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Of course the new 6EU7s did absolutely nothing. So went on to try many things and finally I got to the 470K resistor on pin 5 the grid of the 6EU7 where the...
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No the switch never worked properly. It would work sometimes then the amp would stop passing signal. I don’t know what the original wiring is supposed...
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This amp is still unstable, going into oscillation and turning off. I ordered a couple of 6EU7s to finally see if that’s the issue. I’ll be back...
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Yes it’s node E 100V.
But node E is not the 10uf cap, it’s the 5uf. This voltage comes from the main power supply on the other side of the...
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With reverb off V3B plate is 60vdc and when switched on it’s 0vdc. Pin 6 of V2 there’s 50vdc with the reverb turned on and 0 when off.
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Ok I have to wire the switch back to where it was before like in the picture....
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You are correct about the H and L ch being connected, I admit I didn’t notice that. I still don’t understand why there are connections to V3b...
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Oh hell the oscillation is still there, it’s just different. As I turn the reverb up it feeds back,,, a lot. This is such a weird design, about 100v...
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I figured out that eliminating the reverb switch the amp works, no cutting out. What I did was first disconnect the switch and applied voltage to both of...
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The .01 cap was one of those small turquoise type. But interesting you brought this up. I did find that when I tapped a lot with a chopstick the amp would...
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Just gave this a try. It held up for a couple of taps with the probe then cut out. I also went and tried a 470p cap, same thing....
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Premier 100r cutting out
This amp is doing something really strange. It works great sometimes then it doesn’t pass signal at all. I’m having a very similar problem that...
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It went from bad to worse. I’m getting very little signal, I’m putting it back to the original components and call it quits. The amps are piling...
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I set up a breadboard with the NSL32 and Vactrol and I put 100K resistor and switched in a much lower value resistor in series with the 100K across the photoresistor...
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The LED gets bright when plucked and is brighter as the gain pot is increased and as to the strength of the pluck....
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This is a little different on this particular mutron, there is no A6. There’s a transistor with white(or silver) dot on the top of it, it’s located...
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Thanks for this. I made the change of the trim pot to 1k and 220R resistor. Now there’s loud siren noise the comes and goes along with the sound from...
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It looks like this mu-tron III is an early model, I think. The ICs are the round top type and there is an old TO92,? These can be seen in the picture I posted...
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It measures open on the resistor side. The led side might also be gone . I replaced it with the NSL32s and the effect sounds like it’s on the verge...
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