[Yun66]

Seems good news, what is the time life from this tube?

I actually don't know. They are very well made. The pair I have has been used in a stage buffer and preamp for about 5 years. They still sound wonderful. I guess their useful life depends on the circuit design.

[twitch54]

6sn7? 6922?, 6H30?

I may be in the market for a new preamp. You're thoughts would be helpful

Thanks
Emil

well.......since my ARC LS28 has 4 6H30Pi's, it's got my vote.

[FullRangeMan]

6sn7? 6922?, 6H30?

I may be in the market for a new preamp. You're thoughts would be helpful

Thanks
Emil

To avoid headache my suggestion are stay away from expensive tubes, ''special'' tubes versions and rare tubes a long with tubes that have few subs. Said that the small tube have more versions I know are 6922:
6N1P Versions:
6N1P 6N2P 6922 6H30 6DJ8 7DJ8 7308 PCC88  ECC88  E88CC  E288CC  6N1 6H23P-EB, Siemens 8223  GA7  CV5358 5670 

6N1P have the warmest tone,
6N2P more dinamic than 6N1P,
6922 have the best dynamics,
6DJ8 have the most air and micro-detail with a touch less bass.
7DJ8 again, a powerful tool for voicing your amplifier to your particular tastes.

[Double F]

deHavilland Ultraverve, preferably the 3 since it comes with the Kara Chaffee designed 32 step remote relay volume control.  It runs both halves of a 6sn7 so you only need one.  Much easier and cheaper to find than a matching pair.

[Escott1377]

Please try the 300B mesh from EML if you are up for the investment. 

[Yun66]

deHavilland Ultraverve, preferably the 3 since it comes with the Kara Chaffee designed 32 step remote relay volume control.  It runs both halves of a 6sn7 so you only need one.  Much easier and cheaper to find than a matching pair.

Just curious if channel saparation will be affected when both use the same tube. Modwright LS100 also uses half 6sn7, but one tube per channel.

[Double F]

Just curious if channel saparation will be affected when both use the same tube. Modwright LS100 also uses half 6sn7, but one tube per channel.

No affect.  Each 1/2 acts as it's own circuit, however, if the tube is microphonic or noisy both channels will perform poorly.  I test my own tubes for noise and match sections within 300-400 micromhos.

[Yun66]

Good to know! Thanks!