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Old 20th August 2008, 03:24 PM   #1
pjanda1 is online now pjanda1  United States
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Default this 22K trim pot

A while ago, a rammed a screw through the laser offset adjust pot on my old Philips CDP. I left it at a shop (I don't have a scope to adjust the pot), but they were evidently unable to find a replacement for the part. They also thought standing a new pot on jumpers might be a compromise. I asked for the CDP back, figuring I'll find something, toss it in, and see if I can adjust it by ear. It is a 22K single turn pot, and the schematic claims .05W. It looks identical too the brown top pot below (a 4.7k from surplus sales).

I've seen a few folks sell a very similar looking pot (somebody had an identical one, can't recall who, the rest are newer looking) as a replacement bias pot for a Marshall amplifier. One from AES is pictured below. These all seem to be rated .5W rather than .05W. Is there any reason they wouldn't work?

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Old 20th August 2008, 03:26 PM   #2
pjanda1 is online now pjanda1  United States
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And the new .5W pot:
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Old 20th August 2008, 03:55 PM   #3
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The new 0.5W pot should work just fine
The only difference is that the new 0.5W pot can handle 10 times more power than the old 0.05W........
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Old 20th August 2008, 04:05 PM   #4
pjanda1 is online now pjanda1  United States
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That's what I figured. I wanted to be sure the .05w wasn't in some way special (like tighter tolerances or something).

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Old 20th August 2008, 04:08 PM   #5
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Tolerances (quality) depends on material used....
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