RE: ARC SP10 linestage mods

Posted by casouza (A) on June 9, 2012 at 13:46:34

In Reply to: ARC SP10 linestage mods posted by Frank Waller on June 8, 2012 at 11:54:46:

Frank, I do not own and SP-10 however I have heard it hundreds of times at a friend's home.
I have a couple of suggestions:
-the simplest mute circuit is the one that does the least harm to sound quality: use the ARC mute switch to short the output to ground (no photo-transistors, use a pice of wire and the switch contacts), all connected after the output coupling cap. Operate it manually and wait 3 minutes after power on to un-mute. Always mute when switching inputs, cables or turning off the preamp.
-Instead of spending your money on three brands of so-so 6922s, spring for a full set of Amperex 7308 tubes. These are are extremely quiet, balanced triode tubes designed to. military specifications, e.g. they stand a much higher plate voltage than 6922 and are specified to last 10,000 hours, about four times as much as regular 6922s on an SP-10. To boot, Amperex have the best bass quality / punch in the 6922 / 7308 tube family.
Good luck
C.

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Follow Ups Full Thread

Topic - ARC SP10 linestage mods - Frank Waller 11:54:46 06/08/12 (5)

RE: ARC SP10 linestage mods - smctigue@amscan.com 05:28:47 10/14/12 (0)

RE: ARC SP10 linestage mods - casouza 14:27:30 06/09/12 (2)

RE: ARC SP10 linestage mods - Frank Waller 06:01:45 06/11/12 (1)

RE: ARC SP10 linestage mods - casouza 18:38:22 06/11/12 (0)

RE: ARC SP10 linestage mods - casouza 13:46:34 06/09/12 (0)

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RE: ARC SP10 linestage mods - casouza 13:46:34 06/09/12 (0)

RE: ARC SP10 linestage mods

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