Cap Can change

[72fetter]

wondering if i can lose all these cap cans and just get a similar setup to a jcm800 (two 50+50 cans)
I am running a much higher voltage output and power trannie than specified anyways

[mlp-mx6]

Not enough information to answer your question. Need MORE details, please.

[72fetter]

sure.
I have the standard tw express 30 uf+47uf+47uf setup as well as the 3 22uf voltage capacitors.
I am wondering if i can clean up my setup by reducing my layout to a simple marshall esque 50+50 cap can setup.

my diagrams for my trannis is attached

[M Fowler]

72fetter,

Did you mean get rid of those axil caps and use two 50/50uf can cap?

[M Fowler]

Wow 385v secondary that is very high voltage.

[72fetter]

the trannies where originally intended for a plexi style amp with the option of running kt88's

-what should i do?

p.s. excuse my ignorance and lack of technical vernacular....still learning

[soma_hero]

Can caps are used pretty frequently here. Search for some of Dana Hall's express/liverpool combos for very clear and detailed pics using JJ 20/20/20/40 and a 50/50.

As far as your secondary voltage goes, that's too high to preserve authentic express mojo. May still sound cool but won't be a trainwreck. You could add a few zener's to the center tap to drop voltage. You could install a VVR and limit the max voltage to around what a trainwreck would run at.

The normal secondary for a trainwreck is 100V lower than that transformer so you need to lose some serious voltage.

[RJ Guitars]

Ah Ha just posted this otherwise... I did this on a Rocket build.

Can #1 = 32uf + 32uF in parallel to get 66uF (close enough to 80uf??)

Can # 2 = 40uF + 20uf +20uF +20Uf

Clean and neat...

rj

[72fetter]

not too concerned with whats been done....more looking to the future lol.....so with those voltages..is there anything i can be doing to take advantage of those voltages?

[72fetter]

see now thats what i am talking about!! how do i incorporate that into my setup?
granted i play heavier music and the express design has been working great so far...but can always use improvements

[soma_hero]

Yeah man, run a fat octal output section like KT66/KT88 or something. I made a rocket with KT66 with about 370V on the plates, it's loud and clean.

[72fetter]

what would i have to change to run 88's?

[RJ Guitars]

what would i have to change to run 88's?

Bigger iron, but at some point it won't fit in the standard Wreck configuration. The answer usually ends up looking something like the Komet layout.

rj

[M Fowler]

The 66 Rocker see thread.

Or a Dr. Z Route 66 uses KT66 with 375v secondary PT.

[72fetter]

anybody see an issue with going over on specs...like a 100+100 cap ad the multi cap everybody has used? and where can i find a good layout...still havent gotten the hang of schematics