MXR Dynacomp cap values (Attack of the Mod-Kiddies!)

Started by O, June 03, 2006, 03:07:41 AM

Previous topic - Next topic

O

Ya' gotta love "mod-kiddies". I got a DynaComp pedal in for repair that had been butchered in a lame attempt to mod it to "Ross" specs. Anywho, after 5 swapped out C1815 (!) transistors, a mis-oriented LED, numerous broken traces and a halfway desoldered CA3080, it is now working again.

I haven't had a chance to try it out on a decent amp (baby & wife are asleep), but in the little bench amp I've got, the harder I strum, the more distorted it sounds. I socketed the Opamp, and tried different ones but it still sounds the same. Since most of the resistors have some paint missing, I'm wondering if one of them drifted from the heat and is mis-biasing one of the transistors. Anyone have any ideas? (I'm going to probably replace them all just to be sure.)

Looking at the board closely, it seems that any and all diodes have been swapped out (at least they got the orientation right) and the electros have been replaced with tantalums. Also, all the other caps have been swapped with 250v blue caps.

Since it's a double sided board, it's going to take me a while to figure out what values should go where (going from the TonePad schem). Does anyone have a quick pic of the board, or have a values list for the following caps? If it helps, this is the older DynaComp with the 1/8 DC jack instead of the Boss-style barrel jack.

I need the values for the following pots as labeled on the board:

C1=
C2=
C3=
C5=
C6=
C7=
C8=
C9=
C10=

If anyone can help me out, I would appreciate it. :)

O


Papa_lazerous

lol try looking at a schematic they're readily available

Dirk_Hendrik

 :)
Since I'm in the gang of those mod kiddies... Succesfully though, I do take offence of your post (  ;)  ) and  cannot do anything else but wonder how it is possible that you are able to determine which semiconductors are to be replaced but not what the values of the capacitors are for a schematic that can be found online?
More stuff, less fear, less  hassle and less censoring? How 'bout it??. To discuss what YOU want to discuss instead of what others decide for you. It's possible...

But not at diystompboxes.com...... regrettably

george

why would anyone desolder the CA3080?  It's not part of any Ross mods I've seen ....