CHASM REVERB

[deadastronaut]

hi sam, i think mike means 'decay' ...(feedback)

it is working as it should be.

he was just commenting on the amount of /decayfeedback still at minimum...inherent to the large brick.

but can be tamed better with the damp.

[haveyouseenhim]

Nice demo Mike.
I'm pretty sure you sure you should get no wet signal (reverb) bleeding through in tails bypass once the feedback has done its thing - Rob can confirm this I guess.
It might be that FET 1 is not closing properly on bypass. You may want to try another FET and also make sure the gate is pulled to ground when bypassed.

I'll give that a try. After I switch it off when it is oscillating It will keep going and not taper off.

hi sam, i think mike means 'decay' ...(feedback)

it is working as it should be.

he was just commenting on the amount of /decayfeedback still at minimum...inherent to the large brick.

but can be tamed better with the damp.

That wasn't what I meant when talking about the tails. I'm ok with the minimum reverb. It's just that after I bypass, it will keep going till i turn the decay down

[deadastronaut]

it shouldn't keep going , especially in non osc mode...sure you have a 47k/100k on that switch?.

non osc mode will fade it off nicely even at max...

[haveyouseenhim]

Yea. It will fade nicely in non osc. With osc and decay at full it won't taper off when tails is engaged.

[deadastronaut]

thats right then...

it should tail off at around 2'0 clock though in osc mode.......osc mode is for tweakable osc..

i left it at that for osc nutters..

but had the non osc so it could be maxed without osc..


edit: 100k is non osc / 47k is osc... so you may want to up the 47k to be more controllable in osc mode..depends how crazy or fadey you like it..

[samhay]

That wasn't what I meant when talking about the tails. I'm ok with the minimum reverb. It's just that after I bypass, it will keep going till i turn the decay down

gotcha - that's a design feature.

However, if the TBP footswitch ends up being unusable, you could swap it out for a momentary SPST that shorts lugs 1 & 2 of the feedback/decay pot. You could then stomp on it when you want to kill the oscillation and it will momentarily turn the feedback all the way down...

edit - disclaimer: I haven't tried this, and the change in impedance (of the decay pot) may do something funky. Worth a try with an aligator clip though.

[deadastronaut]

^ yeah, good idea.

[haveyouseenhim]

gotcha - that's a design feature.

However, if the TBP footswitch ends up being unusable, you could swap it out for a momentary SPST that shorts lugs 1 & 2 of the feedback/decay pot. You could then stomp on it when you want to kill the oscillation and it will momentarily turn the feedback all the way down...

edit - disclaimer: I haven't tried this, and the change in impedance (of the decay pot) may do something funky. Worth a try with an aligator clip though.

That's what I was thinking about doing with the huge gaping hole where the TBP switch was. Or even adding the LFO from the shoot the moon trem into an LDR on the volume or damp pot to have a lil tremolo in it too.

[deadastronaut]

squeeze a delay in there...

[haveyouseenhim]

squeeze a delay in there...

I could throw pickdropper's smd DBD in there      But I won't because I took my psych meds today 

[haveyouseenhim]

I just did a lil test with adding an LFO. I put an LDR on the volume pot with alligator clips and used the shoot the moon trem LFO into it and it made a pretty cool sound. I'm working on putting the LFO on a piece of vero and squeezing two more pots into it to control depth and speed.

[jkokura]

Like.

Jacob

[haveyouseenhim]

Chasm reverb with added LFO:

https://www.youtube.com/watch?v=8BW7x2XW8NE

[deadastronaut]

@mike: aha you nutter , you did it....and found a way to fill that hole up too ....nice one man.

[selfdestroyer]

Chasm reverb with added LFO:

https://www.youtube.com/watch?v=8BW7x2XW8NE

Amazing sounding. Superfuzz wall of sound would go nicely with this thing.

[therealfindo]

Has anyone managed to fit this into a 1590B enclosure?

[thanal9999]

Here is my built of The Chasm Reverb...
It works great and it will be for sure on my pedalboard for a loooooong time...
special thanks to deadastronaut an the other guys who helped for this design... 

[Jdansti]

Nice art and guts! 

[deadastronaut]

Cool build man, ...

[therealfindo]

Has anyone managed to fit this into a 1590B enclosure?

Is it doable? The current pcb would fit, theoretically, but the jacks would be problematic... I'm still rubbish at pcb layouts, but does anyone reckon it could be rejigged to a 1590B or 125B friendly size?