dynacomp in black box

[fpaul]

I have a dynacomp in a big black box.  I found a gut shot here:

http://www.geocities.com/stompbox2001/dynacomp.htm

I misplaced mine for awhile and almost had another one built from the geofex board when I found it again.  I opened it up to see how different it was and was a little shocked to find it has two 4558s, a cd4007ube, five transistors, and thirteen electrolytics.  It seems to be a completely different circuit.  It does have the 3080 though.  It also has two outputs.  I'm not sure but I think one is dry signal.  (I have a Distortion plus in the same type box and sometimes I would be wondering why I wasn't getting distortion.  Wrong output)

I am wondering what all those extra parts are for?  Anyone have an opinion on which circuit sounds better?  The guy in the link above seems to really like the black box.  I'll eventually finish my build and compare but was wondering what others think about it.  Also curious about the eight pin connector, and it would be interesting to know the history.

[oskar]

8 pin connector. In production you often see connectors that are for testing of the pcb after components have been mounted and/or after final assembly. Sometimes these are on a separate part that are cut off after it has been proven to operate properly. This could also be an expansion port so you could have it mounted in a case with other effects...
Maybe they had plans for it that never took off?

I am wondering what all those extra parts are for?

4007 ic and a couple of transistors are probably there for switching/routing of the signal. Momentary footswitch/ flip-flop...

[Mark Hammer]

I may be mistaken, but I think the additional jack in the 2000 series was for remote actuation of  an onboard electronic switching system.  Note that the CD4007 is widely used in DOD pedals for its electronic switching.  Given how standardized the basic Dynacomp circuit has remained over the intervening years, and how many pedals have continued to copy it (sometimes with a different OTA instead of the 3080), it would not surprise me if the pedal shown was simply a Dynacomp adapted to e-switching (this may include buffers not present in the original).

As for the 8-pin connector, I suspect it is used for connecting a daughter board where pots are mounted.  The daughter board has a male or female header, and the main board has the complement.  I have the same arrangement on a Korg pedal from the same era.

[oskar]

As for the 8-pin connector, I suspect it is used for connecting a daughter board where pots are mounted.  The daughter board has a male or female header, and the main board has the complement.  I have the same arrangement on a Korg pedal from the same era.

That makes more sense.