Overtone 100w, up and running, reporting voltages...

[massygt6]

Hi guys,
please take a look at the voltages I've in my clone...

v1

pin1 199v
pin3 1,9v
pin6 206v
pin8 1,75v

V2

pin1 215v
pin3 1,74v
pin6 216v
pin8 1,75v

v3 (PI)

pin1 316v
pin3 60v
pin6 312
pin7 38v

POWER TUBES

B+ 463volts
biased at 35 mA

they seems ok, except for the PI, aren't they a bit on the high side?
I found the clean channel gorgeous with my strat and es335, but the OD channel is not what I've expected, not entirely almost...
Many of you posted great clips, super smooth and refined sounds, at a first listen I'm still a bit far from that kind of sound.
I'd like to get a smoother sound out of the od channel, less middy...mine is a NON HRM version...so wich direction I should take first?

1) snubbers
2) HRM mod (in this case I see that every hrm amp has no subbers)
2) lower the preamp voltages?

Second question, is it worth to try some EL34 in there?
thanks
Max

[dogears]

Max,

You could try increasing the dropping resistor to the PI by 1K.

Also, your V1B cathode voltage seems low relative to the plate. Try swapping tubes.

Try these two changes first. This will restore the build to a Dumble baseline.

1) Raise the 150K feeding the OD trimmer to a 220K (as in almost ALL Dumbles.)
2) Raise the bypass cap on V2B to a 4.7uf from 2.2uf

Good luck!

[tsl602000]

Max,
I'm a strat player too and the biggest improvement I got was when I took a 330K and .01 cap from OD2 plate to ground and put a 10pF cap over the master volume.
I read this somewhere and think this mod came from Dogears. All the credits to him..

[massygt6]

Thanks!!!
Your advise is gold for me, since you got one of the most beautiful tone around!
I'll try these mods and report back...
thanks again...
Max

[massygt6]

Max,
I'm a strat player too and the biggest improvement I got was when I took a 330K and .01 cap from OD2 plate to ground and put a 10pF cap over the master volume.
I read this somewhere and think this mod came from Dogears. All the credits to him..

So thank you too, and double thanks to dogears

the 330k and .01 cap, you mean in series from the plate to ground? like this...

od2 plate-----330k-----(.01)------ground

on the master volume, now I've got a 15pf...a 10pf will do difference? is such a small change!

[dogears]

Even a small change in bright cap is very noticeable!

I use a .001uf to ground. Not .01uf

Thanks to Gil....

Max,
I'm a strat player too and the biggest improvement I got was when I took a 330K and .01 cap from OD2 plate to ground and put a 10pF cap over the master volume.
I read this somewhere and think this mod came from Dogears. All the credits to him..

So thank you too, and double thanks to dogears

the 330k and .01 cap, you mean in series from the plate to ground? like this...

od2 plate-----330k-----(.01)------ground

on the master volume, now I've got a 15pf...a 10pf will do difference? is such a small change!

[dobbhill]

I would put the .001 first to keep the voltage off the 330k, but that's just me. It should sound the same, yes?
D

[odourboy]

Is this different from the post-OD treble bleed mod Gil uses (which I believe is a 250K trimmer to a .001 to ground before the 'ratio' pot)?

[tsl602000]

I use a .001uf to ground. Not .01uf

ouch.. that's what I meant

[Structo]

I'm a strat player too and the biggest improvement I got was when I took a 330K and .001 cap from OD2 plate to ground and put a 10pF cap over the master volume.

So how is that implemented?
The .001uf and resistor?

[massygt6]

Even a small change in bright cap is very noticeable!

I use a .001uf to ground. Not .01uf

Thanks to Gil....

Max,
I'm a strat player too and the biggest improvement I got was when I took a 330K and .01 cap from OD2 plate to ground and put a 10pF cap over the master volume.
I read this somewhere and think this mod came from Dogears. All the credits to him..

So thank you too, and double thanks to dogears

the 330k and .01 cap, you mean in series from the plate to ground? like this...

od2 plate-----330k-----(.01)------ground

on the master volume, now I've got a 15pf...a 10pf will do difference? is such a small change!

ok, got it
by the way, raised the feed trimmer resistor to 220k, v2b cathode bypass is now 4,7uF...wow! what a difference!
The buzz is almost gone, and the sound is a lot smoother!