SpiderWars
Well-known member
A long time ago I built this Dumble ODS inspired amp. Mercury Magnetics mistakenly sent me a Hiwatt 50W clone OT and I already had this Hammond PT from another project (my first Marshall build) and a bunch of other random parts so naturally I had to design the most complex amp I could muster at the time. All the layout is my own but borrowed heavily from whatever I could. The footswitch only changes channels (or pull Clean Master) but there are LEDs on the front for each channel. I obviously never really completed it as far as faceplates but it works great. I just pulled it and modded it after years of 'learning' and it sounds quite good now. I don't know WTF I was thinking with some of the circuit values I had in there. It was a honky, nasally mess. I went pretty crazy with the shielded wire too.
A face only a mother could love. I wanted an HRM OD circuit but wanted those controls on the outside. I then made the PAB circuit (which essentially bypasses the early clean tone stack) automatically switch when you switch channels. This helps alleviate the tubbyness in OD that can happen from that early tone stack and also makes the amp look to the user like a 2 independent channel amp except for that first Volume control which is still shared.
This is the only amp I've preferred KT77 in. And these JJs are the only ones I've got. Built-in 'Dumble-ator' tube buffered FX loop with Send Level.
A face only a mother could love. I wanted an HRM OD circuit but wanted those controls on the outside. I then made the PAB circuit (which essentially bypasses the early clean tone stack) automatically switch when you switch channels. This helps alleviate the tubbyness in OD that can happen from that early tone stack and also makes the amp look to the user like a 2 independent channel amp except for that first Volume control which is still shared.
This is the only amp I've preferred KT77 in. And these JJs are the only ones I've got. Built-in 'Dumble-ator' tube buffered FX loop with Send Level.
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