How to add the dry signal to this reverb circuit?

[townville]

Here's the Blues Junior reverb circuit.
https://imgur.com/a/CRwiude
Assuming I have a dry signal wire, how would I make it so that the "Reverb" pot is a wet/dry mixer instead, so that I can get wet/dry out of a single wire again? Where would I add the (bypassing) dry signal to this schematic?

[pompeiisneaks]

Although I may be misunderstanding your request, the blues jr reverb takes a clean signal, adds reverb and then lets you use the 'reverb' potentiometer to decide how much of the reverb signal to insert into the main dry signal. I.e. the circuit already does what I think you're asking. If you have the reverb pot set to 0 that should mean in theory none of the reverb mixes in with the clean signal, as you dial that up, some percentage of the reverb is added in with the dry signal. There's a 220k resistor from the clean signal into the PI input, and a 470k resistor from the output of the reverb's pot to the same point. If you wanted more of a 'balance' pot I guess you could disconnect both ends of hte 220 and 470k resistors and connect each to the opposite ends of another pot of some value and have the middle then connect into the PI. I don't get what you'd gain from that, though, as basically you already get a 'mix' control with the reverb as is.

~Phil

[townville]

Although I may be misunderstanding your request, the blues jr reverb takes a clean signal, adds reverb and then lets you use the 'reverb' potentiometer to decide how much of the reverb signal to insert into the main dry signal. I.e. the circuit already does what I think you're asking. If you have the reverb pot set to 0 that should mean in theory none of the reverb mixes in with the clean signal, as you dial that up, some percentage of the reverb is added in with the dry signal. There's a 220k resistor from the clean signal into the PI input, and a 470k resistor from the output of the reverb's pot to the same point. If you wanted more of a 'balance' pot I guess you could disconnect both ends of hte 220 and 470k resistors and connect each to the opposite ends of another pot of some value and have the middle then connect into the PI. I don't get what you'd gain from that, though, as basically you already get a 'mix' control with the reverb as is.

~Phil

Thanks Phil -
The issue is that I don't have a Blues Junior amp - I'm planning to add this circuit in-line to a guitar signal, and this schematic alone puts either all the signal through the tank, or sends no signal at all. So I'm hoping to use this single pot as a wet/dry mixer instead of an "add/don't add". Does that make sense?

[sluckey]

See pic...

BJ_reverb_mixer.jpg

[pompeiisneaks]

So per sluckey's pic, you can see exactly what i was explaining, and what you could do with some kind of 'pedal' if you will. If you're trying to just make an inline reverb like that, it should usually go in the effects loop, unless your amp is always clean... then you could put it in front of the amp, inline with the guitar... (these are suggested rules, but people break them to great effect all the time... so YMMV).

Often, though, the biggest complaint about solid state reverb, even with a pan, is that it doesn't sound the same as a real tube driven one... I never liked the reverb in my old blues deluxe that was very similar to this setup, but loved ones I've heard that are true tube driven reverb.

~Phil