Reverb phasing

[luthierwnc]

Hi Guys;

I am messing with another design (not the one of my recent thread) and looking at the phase relation of the reverb signal to the dry. Like a lot of us, I cut my teeth on Fenders where the number of times the dry signal changes phases (net plus or minus) is matched on the wet side.

On Ampegs it doesn't. I've also got a couple '59-type schematics where the exit point is at the cathode follower and the reverb is reinserted at the bottom of the phase inverter. The reverb circuit is the same but the amp adds a switchable gain stage on the dry side. A circuit I really like is the tweed reverb on JC Maillet's page which seems to add an unnecessary triode to get the + - count back to square.

Bottom line, once the signal has been squiggled in the tank, does it matter what the original phasing was?

Thanks again, Skip

[6267]

It won't cause positive feedback oscillation or anything (most of the time...there's probably a way to do it if you tried) but it might sound different.

[Enzo]

I can't imagine trying to determine a "phase relationship" between the dry signal and the output from the reverb. What is the phase relationship between a toaster and the floor mop? Electricity and signal travel through 10" of wire in a nanosecond. The reverb signal travels through the spring mechanically at about the speed of sound So whatever waveform was in the dry signal could have gone all the way around this earth we live on by the time anything came out the far end of the reverb spring. And when it comes out, it is not the same waveform anyway.