Prelude to a DIY sticky

[disk11]

I was thinking it would be nice to gather up the mods shared on the forum in one place, so we don't have to dig through threads to find them. It could also serve as a resource to noobies like me who who need links/help on how to trace a circuit and how components affect the circuit in various places.

Here's what I've bookmarked so far:

http://www.grailtone.com/guitar-tone-articles/randall-modules-modifications.html
C3 and various mods

http://mtsforum.grailtone.com/viewtopic.php?p=85887#85887
SG's diagram for a 3-way tight switch

http://mtsforum.grailtone.com/viewtopic.php?p=85858#85858
Salvation's 1086 gain mod

http://mtsforum.grailtone.com/viewtopic.php?t=13150
Interesting Recto mod by Tbag

http://mtsforum.grailtone.com/viewtopic.php?p=61392#61392
Adding a 4th gain stage to certain modules

I know this isn't everything, for example I can't find the original post about using a different resistor in R7 to adjust the gain.

 

[Graham Pearson]

My component spreadsheet is an attempt to pull all of these mods together. I've been updating the spreadsheet whenever I read Grailtone posts with specific mods. Refer to the DIY thread "Component Spreadsheet" for details of how to download the current version.

So far, response to my pleas for help with this project have not been overwhelming. Best of luck with this endeavor.

 

[disk11]

If just the stuff I've found get sticked, then that's enough. More would be good, but I won't complain.

Guess we should add your latest sheets post too: http://mtsforum.grailtone.com/viewtopic.php?p=100628#100628

 

[SacredGroove]

The link regarding adding a 4th gain stage needs clarification. The first gain stage is in the amp/preamp, and is common across all modules in that amp/preamp. The modules have gain stages 2-4, plus cathode follower. Stages 2 and 3 are V1a/b, stage 4 is V2a, and the CF is V2b.

My guess as to why the tubes on the module are labeled as V1 and V2 is probably because the module is it's own entity.

:wink: