Emmm, no. You are commenting foolish things.

Not foolish in itself, actually it could be an obvious solution, you are correct. But foolish when considering the overall circumstance .... That you don't know about .... Because I did not describe .... Because I have no time to describe in full .... But why would I do so anyway ..... When I am only asking if you know an expert ... I clearly expressed this (I guess) ... And leave it for us to deal with this problem

Phew...

 

Wow, I never wondered my mentionning about the valuable HiFi stuff that I own for reference will make you so greedy that you will be campaining with this foolishness in all my future threads. Do you want me to send you a pair of those speakers? I saw that whole thing put you under serious stress.

 

Accused of being a troll.
Laughs at the accusers while trolling.

OK, bro! Have phun!

 

I will, don't worry. Lot's of fun here all the time, that's why I am coming back! Will guarantee that for you! My Christmas gift for your whole year!

 

Well, that sounds good. I can only swap the tube in January because I will only have a proper soldering tip then, but I wouldn't mind if it worked like that for me, too. The only thing I worry about is that it will change the behavior of the compression. I hope it will not be the case, or not in an unacceptable way. We'll see, but it's worth a try because I like that compressor very much and haven't found an alternative of it yet.

 

To build a "pad" but avoid large noisy serial resistors on the input, take a good JFET input op amp powered by +-18 volts as a unity gain buffer (non inverting amp) with a 1 meg resistor to ground on the input, feed a 10k log potentiometer to change gain from -inf to unity, and a second op for a low-z output stage. Nothing easier than that, doesn't change sound due to it's fixed 1 meg input impedance, clips at +24 dBu, you surely won't find any pickup that hot. Can be built by anyone who can hold a soldering iron.

 

That's really hard to say without knowing if the tube is part of the compression circuit. Do you happen to have a circuit diagram of it?

Edit: Found a mk1 schematic of the Optivalve and it's an LDR based compressor which only uses the tube for buffering, so it should work.
Mind you though, the ECC803 will have somewhat lower gain than the 12AX7 which can matter if your pedal input gain setting needs to be close to maximum already.

 

Last edited: Dec 26, 2024

Yeah but in connection with the distortion problem, that can actually be useful, isn't it?

 

What is Low-z? Blanced?

Is there any schematic available for such a buffer or at least similar that can be modified?

 

Ok, the crew who use the site below are all over the kind of kit issues you're obsessing over:

https://groupdiy.com/

If you can't get the expert help you need there, you really are nothing but an idiotic troll.

 

Not balanced, but low output impedance/resistance, so it can drive anything connected, from hi impedance pedals to studio gear with input transformers and so buffer the guitar signal.

It's a basic op amp circuit, nothing there to "modify". https://www.electronics-tutorials.ws/opamp/opamp_3.html

 

didnt read all the comments. watched the video and......

you do know that "GAIN" is NOT "Volume" right?

 

I would give it a try for sure!

 

"Clickbait Master"????

 

Can't ask there. I was banned there for trolling.

 

Do you know that 1 week is 7 days, right?

 

it is? shut up you dont say thank you wow mind blown!!!!

BUT a week and seven days are the same thing

Gain and volume are not. yes gain adds volume but that is just to drive an amp circut to get distortion.

id explain more but you obviously know it all so ......

 

Paradoxical behaviour... Maybe?!

 

This is what some headlines look like today:

Psychologists warn: We have forgotten how to listen! We no longer listen properly – whether in conversation or on a social level.

Bla Bla Bla
We don't listen: everyone just wants to talk, talk, talk - and turns a deaf ear as soon as others speak. Why?

 

At the op. I didn't sit to read the whole thread. Too much drama hehe. I just saw your vid. It is obvious that the valve comp adds some drive to the signal because VALVE mate. The Carl Martin pedal sounds like being a transistor/solid state based comp/limiter and therefore is as clean as it gets. I find np with either device. It is a matter of choice and taste.
Oh and next time you make a video, play the fkn guitar properly please and not gibberish. Demonstration purposes always imply you play the same lick over and over with different settings so the listeners can decide what gives. Cheers.