adn6244 0 Report post Posted September 15, 2008 (edited) Hello, I need help...what's new I bought the amp from Dr Meier Meier Audio but the problem is now finding the Alps 100k pot!! I tried many places except koba, the pot is really difficult to get. While I have spare 10k pot from the old projects, I don't know how to increase the resistor value to compensate for the decrease in pot's resistance. I read this ohm's law but which resistor to change The diagram is attached or can be found in the above link...all help is greatly appreciated! [attachmentid=4008] Corda.bmp Edited September 15, 2008 by adn6244 Share this post Link to post Share on other sites
heady 0 Report post Posted September 15, 2008 100K pot can find easy but whether size is ok or not as quite big. Go to Well Audio in Burlington and look for Franky. He stock the Alps RK27 series pots. Share this post Link to post Share on other sites
alvin1118 0 Report post Posted September 15, 2008 the ALPS in the pic looks like the one being used in Mini3? Share this post Link to post Share on other sites
adn6244 0 Report post Posted September 16, 2008 Thanks Bro heady and alvin. The pot is the RK097 ie the one used in Mini3, 8 pins with built in switch not the big blue pot. I have both Mini 3 10k pot and the big blue pot. I'll try Well Audio in these 2 days Share this post Link to post Share on other sites
heady 0 Report post Posted September 16, 2008 Thanks Bro heady and alvin. The pot is the RK097 ie the one used in Mini3, 8 pins with built in switch not the big blue pot. I have both Mini 3 10k pot and the big blue pot. I'll try Well Audio in these 2 days Wells Audio sell only the RK27 big blue pot not the smaller switched RK097. At least I have not seen him sell this smaller one. So you may need to do some creative air-wiring. Share this post Link to post Share on other sites
heady 0 Report post Posted September 17, 2008 Try Koba. I saw they have more selection of pots now. Share this post Link to post Share on other sites
mouz 0 Report post Posted September 17, 2008 Yah, i tot i saw something similar to mini3 pot, was there last week btw Share this post Link to post Share on other sites
adn6244 0 Report post Posted September 18, 2008 (edited) went to koba after lunch...searched for 30 minutes..they don't have the 100kx2 pot that has 8 pins like the Alps. Those that they have are either 6 pins or the size is too big or only 100k pot with 6 pins and no built in switch. I'll try Well later. Thanks for the suggestion so far. Another alternate solution is to increase the resistor value...is this worth trying? Do I change R15/16 pr R11/12? If the voltage is 4.5v to either channel (?), is this the max voltage that will flow thru? Pardon my layman words I don't have the elec eng background to quote it in the smarter manner and still desperately trying to find something that may work. Edited September 18, 2008 by adn6244 Share this post Link to post Share on other sites
adn6244 0 Report post Posted September 20, 2008 Found some articles HERE & HERE By the way...the site also sells headphone amp Share this post Link to post Share on other sites