Tube Amp Archive

Here is a 440Hz square wave. Sine or ramp wave produces nothing (not much of a surprise, as it is the hard attack that produces the issue).

I will try a square wave and see what I get. Problem is, it happens with a guitar so it has to work with a guitar. It happens with any kind of a guitar (Strat, LP, p90). I agree, a filter is only a band aid. But believe me I have spent dozens of hours ripping this thing apart. About the only thing I...

Tons of ways to do effects loops. The easy (and some consider it bad), is to simply put a send/receive jack right in line with the input of the PI. Problem is that is causes impedance mismatch with your effects, but what the hey - if it is good enough for Dr Z why not give it a try? Easy enough. If ...

Me too. I am interested in his class A/AB switching.

If you buy a PC based scope, it will come with software that'll run on your PC. Here is bitscope. They have an online demo you can play with. http://www.bitscope.com/ Here is pico scope software that comes with the pico scopes http://www.picotech.com/picoscope-oscilloscope-software.html Contrary to ...

I have had as oscillation problem in one of my 4 x EL84 amps for quite a while. Finally I took the time to try and track it down. The oscillation is a little tiny thing that tacks itself onto the front end of the wave form when the volume is up loud and a hard not is plucked. Problem is that the pow...

I have both an analog scope and a couple of PC based scopes. I really like the PC based scopes for the following reasons: - easy to share with others - spectrum analysis is quick and easy - easy to save the pictures for diaries and log books. I used a bitscope for a while, but now I have purchased a...