpress's website:

http://www.audioxpress.com/bksprods/...cuitsbuild.htm

if you are cramped for space, you might consider the MJD44H11 and MJD45H11 -- these are a bit smaller, DPak -- handle 8 amps. In talking with ON-Semi I figured out the correct heat sink.
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