OD fuzziness

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herby660
Posts: 26
Joined: Mon Jul 10, 2006 7:36 pm

Slope resister

Post by herby660 »

massygt6 wrote:its kinda absurd...
but my overtone is A LOT SMOOTHER WITHOUT SNUBBERS on V2.
Try this:

1)bring the slope resistor to 75k
2)Dime the value of the bass cap
3)Remove snubbers or put a very little one, kinda 100pF.
4)the LEVEL pot should be 100k
5)install the treble bleed mod

I0ve incredible tones now, smooth and fat, and the clean is stellar without honkyness and overpowering bass.
Can you tell me where the slope resister is and what is emant by the slope resister.

Many thanks

Richard
mlp-mx6
Posts: 1111
Joined: Sat Feb 04, 2006 4:24 pm
Location: NW Atlanta

Re: OD fuzziness

Post by mlp-mx6 »

The slope resistor is the resistor between the treble cap and the (bass and mid caps) in the tone stack.
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WILLIAMEON
Posts: 14
Joined: Thu Apr 19, 2007 12:33 pm
Location: usa

add 2 47uf-450volt caps to the power supply.

Post by WILLIAMEON »

I added one 47uf 450v cap to each of the 100uf 450v caps in the power supply and it helped clean up mine. The master and the volume should be at least at 1/4 or 9 o'clock on the dial.

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Structo
Posts: 15446
Joined: Wed Oct 17, 2007 1:01 am
Location: Oregon

Re: Slope resister

Post by Structo »

herby660 wrote:
massygt6 wrote:its kinda absurd...
but my overtone is A LOT SMOOTHER WITHOUT SNUBBERS on V2.
Try this:

1)bring the slope resistor to 75k
2)Dime the value of the bass cap
3)Remove snubbers or put a very little one, kinda 100pF.
4)the LEVEL pot should be 100k
5)install the treble bleed mod

I0ve incredible tones now, smooth and fat, and the clean is stellar without honkyness and overpowering bass.
Can you tell me where the slope resister is and what is meant by the slope resister.

Many thanks

Richard
The slope resistor kind of determines how the tone stack will operate.
Lowering it will make the amp more mid-rangey.
When looking at the Ceriatone OTS layout, it is the 150K resistor at the far right of the main board.
Tom

Don't let that smoke out!
massygt6
Posts: 168
Joined: Thu Feb 16, 2006 12:49 pm

Re: Slope resister

Post by massygt6 »

Structo wrote: The slope resistor kind of determines how the tone stack will operate.
Lowering it will make the amp more mid-rangey.
When looking at the Ceriatone OTS layout, it is the 150K resistor at the far right of the main board.
Strange how I really feel the amp LESS midrangey than before...
The bass cap is now 0,047uF...
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Structo
Posts: 15446
Joined: Wed Oct 17, 2007 1:01 am
Location: Oregon

Re: OD fuzziness

Post by Structo »

Yes but you dropped your bass cap value at the same time as lowering the slope resistor value, so it probably balanced out nicely.
Tom

Don't let that smoke out!
massygt6
Posts: 168
Joined: Thu Feb 16, 2006 12:49 pm

Re: OD fuzziness

Post by massygt6 »

Structo wrote:Yes but you dropped your bass cap value at the same time as lowering the slope resistor value, so it probably balanced out nicely.
Yeah, that makes sense now...made a brief simulation on duncan tone stack calculator and dropping the slope, raise the bass a lot, giving the "illusion" to have less mids...
I'm going to try a 200k slope now :wink:

report back on the 200k slope...STELLAR CLEANS...really, impressive, blackaface tones out of the clean channels...I am in strat heaven...the OD is kinda cutting now, less mids, sharper...but not in a bad way...guess I'll try a 180k or put a switch with double slope selection...200k for cleans, 80k for od. :wink:
Steven_nl
Posts: 95
Joined: Mon Apr 14, 2008 7:48 am

Re: OD fuzziness

Post by Steven_nl »

you might try putting Sovtek (or Tung Sol) 5881's in
JD0x0
Posts: 556
Joined: Tue Oct 09, 2007 2:19 am

Re: OD fuzziness

Post by JD0x0 »

Steven_nl wrote:you might try putting Sovtek (or Tung Sol) 5881's in
i have tungsol 5881's in it
It's true i've lost my marbles and i cant remember where i put them
JD0x0
Posts: 556
Joined: Tue Oct 09, 2007 2:19 am

Re: OD fuzziness

Post by JD0x0 »

Steven_nl wrote:you might try putting Sovtek (or Tung Sol) 5881's in
i have tungsol 5881's in it
It's true i've lost my marbles and i cant remember where i put them
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