analog Delay layout

[scaesic]

has nayone got any pcb layouts for an analouge delay? a veroboard layout would be good too.

[d95err]

There is one at www.generalguitargadgets.com.

[Mark Hammer]

There are two delay layouts at GGG, one being the completely analog AD3208, and the other being the somewhat analog PT-80.  For a number of different reasons, the two appear to be equally well-appreciated by builders.  Many have commented that, as a result of the filtering used, the PT-80 has the warmth commonly associated with analog.

[Joe Kramer]

Hi!

I have a PCB for the AD-3208, nicely made board.  Never built it though, because I realized too late the output signal is INVERTED with respected to input.  Just the thought  of that kind of bugs me.  Sorry for the non-constructive remark. . . .

Joe

[Jaicen_solo]

Why don't you just build the amz mosfet booster, taking the output from the gate leg. That will give you an inverted, unity gain buffered output.
Or make up an op-amp inverter. It's not the end of the world!!

[ExpAnonColin]

There are two delay layouts at GGG, one being the completely analog AD3208, and the other being the somewhat analog PT-80.  For a number of different reasons, the two appear to be equally well-appreciated by builders.  Many have commented that, as a result of the filtering used, the PT-80 has the warmth commonly associated with analog.

The PT-2399 also has a lo fi character, which when companded in the same way as an analog delay, is very crunchy and convincing.

-Colin

[Joe Kramer]

Why don't you just build the amz mosfet booster, taking the output from the gate leg. That will give you an inverted, unity gain buffered output.
Or make up an op-amp inverter. It's not the end of the world!!

Thanks for the encouragement.  I did work out a way to add an inverting transistor input buffer right on the PCB, using the pads intended for the Millenium Bypass circuit.  Just a few jumpers or so.  But I had been hoping for the integrity of a nice tight PCB, and here it all started getting rather untidy, and I thought I might as well just perfboard something from scratch at that point.  Guess I'm just particular that way. . . .   Not that an inverting output wouldn't be just fine in 999 out of 1000 cases.   But with all due respect to Scott Swartz and GGG, I'd have liked to see that "finishing touch" put on an otherwise very well-designed circuit and PCB.

Joe