death by audio total sonic annihilation (again!)

[mongo]

Hi, I'm looking for a scem/layout for this.

I know the original has uses a DPDT and a search in the rchives gives me mostly tha t true by pass box with 2 3PDT or something.

  does anybody can help me? Thanx!

Andy

[cd]

We need to have a tutorial on how to use the search function effectively.  Found a link to this in under a minute:

[Marcos - Munky]

This one have a confusing (and a believe it's wrong) jack wiring. E-mail me for a worling schematic.

[remmelt]

Look here!

[cd]

This one have a confusing (and a believe it's wrong) jack wiring. E-mail me for a worling schematic.

Ideally the purple output jack wire should be connected to the blue switch wire.  Other than that, it's not true bypass or anything, and should work given the DPDT with LED limitation.  The one remmelt posted is a better implementation with a 3PDT.

[mongo]

thank you very much for all your answers!

Andy

[mongo]

in fact the one posted by remmelt is a true bypas box isn't it?? remmelt,could you explain a bit more about  the  SPST switch  you put in your box??


  Thanx!

Andy

[octafish]

The tsa is just a bypass box with a switchable loop that takes a pedals output and loops it back to the input. That is what the SPST in remmelt's schemdoes, then the amount of feedback is controlled by the pot (I use about 250k to 500k). SPSTs are cheaper than DPDTs but you cant use a led.

[mongo]

The tsa is just a bypass box with a switchable loop that takes a pedals output and loops it back to the input. That is what the SPST in remmelt's schemdoes, then the amount of feedback is controlled by the pot (I use about 250k to 500k). SPSTs are cheaper than DPDTs but you cant use a led.

ok,  but what's the correct schem then??  I'm sorry I'm just a slow learner. I can see that the schems on REMMELT'S page are different, I 'm afraid I need a Bit more of info.

I think that the ULTIMATE TSA schem needs to be drawn once and for all.

Andy

[nelson]

The correct one is remmelts schem. It is a True bypass box aswell as a switchable feedback loop, with an LED. If you want an LED to indicate when the feedback loop is engaged then use a DPDT toggle switch instead of the SPDT shown in remmelts layout and use the extra pole to ground an LED when engaged.


I am building one now....

been meaning to build one for ages......this thread prompted me too.


Dont get hung up on the Sonic annihilation...its just a feedback loop....

[nelson]

Finished building it........nice....getting an 808 bass drum thing going with the guitar volume knob and a proco rat.....aswell as the expected feedback...


build remmelts version...

[remmelt]

Thank you! Thank you!

I didn't really think there would be any usable sounds in the feedback loop, so I didn't make it footswitchable.

The third pole on the 3PDT can be used for an LED so you can see if the true-bypass function is turned on, I use this all the time to turn on multiple effects and it's a great development tool as well, because you can easily switch a breadboarded schematic in and out of your signal without attaching a switch! I love it for that.

The feedback is kind of fun to play around with once in a while, but I wouldn't miss it if it weren't there. Perhaps on those psychedelic groovetrips that last 2 hours... Perhaps.

There are two schematics on my page, the one with the thumbnail (drawn in Paint by me!) and the one linking to this site. The differences are:
mine has the feedback loop;
on this page the LED has been drawn in.

Combine and conquer! This is also a good build to help understand how to route all the different ins and outs and effect send and receive and LED - and + and grounds and sleeve-of-input, because it is exactly the same for any effect that you will build (or at least like most), except for that the effect is not on-board here.
Consider the feedback loop an extra. See how it feeds the output of the effect back into the input of the effect? Nifty, huh?