Howdy Lads, ladies,

I've just spent a grand total of 2 minutes installing this and i've gotta say a world of difference is made.

I put in the two 390pf capacitors, as a local feedback in both of the sides of V2.

It's killed that ultra horrible treble my bluesmaster is getting, and now the treble trimmer is at 12 o'clock, my clean treble is at 2 o'clock, and the amp is singing.

This is really simple and i encourage everyone with a hrm blues to try it if they are unhappy with the fizz on the overdrive channel...

I used dielectric polystyrene caps from element 14:

http://au.element14.com/lcr-components/fscex-390pf-1-630v/capacitor-390pf-630v/dp/9520775?Ntt=952-0775


I should add here however that I am using 6V6's instead of the 6L6's supplied. IMHO the 6V6's provide a wider varitey of tones at in-my-loungeroom levels.
 



Next I'm going to try 100k plate resistors on all the 12ax7s, then maybe start playing with that 47k slope resistor.

Jimbo.

No fizz on my BM 50w od channel. I recently tweaked the treble trimmer to 12 oclock, and now it doesn't sound boxed up like it used to. As plastic suggested, you may have been fixing a wrong tube situation with a much more complicated fix than is necessary.

 +1 my BM is not ice picky either. When I got my amp I thought it was too dark in fact, but that all changed as the amp broke in, even with a d-lator.

hmm, well first of all its not a local feedback loop, i was quite tired when i posted that yesterday, its just a pair of 390pf caps across pins 1 - 3 and 6 - 8 like the ots standard.

as for the speaker, i'm using the wgs 12-65, its just in the fender performer combo which i'm using as a cab till i get a decent couple'a days off to build my 2x12 dumble style. The other speaker is the wgs veteran 30 apparently the two sound quite nice together...

the ice pickyness is only on really loudly plucked or picked notes, the pickups i'm using are probably to blame, they are a set of klein's, with scooped middles similar to a certain pop musician's specs, but i've never been entirely happy with them, also i don't know if i've got the right sized and or type of tone capacitor in the guitar itself, as lowering the tone makes it sound a little like a half cocked wah.

hmm...

another aspect is this amp has probably got around 20 hours on it with a pair of jj 6L6's and three jj 12ax7s

I threw a nos "Ei" yugoslavian valve in there that i've had since i can remember (at least 26 years) so its gotta be my old mans from a radio or whatnot, which made the cleans nicer.

I dunno, i'll post a clip or two tomorrow when i can be funked.

thanks for the feedback, even though, i now feel like i've messed with something i didn't need to.

Thanks for the input JD0x0,

I'll try just piggybacking the 390's on that side, that'll give 780pf close enough, these components are hard to get at my local here in aus, so ordering them in takes  few days.
 

I've been noticing a blue haze developing in the output valves too, I've read a lot and apparently it doesn't mean anything, it looks cool though...

Always liked the looks of the blue glow. From what ive seen 99% of 6L6's have or develop that blue glow. Ive read that it's from air leaking into the vacume tube, but I dont think thats the case since the tube wouldnt be working if the vacume gets compromised at all by any type of leak.

Nah, as long as you get the amp sounding the way you like it, that's all that matters.

I forgot to ask, are you running OD and PAB at the same time? You may want to try it and then adjust the internal trimmers to your liking. Without running PAB and OD at the same time, you are going thru both tone stacks, which can make your tone sound wonky.
Glad you are getting it the way you like it!

Gregg