a/d/s pq20 question

mike49504 · 14th December 2007, 12:37 PM

Im working on a a/d/s pq20 amp i repaired the power supply in it but there is 2 yellow thermisters in the circuit without them the amp dose nothing i measured them with my multimeter and it reads 0.38 ohms when cold wondering if anyone knows what i can replace them with and were i can get them any help would be appericated thanks

1moreamp · 14th December 2007, 04:44 PM

I have never seen these broken. Perhaps if the wires are broken at the yellow body you can shave the coating back ans solder flexible wires to the wire stubs and then place the device back in service.

Due to age I know of no source for these, perhaps if you could find a PQ-15 or 20 thats just parts then maybe spares could be had....Good luck

mike49504 · 19th December 2007, 03:11 PM

wellthey are missing when i bought the amp someone took them out wondering if i can put anything in its place to make the amp work snice i have no clue what value they are

1moreamp · 19th December 2007, 05:34 PM

Can you get your hands on a PQ-15 < they are just about the same power supply wise. Then you could remove and measure the temp sensors at 25 degrees C and take a shot at replacing them.

Anyone here got a ADS schematic diagram floating around???

jpruden · 20th December 2007, 04:52 AM

I have one, but I'm in the middle of moving my den, so I have NO idea where it is.

If I come across it, I'll post it. May be some time, though... sorry...

14th December 2007, 12:37 PM	#1
mike49504 diyAudio Member Join Date: Sep 2006	a/d/s pq20 question Im working on a a/d/s pq20 amp i repaired the power supply in it but there is 2 yellow thermisters in the circuit without them the amp dose nothing i measured them with my multimeter and it reads 0.38 ohms when cold wondering if anyone knows what i can replace them with and were i can get them any help would be appericated thanks

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14th December 2007, 04:44 PM	#2
1moreamp diyAudio Member Join Date: Dec 2005 Location: Northern California	I have never seen these broken. Perhaps if the wires are broken at the yellow body you can shave the coating back ans solder flexible wires to the wire stubs and then place the device back in service. Due to age I know of no source for these, perhaps if you could find a PQ-15 or 20 thats just parts then maybe spares could be had....Good luck

19th December 2007, 03:11 PM	#3
mike49504 diyAudio Member Join Date: Sep 2006	wellthey are missing when i bought the amp someone took them out wondering if i can put anything in its place to make the amp work snice i have no clue what value they are

19th December 2007, 05:34 PM	#4
1moreamp diyAudio Member Join Date: Dec 2005 Location: Northern California	Can you get your hands on a PQ-15 < they are just about the same power supply wise. Then you could remove and measure the temp sensors at 25 degrees C and take a shot at replacing them. Anyone here got a ADS schematic diagram floating around???

20th December 2007, 04:52 AM	#5
jpruden diyAudio Member Join Date: Sep 2007	I have one, but I'm in the middle of moving my den, so I have NO idea where it is. If I come across it, I'll post it. May be some time, though... sorry...

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