Also a resistor of 82K (on the power tube pin 5) has been used instead of the 1.5 K according to the schematic.I just realized you are using EL34. 5K6 is more commonly used on pin 5.
- The Dept pot-meter is already connected to ground. So that will be fine. But if I want to fine-tune the dept pot, by adding the missing resistor, do I have to use a special resistor for that? There are several different types in my amplifier?Let it be! There's nothing to do here.
- Where is the lamp in the schematic? The strange N symbol in the tremlo section or the X? Why do you advice not to connect? (PS; de X is not a cut wire)The lamp is the N2 symbol on the schematic. All it does is provides a lamp that flashes with the beat of the tremolo speed. If you just have to have it, get the proper neon bulb for that lamp holder. Don't forget the series resistor I mentioned earlier. The lamp is probably the same as in the power indicator. If you are lucky there will be a proper lamp already in the lamp holder. If there is, take a pic and post it here.
- I want to move the controls to the front of the amp (for cabinet making). Actually that is no more than a quarter turn. Is there anything I should think about / avoid?Terrible idea. This is a high quality build using high quality components. Even the sockets and terminal strips are high quality items. It would be a shame to hack it up!
- the resistor in the powersupply part is 5K instead of 8K2 (see drawing). I assume I need to check the voltage of A+, B+ and C+ after switching on the amp and thereby check the resistance?Let it be. Nothing to do here.
- What is your opinion of the amp? Is it build correctly? Can I / do you advise to adjust the amp locally?I'm very impressed with the workmanship and quality. The builder obviously knew what he was doing and took great pride in his work. Please don't hack it up. If you do, please don't post any hacked pictures.
A very happy man. I'm going to finish that amp.Looks like all you need to do is plug it in and test it.
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V3 socket... There must be a jumper between pin 1 and pin 8 for EL34 tube. Not shown on the schematic and I can't see it in the pics. Please verify.
82K is not harmful. It's just unusual. After seeing these nice pics I'm convinced that the builder purposely put that value on the grid. I just don't know why.I assume the 82K may be doing something to my volume and nothing to the sound. is that right?
I agree with sluckey, the lead dress and circuit installation is just outstanding. I keep looking at those threaded mounting brackets and the way he has got those located, I can't help but think he had something special in mind to mount this chassis to. Did he leave any indication on that? Platefire
Speakers will make whatever you put through them sound awful, unless they’re mounted in a cab.