EH Holy Grail Mods?

[pryde]

Hello,

I was curious if anyone has ever modded a Holy Grail reverb power supply or might know how to do it. I am thinking of re-boxing the big-clunky reverb into 125b (or smaller if possible) and would like to change the power to a 2.1 center-negative (boss adapter).

Right know it is powered with a center-positive 3.5mm supply. Is it possible to change this or is it more trouble than its worth? I like the reverb but not the large box and power supply. Also, any other worth while things to mod with this pedal?

[jubal81]

I did this very thing as my first-ever pedal project. Going to the new jack size is as straightforward as can be - just make sure you get the polarity right. I learned the hard way 

[pryde]

I did this very thing as my first-ever pedal project. Going to the new jack size is as straightforward as can be - just make sure you get the polarity right. I learned the hard way 

OK cool. So just install a standard 2.1mm jack as normal then? No other changes need to be made? Did you rebox your HG into a smaller enclosure as well?

Thanks

[jubal81]

Yeah, i reboxed it. The board is pot mounted with looong leads, so you'll need a new pot, too. I want to say it's 10K, but you can measure the one that's in there with a multimeter and see.

[Scruffie]

Yeah, i reboxed it. The board is pot mounted with looong leads, so you'll need a new pot, too. I want to say it's 10K, but you can measure the one that's in there with a multimeter and see.

A25k 

[pryde]

Cool. Thanks for all your help fellas