What is most transparent loop buffer design

[greiswig]

The Series/ Parallel loop that Bluesfendermanblues designed uses the best features of the O'Connor loop and the Dumbleator.

EDIT:
This is the final schematic. (I should discard earlier versions.....)

I'd love to hear more about the "best features from each" comment.

[bluesfendermanblues]

The Series/ Parallel loop that Bluesfendermanblues designed uses the best features of the O'Connor loop and the Dumbleator.

EDIT:
This is the final schematic. (I should discard earlier versions.....)

I'd love to hear more about the "best features from each" comment.

The idea with the desing was to get:
1) In serial mode - as close to the 'original' schematic as possible
2) In Parallel mode - as transparent as possible AND with same level in the circuit as when bypassed.

https://tubeamparchive.com/viewtopic.ph ... 77&start=0

[greiswig]

The idea with the desing was to get:
1) In serial mode - as close to the 'original' schematic as possible
2) In Parallel mode - as transparent as possible AND with same level in the circuit as when bypassed.

Thanks, BFMB!

[LPSGME]

I altered my d'lator last night to this configuration. Works great! Thanks.

But I kept hearing less bass through the circuit than I heard when it was bypassed (via the bypass switch).

It may be because I didn't have an extra [specified] .47 cap available for the second stage input [the first stage .47 cap already being part of the d'lator circuit] - and the best I could do was .2

However I didn't hear any difference when inserting a .1 or .2, so I'm not sure how critical having .47 is. The only way I was able to get the same bass response [as when bypassed] was to substantially increase the .05 input cap.

I tried using .1 [instead of .05] but that still didn't do it. So I jumped up to a 1uf and then my bass [through the circuit] sounded identical to the bass when the circuit was bypassed.

Note: When testing, I disconnected the jack connection between the parallel path for the 'effect' - so as to disable any interaction from the signal flowing through the parallel 'effect' path [with no effect plugged in] - so it was just getting the single unprocessed signal path through the 220k.

RE: Cables between amp and d'lator:
I also noticed that the bypassed sound was not the same [not as good] as when I unplugged the cable connecting the amp to the d'lator - which is obviously the result of the quality of the connecting cables. I was only using inexpensive 6' cables.

Does anyone have an opinion as to what would be the best short [2'] patch cable to get the sound from the amp to the d'lator unchanged?

After looking at various high end cables at http://lavacable.com I couldn't decide which one would be better. I was leaning toward the evidence but at near $100 for 2 short cables, I opted for the klotz.

http://www.lavacable.com/klotz.html or
http://www.lavacable.com/mogami.html or
http://www.lavacable.com/evidence.html or
http://www.lavacable.com/zaolla.html

[Structo]

I like buying cable and plugs from Redco.

For the cables to and from the pedal board I used the following.
The Mogami 2524 is an industry standard and the Neutrik plugs are very high quality.
What I did was make two cables with right angle plugs on them.
When I ordered the plugs I also ordered the color coded end caps for them. Red and Blue.
Then I took a red and blue Sharpie and marked the two Send and Return jacks on the D'lator.
That way when I plug into the back of the D'lator I know which jack to plug into.

Mogami 2524
http://www.redco.com/shopexd.asp?id=507

Nuetrik plugs
http://www.redco.com/shopexd.asp?id=969

Color coded ends
http://www.redco.com/shopexd.asp?id=1026

For the cables from the amp and to the D'lator I used some high quality 6" patch cables.
Since the loop sits on top of my amp, the 6" cables work very well.
But you can also build them.