suitable/optimum resistor types for grid resistor.

Jim R. · 2020

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Offline Jim R.

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Any recommendations, especially if there is some reasoning behind it.

Thanks,

Jim

Jim Rebman -- recovering audiophile

Equitech balanced power; uRendu, USB processor -> Musette DAC -> 5670 tube buffer -> Finale Audio F138 FFX -> Cain and Cain Abbys near-field).

s.e.x. 2.1 under construction.  Want list: Stereomour II

All ICs homemade (speaker and power next)


Offline mcandmar

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Reply #1 on: June 14, 2014, 08:28:00 AM
If it helps i recently replaced some in my S.E.X. amp with these, http://ie.mouser.com/Search/ProductDetail.aspx?R=OD221JEvirtualkey58810000virtualkey588-OD221JE, i think they are the ones supplied in the kit as they physically looked identical.

M.McCandless


Offline Jim R.

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Reply #2 on: June 14, 2014, 12:28:01 PM
Hi Mark,

Thanks for the link, but what I'm really looking for is a discussion of what types of resistors are most suited for use as grid resistors, and what properties make them so.

Kind of like it is generally preferred to use carbon comp resistors for grid stoppers, but other types will work, and some are to be avoided, and the same for cathode resistors.

Sorry for not making that clear,

Jim

Jim Rebman -- recovering audiophile

Equitech balanced power; uRendu, USB processor -> Musette DAC -> 5670 tube buffer -> Finale Audio F138 FFX -> Cain and Cain Abbys near-field).

s.e.x. 2.1 under construction.  Want list: Stereomour II

All ICs homemade (speaker and power next)


Offline 2wo

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Reply #3 on: June 14, 2014, 05:47:51 PM
Grid resistors pass almost no current, maybe look for the one that was least antenna like ;)...John

John S.


Offline Grainger49

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Reply #4 on: June 15, 2014, 01:57:52 AM
I would think that an inductive resistor would help;the higher impedance at high frequencies being a good attribute.



Offline Paul Birkeland

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Reply #5 on: June 15, 2014, 07:40:52 AM
I would think that an inductive resistor would help;the higher impedance at high frequencies being a good attribute.

Then you may unintentionally create a resonance with the resistor's inductance. 

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline Jim R.

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Reply #6 on: June 16, 2014, 07:22:40 AM
So, i did some research on this subject abd bottom line, as if it's any surprise, just go with what bottlehead supplies. ;-)

-- Jim

Jim Rebman -- recovering audiophile

Equitech balanced power; uRendu, USB processor -> Musette DAC -> 5670 tube buffer -> Finale Audio F138 FFX -> Cain and Cain Abbys near-field).

s.e.x. 2.1 under construction.  Want list: Stereomour II

All ICs homemade (speaker and power next)