CHASM REVERB

[deadastronaut]

lets have a look at your board...

full pic of all components please...

[gcol]

https://www.dropbox.com/s/kuqe1m7knxtn052/IMG_6563.JPG?dl=0

EDIT; one of the legs of the REG1 snapped so i just soldered them to the board with wiring

[Philthy]

any pics of the underside?

[Fndr8875]

Is an etchable pcb still available? I got one of DA tremshifters a while back,,,i messed it up real good lol,, little later i was able to solder messed up joints to the traces..sadly it cuts in and out. I need some reverb bad now

[daz061]

why not just buy a fabbed board

[Fndr8875]

moneys to tight with the cost of the brick, plus enclosure etc...i support DA, i bought a tremshifter from him even though theres an etchable layout on effectslayout site. Think im just gonna grab this used beheringer digial reverb locally off craigslist for 20 bucks. When i have more money ill order one a pcb, did u buy one?

[daz061]

ye i got 1, cool board

[deadastronaut]

Was just thinking on gcols problem,

if you feed 9v into the 5v side of a 7805 what comes out of the 9v side  ? ...hmmm..
just thinking about his brick

[vigilante397]

Was just thinking on gcols problem,

if you feed 9v into the 5v side of a 7805 what comes out of the 9v side  ? ...hmmm..
just thinking about his brick

I think that will probably just fry the 7805. They can be rather fragile voltage wise.

[deadastronaut]

cheers nathan, yeah thought it wouldnt be good, but you never know eh..

so he is best off replacing it..and may have fried his brick then??....

[vigilante397]

so he is best off replacing it..and may have fried his brick then??....

Unfortunately yes. Regulators are cheap but when they go the brick often follows. In my experience if you hit the wrong pin of the 7805 with 9V in the regulator shorts and basically turns into a wire, which means you're getting 9V to the supply of the Belton brick, which can quickly turn a reverb brick into a literal brick And yes, this is from experience

[deadastronaut]

oops!..from the horse's mouth then...cheers nathan,

i'll prob sacrifice a 78l05 just for the laugh...n test..

[bluebunny]

i'll prob sacrifice a 78l05 just for the laugh...n test..

Video please, Rob.  With all the post-production trimmings, of course.   

[Philthy]

Hi all,

Can someone please confirm the oscillation switch is either a:

a)  on-off-on SPDT, and if so,  is there a funciotnal difference between to the two "on" settings; or

b) on-off SPDT.

thanks

[deadastronaut]

hi philty,

i used an SPDT ''on off on''

but you can use an on/on..

there are no functional differences.

[Philthy]

If I wanted to wire the Chasm permanently on, do I need to do anything with the fs1 and fs2 pads? eg: jumper them

[bluebunny]

You need to wire one to 9V and the other to ground (in order to turn on and off the respective JFETs).  I'm on my work PC, so I don't have access to any schematics or diagrams, so I can't say which is which.  But Rob will be along shortly to clarify.  But don't short just short FS1 and FS2 - it won't do anything.

[Philthy]

I think I worked it out from the schematic - fs1 to 9v and fs2 to ground. Appreciate confirmation of this Rob.

[jotp12345]

  The decay control in osc-off doesn't change anything, but changes a lot in osc-on, where it really impacts the feedback. How should I fix it? Thanks.

[wbgarman]

I'll be starting a Chasm Reverb build in a few weeks, but I'm wanting to add a 'Hold' feature to the circuit in order to play bypassed notes on top of the trailing reverb effect (essentially have the reverb effect continue (pedal still switched 'on'), but play clean notes that bypass the reverb effect while a momentary switch is depressed). Is this possible with the addition of SPDT momentary switch at the beginning of the effect circuit or should another method be utilized?

Any insights or suggestions on how to achieve the above are appreciated!