Toasted Posted May 6, 2008 Share Posted May 6, 2008 Can any of you good folk help me source a 1M Rev Log pot - ideally 16mm Alpha? Ta. Quote Link to comment Share on other sites More sharing options...
wateroftyne Posted May 6, 2008 Share Posted May 6, 2008 Hey! Can I help things along by admitting that I have no idea what any of that means? Is it something to do with space rockets? Have a bump on me... Good luck in your search! Quote Link to comment Share on other sites More sharing options...
spider Posted May 6, 2008 Share Posted May 6, 2008 [quote name='Toasted' post='193335' date='May 6 2008, 09:09 PM']Can any of you good folk help me source a 1M Rev Log pot - ideally 16mm Alpha? Ta.[/quote] I've probably got some in a drawer in my workshop. Not sure about the 'rev' bit though... Can I ask what it's for ? Quote Link to comment Share on other sites More sharing options...
Toasted Posted May 6, 2008 Author Share Posted May 6, 2008 1M Reverse Log . . . . I think? Quote Link to comment Share on other sites More sharing options...
spider Posted May 6, 2008 Share Posted May 6, 2008 [quote name='Toasted' post='193387' date='May 6 2008, 09:42 PM']1M Reverse Log . . . . I think? [/quote] I'm happy to send you what i've got. Not convinced about the 'reverse' bit though ... Quote Link to comment Share on other sites More sharing options...
Toasted Posted May 6, 2008 Author Share Posted May 6, 2008 (edited) Thank you for your kind offer. It's on a bill of materials for a project I'm doing. I'll email the person who originated the BOM and ask for clarification EDIT: It should be marked as c1M, I think. Edited May 6, 2008 by Toasted Quote Link to comment Share on other sites More sharing options...
spider Posted May 8, 2008 Share Posted May 8, 2008 [quote name='Toasted' post='193433' date='May 6 2008, 10:19 PM']Thank you for your kind offer. It's on a bill of materials for a project I'm doing. I'll email the person who originated the BOM and ask for clarification EDIT: It should be marked as c1M, I think.[/quote] Got a couple put aside: They're A1M - A = log, 1M = 1Meg. Never (in 20-odd years of working in electronics) heard of a C1M. B1M would be linear. Still don't know what this 'rev' thing is about - if you want to reverse the action of a pot, you wire it differently. Anyhoo, if you want one (or two) let me know - i'll stick 'em in the post. Quote Link to comment Share on other sites More sharing options...
obbm Posted May 8, 2008 Share Posted May 8, 2008 Joe, Ask John East. Quote Link to comment Share on other sites More sharing options...
spider Posted May 8, 2008 Share Posted May 8, 2008 [quote name='obbm' post='194945' date='May 8 2008, 07:57 PM']Joe, Ask John East.[/quote] So you're saying my information and advice is no use then...? Quote Link to comment Share on other sites More sharing options...
obbm Posted May 8, 2008 Share Posted May 8, 2008 [quote name='spider' post='194957' date='May 8 2008, 08:07 PM']So you're saying my information and advice is no use then...?[/quote] I can't for one minute see how you can jump to that conclusion from the four words that I wrote. Reverse log pots are exactly that, a reverse log scale. Also known as Anti-log. I believe John uses them so he will know where to source one which was Joe's original question I believe. Quote Link to comment Share on other sites More sharing options...
spider Posted May 8, 2008 Share Posted May 8, 2008 (edited) [quote name='obbm' post='194967' date='May 8 2008, 08:30 PM']I can't for one minute see how you can jump to that conclusion from the four words that I wrote.[/quote] Really ? Perhaps I'm just over-sensitive. [quote]Reverse log pots are exactly that, a reverse log scale. Also known as Anti-log. I believe John uses them so he will know where to source one which was Joe's original question I believe.[/quote] Which is pretty much what I was saying, to the best of my knowledge the easiest way to achieve this is to wire a log pot backwards... Or am I missing something ? Probably. Edited May 8, 2008 by spider Quote Link to comment Share on other sites More sharing options...
obbm Posted May 8, 2008 Share Posted May 8, 2008 [quote name='spider' post='195017' date='May 8 2008, 09:35 PM']Which is pretty much what I was saying, to the best of my knowledge the easiest way to achieve this is to wire a log pot backwards... Or am I missing something ? Probably.[/quote] It'll operate in the opposite direction to taht which is normally acceptable. Blend pots usually comprise a log and an antilog track. As one pick-up goes up so the other comes down. Quote Link to comment Share on other sites More sharing options...
