Quick Q: Resistor across a gain pot

RockStarNick · October 27th, 2009, 11:33 AM

If a gain pot is 1Meg, and there's a resistor across the lugs it, the resistor is in parallel, therefore DECREASING the available gain, correct?

Wayne Alexander · October 27th, 2009, 11:43 AM

Depends what value resistor, and which lugs. Post more specifics.

RockStarNick · October 27th, 2009, 03:52 PM

OK there's 2 1MEG gain pots, one for each channel.

One of them has no resistor, and the other one has a 220K ohm resistor on it, I believein paralell.

The one with the resistor should yeild lower gain, correct?

Ben Harmless · October 27th, 2009, 03:59 PM

Still depends.

What sort of amp are we talking about here? Is it something we could look at a schematic for (i.e. a classic Fender/Marshal/other design)?

RockStarNick · October 27th, 2009, 04:25 PM

It's actually a newer modular design amp, like the Randall MTS series. Definitely not a classic design, but a pretty standard gain pot, I'm guessing.

celeste · October 27th, 2009, 07:54 PM

Still lots of questions unanswered.

If we number the pot lugs 1, 2 ,3, with the wiper being 2 and the resister going from 1 to 3 then what you have is about 180500 ohm pot.

Now how that pot is connected to the rest of the circuit to control gain will decide which channel has more gain.

October 27th, 2009, 11:33 AM	#1 (permalink)
RockStarNick Tele-Meister Join Date: May 2009 Location: New Jersey Age: 30 Posts: 114	Quick Q: Resistor across a gain pot If a gain pot is 1Meg, and there's a resistor across the lugs it, the resistor is in parallel, therefore DECREASING the available gain, correct? __________________ GEAR: Fender US Tele Sunburst • Blackguard Blonde Tele • Fender US Strat • 2 Warmoth HB Tele Deluxes • Warmoth Thinline Gretsch-o-Caster

October 27th, 2009, 03:52 PM	#3 (permalink)
RockStarNick Tele-Meister Join Date: May 2009 Location: New Jersey Age: 30 Posts: 114	OK there's 2 1MEG gain pots, one for each channel. One of them has no resistor, and the other one has a 220K ohm resistor on it, I believein paralell. The one with the resistor should yeild lower gain, correct? __________________ GEAR: Fender US Tele Sunburst • Blackguard Blonde Tele • Fender US Strat • 2 Warmoth HB Tele Deluxes • Warmoth Thinline Gretsch-o-Caster

October 27th, 2009, 03:59 PM	#4 (permalink)
Ben Harmless Friend of Leo's Join Date: Mar 2003 Location: Albany, NY US of A Posts: 4,348 13 Photos	Still depends. What sort of amp are we talking about here? Is it something we could look at a schematic for (i.e. a classic Fender/Marshal/other design)? __________________ "I think I'll go for the life of sin, followed by the last-minute, presto-change-o, deathbed repentance." - B. Simpson "...Because we all expect the truth, we must be the best of fools." - Stiff Little Fingers

October 27th, 2009, 04:25 PM	#5 (permalink)
RockStarNick Tele-Meister Join Date: May 2009 Location: New Jersey Age: 30 Posts: 114	It's actually a newer modular design amp, like the Randall MTS series. Definitely not a classic design, but a pretty standard gain pot, I'm guessing. __________________ GEAR: Fender US Tele Sunburst • Blackguard Blonde Tele • Fender US Strat • 2 Warmoth HB Tele Deluxes • Warmoth Thinline Gretsch-o-Caster

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October 27th, 2009, 11:43 AM	#2 (permalink)
Wayne Alexander Tele-Afflicted Join Date: Mar 2003 Location: Los Angeles, CA, USA Posts: 1,351	Depends what value resistor, and which lugs. Post more specifics.

October 27th, 2009, 07:54 PM	#6 (permalink)
celeste Tele-Holic Join Date: Jun 2006 Location: Maryland Age: 48 Posts: 602 21 Photos	Still lots of questions unanswered. If we number the pot lugs 1, 2 ,3, with the wiper being 2 and the resister going from 1 to 3 then what you have is about 180500 ohm pot. Now how that pot is connected to the rest of the circuit to control gain will decide which channel has more gain.

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