replacing treble/bass cut pot

rostmann · 6th August 2008, 03:21 AM

I am brand new to the forum and a rank but really determined novice restoring an ancient 120w solid state Heathkit TA-17 guitar amp to spec. All is well so far but for one problem: It uses a single treble/bass cut 10k ohm pot in one of the channels. The pot is shot. It appears to have had a center detent. It is impossible to find a center detent 10k replacement short of ordering a 500-lot from Bourns. What are possible options?

Mooly · 10th August 2008, 08:58 AM

Hi,
Options eh, Find one physically similar in size (with or without detent). Some old pots were huge compared to modern stuff, that could be a problem.
If the pot is just "crackly" and intermittant it is possible to open many types up to reveal the carbon track. This can then be cleaned and the wiper retensioned (bent

) to make contact with a slightly different part of the unused carbon track.
Post a picture of it, someone may recognise it.

6th August 2008, 03:21 AM	#1
rostmann diyAudio Member Join Date: Aug 2008	replacing treble/bass cut pot I am brand new to the forum and a rank but really determined novice restoring an ancient 120w solid state Heathkit TA-17 guitar amp to spec. All is well so far but for one problem: It uses a single treble/bass cut 10k ohm pot in one of the channels. The pot is shot. It appears to have had a center detent. It is impossible to find a center detent 10k replacement short of ordering a 500-lot from Bourns. What are possible options?

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10th August 2008, 08:58 AM	#2
Mooly diyAudio Member Join Date: Sep 2007	Hi, Options eh, Find one physically similar in size (with or without detent). Some old pots were huge compared to modern stuff, that could be a problem. If the pot is just "crackly" and intermittant it is possible to open many types up to reveal the carbon track. This can then be cleaned and the wiper retensioned (bent ) to make contact with a slightly different part of the unused carbon track. Post a picture of it, someone may recognise it.

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