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Dynaco PAS 3x Quad Cap and ticking sound
Dynaco PAS 3x Quad Cap and ticking sound
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Old 13th September 2018, 02:12 PM   #1
jimmeq is offline jimmeq  United States
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Location: 6 miles West of Jiminy Peak Ski Resort
Default Dynaco PAS 3x Quad Cap and ticking sound

I'm a noobie to rebuilding and have started with a Dynaco PAS 3X. It was working but not sounding good so I began changing one part at a time. So far I've replaced the rectifier and the caps under it, the transformer and recently the Quad Cap. I got it from DynakitParts.com- a 30-20-20-20. I also replaced the 47K and two 10K resistors at 1/2 W that are soldered to the cap.

When I turn on the amp, after about 10 seconds I hear a slight *tick* sound and the power indicator light bulb flickers.

Should I have used 1W resistors?
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Old 13th September 2018, 02:55 PM   #2
J247W is offline J247W  United Kingdom
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Join Date: Jun 2018
Location: UK, Leicestershire
Quote:
Originally Posted by jimmeq View Post
I'm a noobie to rebuilding and have started with a Dynaco PAS 3X. It was working but not sounding good so I began changing one part at a time. So far I've replaced the rectifier and the caps under it, the transformer and recently the Quad Cap. I got it from DynakitParts.com- a 30-20-20-20. I also replaced the 47K and two 10K resistors at 1/2 W that are soldered to the cap.

When I turn on the amp, after about 10 seconds I hear a slight *tick* sound and the power indicator light bulb flickers.

Should I have used 1W resistors?
Sounds like you have not soldered something properly, check the soldered joints under a "magnilamp" if you have one ? try to wiggle the components to see if anything moves, but with power off or course.

Check the components you have replaced are the right impedance as well.

Regards

J247W
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Old 13th September 2018, 04:34 PM   #3
dtaylo3 is offline dtaylo3  United States
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Join Date: Nov 2004
Location: coloradao usa
I would recommend going to Triode Electronics Home Page and World HQ and getting the Sheldon Stokes board/kit for upgrading power filtering, etc. It removes the selenium rectifier, quad cap, puts in a necessary fuse, improves the capacitor filtering, etc.
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Old 14th September 2018, 03:02 PM   #4
jimmeq is offline jimmeq  United States
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Join Date: Aug 2018
Location: 6 miles West of Jiminy Peak Ski Resort
Thanks for the help! Very much appreciated. I make one change at a time just so when something like this happens it's easier for me to try and figure it out. And then there are often those times I can't... I do have a magnifying glass and a bright light....

I'm only replacing the old parts trying to stay with as much of the original design as I can.
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