ROG Splitter-blend problems.....

Started by strangeways, December 08, 2007, 03:56:16 PM

Previous topic - Next topic

strangeways

Hello,

So I have been having a hard time getting this thing going.  I have built a total of 3 parallelyzer circuits and now the ROG splitter blend.  All of these pedals have had the same problem and I am stumped.

What I am trying to accomplish is a blendable loop that send the guitar signal in and out for channel  one (essentially guitar in/loop out/loop in/output for the first channel.  The second channel has a delay in it so it goes guitar in/loop out/delay/loop in/output for second channel. The idea is to be able to switch to the delay, lay down a phrase with the delay having a long decay, then switch back to channel 1 and play over the decay. 

My problem is I am getting a faint delayed signal of the notes when I am playing on channel one when the delay pedal in channel 2 is on (crosstalk, I believe).  Any ideas?

I used this schematic for the splitter-blend (didn't have any 224 caps for input/sends so I used 104 caps instead)-
http://runoffgroove.com/splitter-blend.html

I built it breadboard  just like the ROG layout and have tried several grounding schemes, both general guitar gadgets style and tonepad, to no avail.  The only solution that sort of works is to use a 3pdt switch to ground out channel 2 loop send, but that causes a slight lag/click in signal.  To accomplish this I have the channel 2 send hooked up like this...


       Channel 2 Input ----     ----     ---- Loop/channel 2 Send to Jack
       Guitar Input       ----     ----     ---- Loop/channel 2 send from Board
       Channel 1 Input ----     ----     ---- Ground to Input jack

This seems to work best in getting rid of the crosstalk, but the drop/switch noise is not going to pass.  I plan on using the middle poles for LED's, but that's once I can get these kinks figured out.  I have tried 2 different switches, both of which are the blue cheapie 3pdt from smallbear. I have the channel 1 loop bridged internally on the board via a jumper.  Could this be the problem?

Thanks in advance for any suggestions?

Daryl

strangeways

Anybody?!?!  I know others have built this pedal. 

Any helpful hints would be much appreciated.

Thanks,
Daryl

strangeways

http://www.diystompboxes.com/smfforum/index.php?topic=55635.0

The answer is clear!!!!!

This worked.  Sorry to think out loud. :icon_rolleyes:

Thanks to anyone that looked and gave some thought.

Daryl