Replacing electronic parts

Helpful hints on how to build 'em, and where to get the stuff you need.
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jimbo7
Posts: 753
Joined: Fri Dec 28, 2012 10:45 am
Location: St. Louis

Replacing electronic parts

#1 Post by jimbo7 » Sun Apr 18, 2021 3:49 pm

I was reaching for a box on the top shelf of a closet and my DBX PA+ that was in it fell out and onto the hardwood floor. :shock: I dampened the shock slightly with my bare foot (the physical pain was way less than the emotional pain). It still bent the aluminum faceplate some and the rotary-knob shaft has a bend. The faceplate is mostly straight now and the knob still works but the it rubs.
So I took it apart and it seems like a it'll be pretty easy to remove and solder a new one on. The question is should I send it in to Harmon, order the part from Harmon, or check Mouser for a similar pot? I already emailed Harmon and waiting for a response.
It's a spare unit, so not a big deal or priority. I just bothers me knowing it was in perfect condition and now it's sitting in a dark scary closet with battle wounds.
BFM builds:
XF212
T24 BP102 24"
2x SLA's 6-5" mids, 9- gt-302's
2x AT 14" MCM 55-2421
TrT 5" MCM 55-2421
AT 18" JBL GTO804
2x OT12 flat array
2x SLA Pro 2-Alpha 6's 2-Goldwoods
2x T39 24" 3012lf
Simplex 10 BP102

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Bill Fitzmaurice
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Joined: Tue May 02, 2006 5:59 pm

Re: Replacing electronic parts

#2 Post by Bill Fitzmaurice » Sun Apr 18, 2021 4:45 pm

If you know the value and taper there's no need to involve Harmon.

Bruce Weldy
Posts: 7648
Joined: Fri Nov 27, 2009 11:37 am
Location: New Braunfels, TX

Re: Replacing electronic parts

#3 Post by Bruce Weldy » Sun Apr 18, 2021 10:16 pm

If it works, don't do anything to it. As long as it turns and the "push" switching works - leave it alone and use it the way it is.

You could end up screwing it up just for aesthetics.

6 - T39 4-25" 2-22" 3012LF
4 - OT12 2512 Melded/NSD2005
1 - T24
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."

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Rune Bivrin
Posts: 520
Joined: Tue Aug 19, 2008 5:42 pm
Location: Stockholm, Sweden

Re: Replacing electronic parts

#4 Post by Rune Bivrin » Mon Apr 19, 2021 5:59 am

That's very likely not a potentiometer in the traditional sense, but rather a rotary encoder. They don't really have a value as such, but can be had cheaply: https://www.amazon.com/s?k=rotary+encod ... ush+button
In build order:
O12 with no tweeter.
3 x WedgeHorns.
2 x Jack 10 without tweeters.
2 x DR250.
2 x 16" T39
1 x Tuba 24
2 x SLA Pro (sort of...)

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