Al Heeley Posted May 14, 2010 Share Posted May 14, 2010 (edited) I'm also hunting for same pot - guess you've been putting together a Small Clone Chorus or repairing a MusicMan? Any luck in sourcing one? Care to share? The Tonepad schematics refer to 1M-C marking on the back of this pot and its not a log pot wired backwards! (Have a look at the taper graphs on this page: [url="http://www.geofex.com/article_folders/potsecrets/potscret.htm)"]http://www.geofex.com/article_folders/pots...s/potscret.htm)[/url] Edited May 14, 2010 by Al Heeley Quote Link to comment Share on other sites More sharing options...
neepheid Posted May 14, 2010 Share Posted May 14, 2010 (edited) G&L L-2000 uses a 1Meg reverse log pot for the bass control and I think it was labelled C1M as well. You can get replacements from G&L here: [url="http://www.glguitars.com/shopping/shopdisplayproducts.asp?id=19&cat=Potentiometers"]http://www.glguitars.com/shopping/shopdisp...=Potentiometers[/url] Maybe a little far to go for a pot, but that's the best I could think of. More digging: [url="http://gb.mouser.com/ProductDetail/Alpha-Taiwan/RV16AF-20-15S1-C1M/?qs=sGAEpiMZZMtxdMMi52izylTGUjbYbj7qlxlLC4Rw6Io="]http://gb.mouser.com/ProductDetail/Alpha-T...j7qlxlLC4Rw6Io=[/url] Split shaft si vous preferez: [url="http://gb.mouser.com/ProductDetail/Alpha-Taiwan/RV16AF-20-15K-C1M/?qs=sGAEpiMZZMtxdMMi52izylTGUjbYbj7qwXco89NuBrs%3d"]http://gb.mouser.com/ProductDetail/Alpha-T...qwXco89NuBrs%3d[/url] Edited May 14, 2010 by neepheid Quote Link to comment Share on other sites More sharing options...
Al Heeley Posted May 14, 2010 Share Posted May 14, 2010 Thanks - top digging there, I need to avoid mouser though as delivery charge is £12 for a £1.13 item, which is against my principals. Unless I can pick up some from ebay at reasonable cost i will go with a 1meg linear Quote Link to comment Share on other sites More sharing options...
JimBobTTD Posted May 14, 2010 Share Posted May 14, 2010 Banzai music in Germany - [url="http://www.banzaimusic.com/Alpha-16mm-FS-1M-REV-log.html"]http://www.banzaimusic.com/Alpha-16mm-FS-1M-REV-log.html[/url] Quote Link to comment Share on other sites More sharing options...
Al Heeley Posted May 14, 2010 Share Posted May 14, 2010 excellent, thanks Jimbob, great find, forgot to search banzai, my natural outlet for knobs of all sorts. Quote Link to comment Share on other sites More sharing options...
JackLondon Posted May 14, 2010 Share Posted May 14, 2010 Here ? [url="http://www.musikding.de/advanced_search_result.php?XTCsid=39234f691992d87833cb450a8ffe5743&XTCsid=39234f691992d87833cb450a8ffe5743&keywords=1m+rev+log"]http://www.musikding.de/advanced_search_re...ords=1m+rev+log[/url] Quote Link to comment Share on other sites More sharing options...
Alien Posted May 14, 2010 Share Posted May 14, 2010 If you can't find a 1M C taper pot, a 5M linear with a 1M2 resistor strapped across the track terminals it will give a very similar result. A Quote Link to comment Share on other sites More sharing options...
JackLondon Posted May 14, 2010 Share Posted May 14, 2010 They are not very common in UK (As are quite a few parts) but are easy enough to find in Europe, I might have one somewhere, I'll have a look tomorrow and let you know. Quote Link to comment Share on other sites More sharing options...
Daquifsta Posted May 15, 2010 Share Posted May 15, 2010 (edited) Here [url="http://www.musikding.de/product_info.php/info/p581_Alpha-Potentiometer-16mm-1M-rev-log.html"]http://www.musikding.de/product_info.php/i...1M-rev-log.html[/url] Edit: read the whole frickkin thread first before posting: facepalm. JackLondon beat me to it :-) Edited May 15, 2010 by Daquifsta Quote Link to comment Share on other sites More sharing options...
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