Trailing repeats or other mods for a Dan-Echo?

[aestoval]

I just got a used Dan-Echo today and have been wondering a while about the mods possible.  I'm very interested in trying to figure out how to to give it trailing repeats after the box is off. Could you just send the delay out directly to the out jack? I also saw some mods on adding modulation to the delay. What schematic was used for the modulation? I only mods I am aware of that are widely discussed are the input impedance mod and the oscillation jumper mod. I was also wondering if taking the time to replace some of the lame components with higher quality ones (metal film resistors, etc.) would help with eliminating the distortion caused by high volume inputs. If anyone has any cool ideas for this box let me know I'm ready to get my soldering iron out. Thanks

Atticus

[Taylor]

The basic idea of trailing repeats is that you only switch the connection from input jack to circuit input, rather than the usual true bypass which also switches the output. In this setup, the effect output is always connected to the output jack, so it can't be true bypass.

The Echo Base project on this site has a very elegant setup for tails, but it requires some circuitry. If you want to do this as simple as possible, just wire up a switch that, when engaged, connects the input jack to the circuit's input (the point on the board where the in jack currently connects), and when "bypassed" simply disconnects this connection. You can use a DPDT and use the other pole to switch an LED.

[Ben N]

The Dan-Echo (one of my favorite delays) has a crappy input buffer, which contributes to its tone-sucking bypass ways. Somewhere on the internets there is a mod to sub in a hi-impedance opamp buffer. Unfortunately, I seem to have lost the link... 

[oliphaunt]

I would love to change the buffer in mine, it is a good sounding delay, but the tone suck factor makes it unuseable.

[Ben N]

I would love to change the buffer in mine, it is a good sounding delay, but the tone suck factor makes it unuseable.

I found that I could minimize the problem by sticking it between a couple of well-buffered pedals, e.g. Boss.