Using the 6H30 "super tube" narrows the choice

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Posted by E-Stat (A) on February 26, 2017 at 10:15:00

In Reply to: Audio Research LS-27 preamp tube replacement posted by audioman on February 25, 2017 at 15:38:53:

Which is fine by me. AFAIK, there are three choices:

1. Current production Sovtek
2. Current production Sovtek with gold pins
3. NOS 6H30-DR

While the third choice is the best, they are quite pricey when you can find the genuine article. I have an SP20 and purchased a replacement set of choice 2 for when the time comes.

I'm with 3+4 in that my experience parallels his that small signal tubes don't seem to "wear out" like power tubes. I know when the 6550Cs are dying in my VTL amps because they require higher bias settings and eventually start taking out the B+ fuse.

I used to have a Manley DAC with a simple 12AU7 tube output and just for grins, left the tubes in for years. Seemed to not make much difference with that model. At around 4000 hours (ARC recommendation), I might try swapping out the original 6H30s with the new set and see if I can hear any difference.

We'll see...

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Follow Ups Full Thread

Topic - Audio Research LS-27 preamp tube replacement - audioman 15:38:53 02/25/17 (12)

RE: Audio Research LS-27 preamp tube replacement - kentaja 12:39:37 02/27/17 (0)

this may help - airtime 07:02:54 02/27/17 (0)

Using the 6H30 "super tube" narrows the choice - E-Stat 10:15:00 02/26/17 (2)

RE: Using the 6H30 "super tube" narrows the choice - kentaja 12:43:42 02/27/17 (1)

Thanks for the tip! -nt - E-Stat 05:39:29 02/28/17 (0)

ahhh preamp tubes either work, or are noisy.. If your tubes work.. - 3+4=5 09:44:55 02/26/17 (0)

+1 airtimes suggestion and also... - Jonesy 08:51:08 02/26/17 (2)

RE: +1 airtimes suggestion and also... - SpotcheckBilly12345 09:36:39 02/26/17 (1)

Not in this case - E-Stat 10:23:43 02/26/17 (0)

RE: Audio Research LS-27 preamp tube replacement - airtime 18:11:29 02/25/17 (2)

RE: Audio Research LS-27 preamp tube replacement - audioman 10:57:00 02/26/17 (1)

RE: Audio Research LS-27 preamp tube replacement - airtime 12:01:53 02/26/17 (0)

Follow Ups

Using the 6H30 "super tube" narrows the choice - E-Stat 10:15:00 02/26/17 (2)

RE: Using the 6H30 "super tube" narrows the choice - kentaja 12:43:42 02/27/17 (1)

Thanks for the tip! -nt - E-Stat 05:39:29 02/28/17 (0)

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