Dyna comp dilema

[jubjub]

Hi there.
I have an original script dyna comp, and it's great.
That's all
No, hang on , i've got a question.
I bought it off a tech years ago who had to put it in a different box due to a freak roadie accident.
I want to either get the original box or get a decal and make my own.
Also does anyone know of any worth while mods to do to these?
Whats the Dyna Ross all about?

[Mark Hammer]

You won't be able to purchase a decal.  Manufacturers are understandably reluctant to either provide them or tolerate them since the possibilities for forgeries are considerable.

Since a transplanted unit is no longer truly equivalent to one in its original package (from a *product* perspective, though obviously not from a tone perspective), my feeling is it would be somewhat disingenuous to try and make it appear to be an original after several repackagings.

The "Dyna Ross" thing refers to the fact that the Ross compressor, like many Ross products, is only a few components different from the Dynacomp.  As it turns out, these small component differences tend to produce a more desirable tone to some players, and since Trey Anastasio uses one naturally it HAS to be good, right?  :roll:   Those people who have provided layouts here have allowed space for the user to make the appropriate changes to have the one or the other and make their own decision about which they like better.

One mod which is easily done is to add a "recovery" control.  This is sometimes referred to an an "Attack" control, but as previous discussions here have pointed out, it has only a very indirect influence on the attack time by altering the decay or settling time of the envelope follower so that the next note in line will appear to have a different attack time.

Look at schematics for the Boss CS-2 and the Pearl Compressor and you'll see that the 150k resistor tied to the collectors of the two transistors in the envelope follower is replaced with a 150k pot and 10k resistor in series.  At small resistance values (10k minimum) the recovery time is fastest and apparent attack shortest, which gives a little more definition to notes played fast.  At llongest decay times (full resistance) there will seem to be a little less distinction between the initial attack of several notes played quickly.

[jubjub]

That mod sounds great. Will get it doneand report back.
Has anyone used the Keeley compresor? What is that based on?

[Phorhas]

Has anyone used the Keeley compresor? What is that based on?

Well, on Keeley's web site the claim that it's a 100% Ross grey copmressor but with audiophile film caps and such - basically same circuit but with better and modern parts.