Need help locating a specific 10k stereo ganged pot

o. l. t. · 5th May 2010, 04:57 PM

PPI Art amps use a block style oversized (as opposed to the mini's most amps use) 10k stereo ganged pot part number 51abdb16s15 made in Mexico.

Can't find them and need a couple. Any help on locating them would be fantastic.

Perry Babin · 5th May 2010, 05:53 PM

Are they simply noisy when you turn them or are they physically damaged?

o. l. t. · 5th May 2010, 06:48 PM

None of the above, just need to source two of them.

While I have you here though, I have an A600 Art that when the remote power is given the speaker will bias itself outwards 3mm and play with some scratchiness. With no rca input at all and turning the amp on the speaker pops for a few seconds lightly as if a capacitor is trying to charge up or something. It is the right channel on this Art 600. What would cause the DC bias and popping? The pre-driver cards? Capacitors? Thank you!

o. l. t. · 9th May 2010, 08:12 AM

I've located the pot above, but it won't be here for a week. I've decided to jump the missing pot out. It's a 10k pot so it should read 5k per side to the center at exactly halfway (or half gain in this case). This diagram of replacing the pot with fixed resistors of 5k should be right, shouldn't it? What watt should I use?

Perry Babin · 9th May 2010, 01:39 PM

If you've found an exact replacement, post a link to the source. I'm sure others would be interested.

The gain may not be precisely what it would be with the pot centered if the pot has a log taper but it will work as shown. The power dissipation in the resistors is insignificant. 1/8w resistors will be sufficient.

The problem with the DC offset isn't likely to be a capacitor (but, that this point, you shouldn't rule anything out). The amp has DC offset pots but if the channel doesn't have constant DC (regardless of RCAs in/out), I don't think they will help.

Does the other channel play flawlessly?

o. l. t. · 10th May 2010, 04:03 PM

Well Perry we've been duped. I have been chasing my tail looking all over for these pots waiting on this PPI to get here 150440136611.

We know the PPI gains can be set back in there pretty good, but this seller has sold many amps recently that had recessed gains so I figured he knew what he was doing. Turns out he just couldn't see them! Amp is here, works perfectly. HA! Now onto finding that transistor for my A600.......

5th May 2010, 04:57 PM	#1
o. l. t. diyAudio Member Join Date: Dec 2009	Need help locating a specific 10k stereo ganged pot PPI Art amps use a block style oversized (as opposed to the mini's most amps use) 10k stereo ganged pot part number 51abdb16s15 made in Mexico. Can't find them and need a couple. Any help on locating them would be fantastic.

5th May 2010, 05:53 PM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Are they simply noisy when you turn them or are they physically damaged? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

9th May 2010, 01:39 PM	#5
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	If you've found an exact replacement, post a link to the source. I'm sure others would be interested. The gain may not be precisely what it would be with the pot centered if the pot has a log taper but it will work as shown. The power dissipation in the resistors is insignificant. 1/8w resistors will be sufficient. The problem with the DC offset isn't likely to be a capacitor (but, that this point, you shouldn't rule anything out). The amp has DC offset pots but if the channel doesn't have constant DC (regardless of RCAs in/out), I don't think they will help. Does the other channel play flawlessly? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

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5th May 2010, 06:48 PM	#3
o. l. t. diyAudio Member Join Date: Dec 2009	None of the above, just need to source two of them. While I have you here though, I have an A600 Art that when the remote power is given the speaker will bias itself outwards 3mm and play with some scratchiness. With no rca input at all and turning the amp on the speaker pops for a few seconds lightly as if a capacitor is trying to charge up or something. It is the right channel on this Art 600. What would cause the DC bias and popping? The pre-driver cards? Capacitors? Thank you!

9th May 2010, 08:12 AM	#4
o. l. t. diyAudio Member Join Date: Dec 2009	I've located the pot above, but it won't be here for a week. I've decided to jump the missing pot out. It's a 10k pot so it should read 5k per side to the center at exactly halfway (or half gain in this case). This diagram of replacing the pot with fixed resistors of 5k should be right, shouldn't it? What watt should I use?

10th May 2010, 04:03 PM	#6
o. l. t. diyAudio Member Join Date: Dec 2009	Well Perry we've been duped. I have been chasing my tail looking all over for these pots waiting on this PPI to get here 150440136611. We know the PPI gains can be set back in there pretty good, but this seller has sold many amps recently that had recessed gains so I figured he knew what he was doing. Turns out he just couldn't see them! Amp is here, works perfectly. HA! Now onto finding that transistor for my A600.......

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