Any way to take this OUT of the circuit?

[analog]

I am a noob, and want to know if there is any way to take this trem out of the circuit in this design? It seems like it is a part of the phase inverter and bias. is there a way?

[Enzo]

Hi, welcome to the place. ANy chance you can post or link the schematic? I don;t want to have to trace out the circuit from this. It LOOKS like you would connect together the wire from the center of the intensity control and the wire to the left terminal of it. Taking them off the control of course. That would free up half a tube.

[Wilder Amplification]

Here we go...standard cathodyne PI w/bias tremolo -



Looks like if you remove the wire going from the center terminal of the intensity pot to the 220K grid leak resistors, then relocate the wire on the left terminal of the intensity pot to the junction point of the 220K grid leaks that you removed the first mentioned wire from you should be good to go. Maybe disconnect the 220K plate resistor that connects to pin 1 of V4 to disable the LFO stage as well.

[Enzo]

Thanks Jon. I was actually trying to convey the message that a layout is not a circuit, and while this case was not too complex, in general it is preferable to link a schematic for a technical discussion. In my opinion of course. The underlying thing being my distaste for the Gerald Weber school of amp modification. That being where you show a pictorial and provide instructions like move this here and that there, and change this to that. At the end one has accomplished the change the mod represents without having learned a darn thing about the circuit or why the mod works. Plus that then opens up the discussion of whether he wants to just disable the trem, or remove it completely, as in every part involved, not to mention the purpose behind that? Are we expecting to build this with one less tube or something?

[Wilder Amplification]

Thanks Jon. I was actually trying to convey the message that a layout is not a circuit, and while this case was not too complex, in general it is preferable to link a schematic for a technical discussion. In my opinion of course. The underlying thing being my distaste for the Gerald Weber school of amp modification. That being where you show a pictorial and provide instructions like move this here and that there, and change this to that. At the end one has accomplished the change the mod represents without having learned a darn thing about the circuit or why the mod works. Plus that then opens up the discussion of whether he wants to just disable the trem, or remove it completely, as in every part involved, not to mention the purpose behind that? Are we expecting to build this with one less tube or something?

I wholeheartedly agree with you on that. Too many guys out there "assembling" amps via "paint by numbers" layouts and call themselves "builders" yet all they're doing is "blindly assembling" without actually knowing what it is they're doing or learning what they're doing for that matter.

Unfortunately we techs mention this and we get flamed for being "holier than thou" as if we were born doing this stuff and think we're better than everyone else because of it. These people forget that we took the time to learn the theory of what really does what ELECTRONICALLY rather than a "do this, change that" mentality that lends itself to supposed "mojo and magic".

I admire and am more than willing to help those who have the drive and desire to actually learn the electrical/electronic side of things and the science behind it. But like most people who find it easier to change components to get better tone than it is to actually learn how to play we now have a plethora of people who have the false impression that they can now be "instant techs" with the advent of paint by numbers layouts.

I use layouts myself but more to speed up the build than anything. But I design all of my layouts off of a schematic which is a skill in itself, and in order to do that one must know how to read a schematic which requires knowledge of electron flow and how the various circuits work.

[Enzo]

Too late for me, I guess. Just today another thread has opened up with a Weber layout as the basis for a question on how to convert it to channel switching.