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Title: Two Rock Schematic.... Thoughts? Post by: nudefish11 on February 09, 2012, 05:08:47 AM Hi guys
I found a two rock amp schematic over at the ampgarage and apparently there isnt too much difference between the OTS and the Custom Reverb Signature........ Have anyone tried to do this?? Thanks for your time guys! Title: Re: Two Rock Schematic.... Thoughts? Post by: nudefish11 on February 09, 2012, 05:11:53 AM This is what a amp repairer in adelaide said!!!
"The Two Rock mods are really easy to do (replace 8 resistors with the values shown on the German schematic). But adding a reverb could be problematic. I can see where one new valve socket could fit on the chassis layout (between the power valves and the pre-amp valves, there is a space, except the speaker sockets stick into it, so maybe not enoughfor a socket and tag strips. But we need to find space for another new valve socket as well as a small transformer, and it's not obvious where they could go. The transformer could fit on the bare space behind the valves, but that requires moving the pre-amp out of the way to drill mounting holes and holes for the wires - that's do-able but fiddly. I think there is a hole under the OD Trim control on the rear panel where a Mix control could fit, but I really can't see where the second reverb valve could go. Maybe what I can do is the Two Rock mod, which would take an hour or so and cost $5 in parts, and while the amp is opened up on the bench, see if I can find the real estate for the rerverb hardware and circuitry. At this point, I need to eyeball the real chassis to see how the internal layout uses the space. Based on the drawings for your amp, I can't judge exactly what the dimensions are for the possible spaces, so I'd rather not try to quote at this time. The lowest risk solution is to build a stand-alone reverb in a separate enclosure, and feed it into the amp using the FX loop. That solution would require a separate box for the reverb tank and the reverb circuitry. The power requirements could be slaved off the main amp, so the main cost would be a separate enclosure to match the main head, plus a small chassis, the reverb tank, and the reverb circuit (which would include a footswitch, enclosure, cosmetics, slave power wiring etc... )" Be great for some advice guys Cheers Title: Re: Two Rock Schematic.... Thoughts? Post by: boldaslove6789 on February 10, 2012, 04:25:26 AM Your better off sourcing your own parts. Get a Twin Reverb Transformer set, a 24" blank chassis from Watts Tube Audio, and get a headcase built by Taylor @ Amplified Nation.
A Custom Reverb Sig is basically a Dumble ODS #102 with 2.5 tube Reverb and a half of a Dumbleator on the remaining triode. You'd be better off using the #102 layout and add extra B+ nodes for a 2 tube Reverb and Full Dumbleator circuit. Here's some links that will get you started: http://ampgarage.com/forum/viewtopic.php?t=12873 http://ampgarage.com/forum/viewtopic.php?p=182919&highlight=#182919 http://ampgarage.com/forum/viewtopic.php?t=10357&highlight=124 |