Roob Posted February 21, 2009 Share Posted February 21, 2009 Hi there, I was contemplating how to get more power with my current Sessionette 100 combo, so was going to pickup a used Ashdown MAG 2x10 or something similar, however, upon going to my amp to check the ohms rating etc, I found this... [url="http://entertainment.webshots.com/photo/2058671560104651961QQOIXW"][/url] So before I get to buy any new kit, I need to find out what i can do about the old kit. The knob has clean broken off, and I've no idea where I might find a replacement, any ideas? It was built in April 1985, so I suppose it's about time something broke off This is the underside of the knob... [url="http://entertainment.webshots.com/photo/2010492820104651961lMkxbY"][/url] Any help would be much appreciated Roob Quote Link to comment Share on other sites More sharing options...
BOD2 Posted February 21, 2009 Share Posted February 21, 2009 On the face of it, it should be fairly easy to fix. Are you handy with a soldering iron - would you be doing this yourself ? What you'd need to do is access the solder side of the circuit board, undersolder the 3 contacts for the pot and remove it from the board. Once remove you can establish the value of the pot - you can use a meter to read the resistance between the two out tags of the pot, ignoring the middle one. Then it's a case of identifying a similar component and replacing it ("refitting is the reverse of removal", as they used to say in the Haynes car maintenance guides). Removing the pot will help identify the component properly. These should be availabe from ... [url="http://www.maplin.co.uk/searchtemplate.asp?criteria=POTENTIOMETER%20ALPHA"]http://www.maplin.co.uk/searchtemplate.asp...IOMETER%20ALPHA[/url] [url="http://cpc.farnell.com/"]http://cpc.farnell.com/[/url] Quote Link to comment Share on other sites More sharing options...
Roob Posted February 21, 2009 Author Share Posted February 21, 2009 Ah, excellent. Yes, I have a couple of soldering irons kicking about, used to do alot of soldering. Never soldering anything quite like this though, so thought I best check before I make it worse Thanks for the links, might pop into maplin store and pickup a couple and some spares if possible. Provided they have them, they always seem to be missing what I need when I go in store :|. Quote Link to comment Share on other sites More sharing options...
stingrayfan Posted February 21, 2009 Share Posted February 21, 2009 Tried contacting Session themselves? They might have spares, you never know. They're only in Basingstoke. [url="http://www.award-session.com/"]http://www.award-session.com/[/url] Quote Link to comment Share on other sites More sharing options...
Roob Posted February 21, 2009 Author Share Posted February 21, 2009 A valid point, I have just sent them an email, will see what they can do for me. Quote Link to comment Share on other sites More sharing options...
BOD2 Posted February 22, 2009 Share Posted February 22, 2009 If you can't find the exact same "pattern" of pot that will fit into the PCB it's quite acceptable to use a standard pot and solder short "leads" from the PCD to the tags on the pot. You can actually use short lengths of stiff wire for this very successfully (I once bught a commercial mod for a small guitar amp and that was the recommended technique). Quote Link to comment Share on other sites More sharing options...
Roob Posted February 22, 2009 Author Share Posted February 22, 2009 Luckily I was able to find a direct replacement at Maplins. Although, when I looked at the circuit diagrams from the Session website, and it showed a 10k lin pot, whereas the one I removed was a 2M2, or something. Bought both and installed the 2M2, and it worked fine. Just need to pick up a knob and cap to put on the rotary stalk bit now, would be nice to get an original to match the other 2, but not sure how likely that is. Thanks for the help everyone! Quote Link to comment Share on other sites More sharing options...
BOD2 Posted February 22, 2009 Share Posted February 22, 2009 Well done ! I think that looks like a "collet knob" with a coloured cap. It might be tricky getting the exact knob colour - also check the size required. Maplin do them in black... [url="http://www.maplin.co.uk/Module.aspx?ModuleNo=1827"]http://www.maplin.co.uk/Module.aspx?ModuleNo=1827[/url] Or CPC Farnell do have a grey range ... [url="http://cpc.farnell.com/jsp/search/browse.jsp;jsessionid=RKUIWCHYWCVGQCQLCIPJK0Q?N=411&Ntk=gensearch_003&Ntt=collet+knob&Ntx=&suggestions=false&_requestid=547410"]http://cpc.farnell.com/jsp/search/browse.j...equestid=547410[/url] Quote Link to comment Share on other sites More sharing options...
moonwarriors Posted February 22, 2009 Share Posted February 22, 2009 here's a circuit diagram incase you need it at any point...still have a compact 100 1x12 love it for smaller gigs cheers stuart Quote Link to comment Share on other sites More sharing options...
Hamster Posted February 22, 2009 Share Posted February 22, 2009 [quote name='Roob' post='416238' date='Feb 21 2009, 05:00 PM']A valid point, I have just sent them an email, will see what they can do for me.[/quote] I don't know if you've had a reply from Session, but I might be seeing Stuart (the owner) on Thursday night if you want me to ask him about it. Quote Link to comment Share on other sites More sharing options...
Roob Posted February 23, 2009 Author Share Posted February 23, 2009 No reply yet, but if he has any spare knobs he can pop in the post that would be great! Quote Link to comment Share on other sites More sharing options...
geoffbyrne Posted February 26, 2009 Share Posted February 26, 2009 (edited) FYI A while back I tried to get on to the website but found something in it's place, so I rang the phone number given in the ad. How surprised was I to find The Man himself had picked up the phone. (turned out his site had been hi-jacked) Very easy & nice bloke to talk to. I've kept an eye on Session stuff ever since. G. Edited February 26, 2009 by geoffbyrne Quote Link to comment Share on other sites More sharing options...
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