I apologize if I'm not using what you folks consider "standard" terminology. Perhaps you might direct me to to a dictionary of electronic component terminology accepted by this forum. My use of "1/4 inch mono jack" in a search returned results from all over the Web: Amazon, Ebay, Wikipedia, BG Micro Electronics, All Electronics, Switchcraft etc.,etc.. But hey, I'm just a guy who has no experience in this area, other than as a hobbyist 35 years ago, who recently saw a clever idea (guitar sustainer) and thought I'd give it a try building it because the commercial product is ridiculously overpriced, legacy technology. Again, sorry if I confused you. I'm a little confused myself at the moment.