backwater Posted February 1, 2008 Share Posted February 1, 2008 (edited) I found these in a tool box today while searching for something else. They are bias tools for biasing valve amps - basically plug the tool in where the valve would go, plug the valve into the tool and connect a multimeter. Made by a company called SRS in America I bought these about 18 months ago as I had a Marshall JCM800 valve head and a friend had a H&K valve amp so I needed to bias them. I bought them from America and by the time they were delivered I had sold my JCM800 for a DSL401 (which has bias points built in) and my friend had sold his valve amp so I have never used these! The one at the left of the picture is for a single EL84 (or similar) valve while the right one is for two EL34's or similar. [attachment=18254:bias.jpg] I recall paying around £75 for the pair when I bought them (by the time I added postage, tax and Parcelfarce's charge for collection the tax). I'm looking for £18.00 for the EL84 one and £33.00 for the EL34 one including UK postage. I can accept paypal. Please contact me if you want to know more, want to ask questions or make me an offer. Thanks Andy Edited January 21, 2009 by backwater Link to comment Share on other sites More sharing options...
ped Posted February 1, 2008 Share Posted February 1, 2008 Very interesting. I would snap your hand off but my amp has a visual bias system comprising of some fancy LEDs but I would have found this good fun otherwise. Quite a rare piece of kit I should imagine? Actually I know someone who may well be interested in these, I will check. Cheers ped Link to comment Share on other sites More sharing options...
backwater Posted February 8, 2008 Author Share Posted February 8, 2008 BUMP Both tools are still available. Andy Link to comment Share on other sites More sharing options...
The Burpster Posted February 8, 2008 Share Posted February 8, 2008 Damn it, if it was for 12AX7s I'd have had it..... Poo damn bugger! Link to comment Share on other sites More sharing options...
backwater Posted January 8, 2009 Author Share Posted January 8, 2009 BUMP. I still have these and I'm open to reasonable offers on them, (Just found them in a toolbox as I forgot I had them!) Andy Link to comment Share on other sites More sharing options...
nocaster Posted January 21, 2009 Share Posted January 21, 2009 [quote name='backwater' post='374456' date='Jan 8 2009, 09:17 PM']BUMP. I still have these and I'm open to reasonable offers on them, (Just found them in a toolbox as I forgot I had them!) Andy [/quote] Andy, I'm a new member here but have been posting on Musicradar for donkeys. I found this via Google and I'm DESPERATE for the probes you're selling. Are they still for sale? I live in Fife but work at the Gyle. Can meet with cash whenever suits as I need these ASAP! Long story! Regards Kev Link to comment Share on other sites More sharing options...
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