WOO!!!HOO!! Just got my OTS FM50!!! This thing is friggin' awesome!! I am playing through a 2x12 cab with late sixties EV SRO's I have the same setup in another cab for my 2550.

 Now! Hook 'em up in stereo and VAVOOM!!

I will post some sound clips or a YouTube vid with this setup. I can't wait to get out and gig with this.

Please show some interest guys, I mean he's probably the only folk in here who owns that amp, an amp that is supposed to be a clone of one of the best amp in history, and nobody give a damn' shit! It's not only that this post is not getting replies but it's not even read 

I have my amp modded to #102 specs for 1,5 year. It's useless without a dumblelator IMO. With dumblelator it's my favourite circuit.

C'mon Nik, the original design with the 68pF on the master is over the top bright without a dumblelator.
Removing or lowering the master bright cap is more S&M like I agree.

Brian - Clator or not?

So if this amp is too bright, why not just get the regular OTS where all the brightness has been tamed by the Scott Lerner mods?

Regarding C-lator (Dumblelator) or not.

Remember the FM amp is an clone of Robben Fords amp and Robben Ford always use a dumblelator loop to interface his TC2290 with his amp.
The external loop does two things
He uses fairly long connector cables, that 1) dampends the high end. This is why the FM amp uses a 68pf bright cap across the master volume.
Furthermore, the loop can 2) add some compression if you run it like Robben Ford with amp master volume at 11 o'clock and send and return controls on the loop also on 11 0'clock..

Regarding 1) dampening the high end
I have build the (parallel) loop into my #102 clone amp, so I don't use long cables in/out of the amp, and in order to get the same amount of high end dampening I use a 470pf cap across the ratio pot in and ground buss bar................this is infact the same mod forumite 'Pickmaster' presented last week. Only his mod is more flexible, using a 12 step switch with different cap values for different situations.
The cap on the ratio pot only affects the OD channel and I dont feel the need for a bright cap on my master volume.

Regaring 2) compression
I made some experiments this weekend with my build in loop.

I have added a switch allowing selection between series mode, like the c-lator or dumblelator, or parallel mode. I use the latter which allows you to use moderate quality effects, in my case an old Boss SE70.

I wanted to test parallel versus serial in higher volume situations, how much impact does the serial mode has on the sound - how much compression. I used a cable in the loop ot take effects out of the equation.
Using the loop in seral mode, does indeed allow you the get more compression/light distortion from the loop, but it tends to blur the clean sound, so I concluded that I found that I really don't need that extra compression effect and I'm quite happy with my build in loop in parallel mode.
 
Hope you can use this info
for deciding on wheater or not you want to use a loop
wheather or not you need a bright cap
and wheater or not you will run it in serial or parallel mode

Wow, this is getting way over my head. I think the amp sounds great as it is.