I build my JLH amplifier...

LT1083CP · 23rd April 2010, 08:02 PM

Today I am start building my JLH power amplifier. I bought on eBay two PCB for voltage regulator. Please look PCB and heatsink placing and screw for mounting. I think use ultra fast diode (not schottky) Please help me select shunt capacitors for this 8 diode in parallel. What is better ceramic C0G, NP0 or Wima MKS polyester capacitors?

LT1083CP · 27th April 2010, 03:14 PM

Please help me select Capacitors. C0G NP0 or WIMA MKS2 polyester?

Mooly · 27th April 2010, 06:11 PM

I'd stick with polyesters... stability and tempco just doesn't matter here. Make sure you get a high enough voltage rating, and the correct lead pitch to fit the pcb... and without knowing the circuit can't tell you what that voltage rating would be.

Bigun · 27th April 2010, 07:06 PM

my 2c: For shunting rectifiers in the psu you are probably not needing something exotic - multilayer ceramic should be perfectly good. Buy from a reputable place, there's a lot of junk on the market and supply chains in the electronics industry are strained in certain areas.

Note that multilayer ceramic should not have the self-oscillation problems of the single layer devices.

LT1083CP · 5th May 2010, 04:06 PM

I think what I use WIMA MKS2 0.1uF capacitors

LT1083CP · 15th June 2010, 07:13 PM

I use LT1083CP in TO247 package what is better for this case ceramic or silicon thermalpad?

LT1083CP · 22nd July 2010, 03:13 PM

U buy 10n C0G capacitors for this board. My first step

Cap mounting...

Greg Erskine · 22nd July 2010, 07:28 PM

Very good looking PSU board.

Metal standoffs look dangerous on the right hand side (third picture).

regards

LT1083CP · 22nd July 2010, 07:35 PM

I not use this standoffs it's only for soldering. PCB not have copper around the holes.
My second step diode mounting...

LT1083CP · 07:49 PM

I mount heatsink and AC power input connector to PCB

27th April 2010, 06:11 PM	#3
Mooly diyAudio Member Join Date: Sep 2007	I'd stick with polyesters... stability and tempco just doesn't matter here. Make sure you get a high enough voltage rating, and the correct lead pitch to fit the pcb... and without knowing the circuit can't tell you what that voltage rating would be. __________________ ------------------------------------------------------- *A simulation free zone.* *Design it, build it, test it.*

27th April 2010, 07:06 PM	#4
Bigun diyAudio Member Join Date: Jan 2009 Location: K-W Ontario Blog Entries: 2	my 2c: For shunting rectifiers in the psu you are probably not needing something exotic - multilayer ceramic should be perfectly good. Buy from a reputable place, there's a lot of junk on the market and supply chains in the electronics industry are strained in certain areas. Note that multilayer ceramic should not have the self-oscillation problems of the single layer devices. __________________ "The test of the machine is the satisfaction it gives you. There isn't any other test. If the machine produces tranquility it's right. If it disturbs you it's wrong until either the machine or your mind is changed." Robert M Pirsig.

22nd July 2010, 07:28 PM	#8
Greg Erskine diyAudio Member Join Date: Jan 2002 Location: Sydney/Australia	Very good looking PSU board. Metal standoffs look dangerous on the right hand side (third picture). regards __________________ Greg Erskine

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27th April 2010, 03:14 PM	#2
LT1083CP diyAudio Member Join Date: Mar 2010	Please help me select Capacitors. C0G NP0 or WIMA MKS2 polyester?

5th May 2010, 04:06 PM	#5
LT1083CP diyAudio Member Join Date: Mar 2010	I think what I use WIMA MKS2 0.1uF capacitors

15th June 2010, 07:13 PM	#6
LT1083CP diyAudio Member Join Date: Mar 2010	I use LT1083CP in TO247 package what is better for this case ceramic or silicon thermalpad?

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