Just use the correct values in the correct places...
check12
Senior Member
Last Activity: 04-14-2025, 01:07 AM
Joined: 11-19-2012
Location: Glasgow
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Lol... The pot with or without the midpoint is exactly the same electronically. The little click is only guidance for extremely low light conditions or blind users... electronically there is no difference....
Just use the correct values in the correct places...
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No.... AC pot has a completely different taper to a B pot.
They are obviously completely different values too. AC10K = AC103. ....
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Last edited by check12; 04-09-2025, 04:59 PM.Leave a comment:
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Yes same as the already listed 6pin B50K with midpoint & 23mm shaft length for EQ etc ...
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Ok corrected list ... (taking it that the 6pin pots are 12mm between the 2X "snap in" securing tabs on the pot bases) that's the most common size:
B503 = B50K (6pin with midpoint) use for headphones & low, mid, high EQ = [url]https://www.aliexpress.com/item/1005007343612656.html[/url]
B503 = B50K (3pin with midpoint) for FX = [url]https://www.aliexpress.com/item/1005006554255808.html[/url]
AC103 = AC10K (6pin with midpoint) for "balance" = [url]https://www.aliexpress.com/item/1005008338040792.html[/url]
...Leave a comment:
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OK didn't consider that and actually I think I have advised wrong base size for the pot frame snap in lugs.
Post the measurements (length, width) of the square pot bases & I'll have a look again when I've got time... 👍...Leave a comment:
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B503 = B50K (6pin with midpoint) use for headphones, low, mid, high EQ = [URL]https://www.aliexpress.com/item/1005007954345312.html[/URL]
B503 = B50K (3pin with midpoint) for FX = [URL]https://www.aliexpress.com/item/1005005806597186.html[/URL]
AC103 = AC10K (6pin with midpoint) for "balance" = [URL]https://www.aliexpress.com/item/1005006950880734.html[/URL]
I know the original headphone pot did not have a midpoint detent but having one will make no difference.
Don't forget to choose the correct "AC10K With Midpoint" option...Leave a comment:
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This might be pretty similar just with added protect circuit...
[ATTACH]n3504333[/ATTACH]...Leave a comment:
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This is a bad connection... try re-soldering the pins to the pcb for the jack & XLR sockets (even if they look fine)... if that doesn't work then there may be a physical problem with the jack socket itself & it may need replaced.... but from what you say seems like a simple bad connection.......
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Remove the cap you think is shorted and test it while it's off the pcb.....good chance it's not shorted and the short is something else...Leave a comment:
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First thing I would do with that amp is loosen the heatsink screws & remove the pcb with all devices attached, turn it over and check the whole underside for dry/bad solder joints... then while it's off reflow the solder on at least all the legs of the components that attach to the heatsink. Then replace pcb on heatsink & check idle current again....
I'm taking it you've already checked all voltage rails etc.......Leave a comment:
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Yes the only difference is the amount of pins, these pot serial numbers are just behringer part numbers ... e.g. for the 3B503x the "3" and the "x" are likely just added as part identifiers for behringer, the important details are:
the B = linear taper
the 503 code = (which means 50 followed by three zero's) = 50,000 ohms or 50k ohm
... then you also do a visual & manual check to find:
the pot mounting orientation = vertical
the number of pins = either 3 or 6
the length of shaft & size of...Leave a comment:
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Caps on the main pcb should not need replaced.
OK photos confirm all pots are mounted vertically so what I advised in reply #27 is correct.
I'm taking it when you say "central pin" you mean you feel a little click when the pot shaft is in the middle of the range of travel? e.g. Half way between fully CCW & fully CW?Leave a comment:
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For confirmation can you post a photo of the 3B503x pot... I want to make sure it's a vertical pot?...Leave a comment:
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Use the same replacement pot as low, mid, high EQ.
Easiest way to replace caps in behringer power supply is to use 105c (temperature) low esr for all replacements.
IMO your doing a lot of unnecessary work... What is actually wrong with the desk?...Leave a comment:
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For headphones= Search Google for "B503 linear 50k ohm vertical no detent dual 6 pin pot“
For FX= Search for "B503 linear 50k ohm vertical center detent 3 pin pot"
For low, mid & high EQ= Search for "B503 linear 50k ohm vertical center detent dual 6 pin pot"
For balance (pan?) = Search for "AC taper 10k ohm vertical center detent dual 6 pin blend pot"
AC taper blend pots can be difficult to find but don't often need replaced.
There's no way I have time to search for where you can get the...Leave a comment:
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Just saw this ... haven't got time right now but tomo evening maybe ... I'll post the values etc. unless someone else does it first ...
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Corrosion is common in pro-audio gear & lighting used in clubs & venues... especially where smoke machines and hazers are used as the smoke vapour gets sucked inside amplifiers etc. by the cooling fans and builds up a hygrosopic residue over time......Leave a comment:
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Then you need to list the serial numbers on each pot and also the number of pins... I am not telepathic... 😵💫Leave a comment:
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Let us know how you get on...Leave a comment:
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The plastic thing is called the "shaft", my link was just an example ... most pots are available in long and short shaft versions.
This guy that I couldn't remember earlier was a wealth of knowledge about replacement pots for behringer if you can't find them locally, maybe good for a deal if you want multiple pots: [url]https://www.theaudioguyuk.com/product/behringer-panasonic-6-pin-vertical-mount-stereo-50kg-rotary-variable-resistor-pot-with-centre-click/106[/url]
If it's Panasonic pots he's selling then they are pretty good ...The plastic thing is...
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