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Help me find this pot

post #1 of 19
Thread Starter 

This is a nice little amp I won at a head-fi meet raffle a couple of years ago. Built and donated by Paul / Front Panel Express. I gave it to my daughter to use with her D2000's, but a few months ago the volume pot went out, so I ripped it off the board in order to replace it.

 

I called and sent pics to Mouser and never got a reply. Paul hasn't logged on to head-fi for almost a year and I'm wondering if anyone help me find a replacement?

 

post #2 of 19

Just from the shell, it looks like a Bourns Audio taper 50K pot.

 

Most likely this one  http://www.mouser.com/ProductDetail/Bourns/PTR902-2020F-A503/?qs=sGAEpiMZZMtC25l1F4XBU4LIzrlRxKBZKzp6WgynPGI%3d

post #3 of 19

That may also be the alps RK97 (I think they are compatiable) 

 

what is the impedance? 

 

http://www.alps.com/WebObjects/catalog.woa/E/HTML/Potentiometer/RotaryPotentiometers/RK097/RK0971221Z05.html

 

http://tangentsoft.net/shop/

 

More importantly, what amp is that? 

post #4 of 19
Thread Starter 
Quote:
Originally Posted by shadow419 View Post

Just from the shell, it looks like a Bourns Audio taper 50K pot.

 

Most likely this one  http://www.mouser.com/ProductDetail/Bourns/PTR902-2020F-A503/?qs=sGAEpiMZZMtC25l1F4XBU4LIzrlRxKBZKzp6WgynPGI%3d

 

Thanks! That sure does look like it although I dont remember the metal shaft being that beefy. I think I'll just order one and find out!

 

EDIT: That one is not in stock and has a 16 week lead time. Do you think I could use this one instead?

 

http://www.mouser.com/ProductDetail/Bourns/PTR901-2015K-B503/?qs=sGAEpiMZZMtC25l1F4XBU4LIzrlRxKBZgXGu0eePJw8%3d

 

The description says it's "50K linear" instead of "50K audio" like the one you listed...


Edited by palmfish - 4/30/13 at 6:42am
post #5 of 19
Thread Starter 
Quote:
Originally Posted by nikongod View Post

That may also be the alps RK97 (I think they are compatiable) 

 

what is the impedance? 

 

http://www.alps.com/WebObjects/catalog.woa/E/HTML/Potentiometer/RotaryPotentiometers/RK097/RK0971221Z05.html

 

http://tangentsoft.net/shop/

 

More importantly, what amp is that? 

 

It's 50K.

 

The amp is a DIY - Paul built about a dozen of them for the raffle.

post #6 of 19

You can not use a linear pot in place of an audio taper. 

 

You may be able to find the same pot without the switch, if you dont need the switch. 

post #7 of 19
Thread Starter 
Quote:
Originally Posted by nikongod View Post

You can not use a linear pot in place of an audio taper. 

 

You may be able to find the same pot without the switch, if you dont need the switch. 

 

Hmmm, I do need the switch. I guess I'll just wait until it's back in stock.

 

Thank you for your help!

post #8 of 19
Quote:
Originally Posted by palmfish View Post

 

Hmmm, I do need the switch. I guess I'll just wait until it's back in stock.

 

Thank you for your help!

I tried looking at a couple of suppliers, and it seems they're all out.  

post #9 of 19
Thread Starter 
Quote:
Originally Posted by shadow419 View Post

I tried looking at a couple of suppliers, and it seems they're all out.  

 

Yeah, I did that too. Thanks for checking!

 

She has an E7 to hold her over until I get this amp working again...

post #10 of 19

I'd use the Alps that Nikongod posted above if it is the same physical size. Pinout will be the same. Probably a better pot as well. Amb sells these also.

post #11 of 19
Thread Starter 
Quote:
Originally Posted by Pars View Post

I'd use the Alps that Nikongod posted above if it is the same physical size. Pinout will be the same. Probably a better pot as well. Amb sells these also.

That link didnt provide a photo so I couldnt tell if it would fit. The description also says 10K and I need 50K. Will it still be a suitable replacement?

EDIT: I see I didnt scroll down the page far enough...lol. All the info is there!

Thanks!
Edited by palmfish - 4/30/13 at 12:49pm
post #12 of 19
post #13 of 19
Thread Starter 

Awesome, thanks!

EDIT: it looks like the pins are different on this one and wont fit on the board. This is beginning to look like the quest for the Holy Grail...LOL
Edited by palmfish - 4/30/13 at 6:54pm
post #14 of 19

Looks very much like the unit I used on my first cmoy amp kit from JDS Labs.  Check out their diy parts section - they seem to carry the pot.

 

BK

post #15 of 19
Thread Starter 

Good eye BK, thanks! That's the Alps pot that Nikongod linked above. Its a 10K pot, but since my 50K pot appears to be unobtainable, I think Im going to risk the $3.00 and see how the Alps works.

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