Brown sound is kinda light tan

[rnolan]

Hey Dante, great review  (love the disclaimer LoL)

[Systematic Chaos]

N!ce tube rolling, glad its working out for you now.

...
FRONT: Mullard
Back: JJ Gold Pin
Result; YUK. Low gain, lifeless, low volume, no tone...weird. This happened whenever the Mullard was in front, regardless of the rear tube.
......

This sounds like the Mullard has one side/Triode gone toast. I´d even bet money on that! Return that tube for a new one!

[rnolan]

Good call SC I agree, the Mullard should sound different but not Yuk.

[Dante]

Yeah, it was much quieter... it didn't sound good. I'll try returning it (I'm not using it ;)

[Dante]

BUMP: My Classic takes a lllloooooonnnngggg time to warm up, like maybe 30 seconds after it finishes the startup sequence. My Brown sound is sounding a bit fuzzy (not fizzy, fuzzy).... like I'm using a fuzz box turned down low to get a hairy overdrive. It sounds good, but I don't remember it sounding that way when I wrote the patches.

It only seems to be the Brown channel, I think the Distortion is working fine. I'm going to play around with it some more tonight.

[rnolan]

Hey Dante, has it always taken so long ? or is this new behavior ?

[Dante]

It did the slow warmup thing when I was rolling tubes, I thought it was just one tube causing it...but now I fear my Classic is in a slow rate of decline. I'm hoping it's something simple. And, I'm hoping it's related to the tone, which ain't right.

SO....
I broke out the MP-2 and put it in the rack with the G-System. It sounds marvelous. Not sure what I'm gonna do about this Classic for now...maybe try rolling some tubes again....or just tinker with it until I get it sounding right I guess  and try to rely on my trusty old OLD O.L.D. MP-2 that I fear is pretty fragile. I'll be careful with it, and it looks pretty cool with the blue screen in the rack. I'm only using the warm high gain and dynamic high gain voicings for now. Damn warm gain takes a few seconds to 'warm up' when switching from a clean patch...grrrr...but I digress

The Classic's Brown channel ain't working, I'm only using the Distortion and it sounds like a fuzz pedal, not an overdrive. Slowly getting worse...I think...or, I'm just noticing it more. Weird.

[MarshallJMP]

Maybe R151 is on it's way out?

[Dante]

I think I remember this...way up in the corner, hard to reach...very little. I got this..what do I put in there? What do I search for?

Thanks in advance

Dante

[MarshallJMP]

If I'm not mistaken it's a 180k resistor. Now you can always check it first with an ohm meter, you can do this in circuit in this case.

[Dante]

I have a multimeter now, what should that circuit read?

[MarshallJMP]

180k ohm ;D just measure over the resistor

[Dante]

I realize I'm bumping a VERY old thread....but I busted out the Classic the other day. The Effects Loop is not working now, not sure why.

[Davide]

Hi Dante, so sorry to read this about your Classic  :'( Did you check the OPAMP (U21) I replaced on mine?  (

[MarshallJMP]

Looking at the schematic, there is one ic that controls the FX loop and the SS, tube, clean and that is U19 (TC9164N). It's located behind the display.