What's the purpose of the 2.49k resistors?

Jim R. · 4707

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Offline Jim R.

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on: May 13, 2010, 12:16:24 PM
I think I know, but I'd like to hear the experts explain.  Also, how critical is the value as long as they are matched?  I just found a pair of 2k7 caddocks I'd like to use.

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 Paul Birkeland

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Reply #1 on: May 13, 2010, 12:27:32 PM
They discharge the coupling caps as the amp starts up. I think we found anything from 2k-4.7k was ok. Any bigger and the discharge is too slow, any smaller and the resistor loads the output more than we'd like.

Paul "PB" Birkeland

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Offline Jim R.

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Reply #2 on: May 13, 2010, 03:26:30 PM
Thanks, Paul.  AS I suspected, so thanks for confirming.

Paint and a 2% matched pair of BG 150uF 350v NHs arrived today, and there will be painting weather next week, so it shouldn't be too long before my kit will be going together.

-- 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)

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