ARC Ref 3: Tung-Sol 6550 in power supply?

How much does ARC charge for their 6H30's?
Are they PI's or DR's?

John

To the best of my knowledge, ARC supplies a matched set of 5 Sovtek 6H30PI for approx $240. The same tubes can be sourced from the Tubestore for $21 each, with a $5 premium per tube for matching. EH golden variant is about $2 more than Sovtek. See:
http://thetubestore.com/6h30types.html
Guido

I thought I had read somewhere that the 6H30 tubes were rated for 10,000 hours? I understand that this is probably a pipe dream but 1800 hours is a long way off 10,000.

I've got over 600 hours on my LS-26 so maybe I need to plan on an earlier swap out than first anticipated???

BTW, I have been to the Tube Store and they are great guys.

RGD, the answer is: not necessarily. the LS 26 is not the Ref 3. . . it is quite possible that the Ref 3 may drive those tubes harder. Keep listening to your system. . . your ears will let you know when the sound were starting to decline. It is also possible that tube lifespan may be a function of the system downstream. . . Until 3 months ago I have been driving a set of old Maggies IIIAs, which are notorious bears. Someone with more experience on tubes than I have may comment on effect of system downstream on tube lifespan.

Guido,

Keep trying different 6550's (probably a voltage regulator). PS tubes have a huge influence on the sound (as you have discovered). You should go after some NOS Tungsols. I would be very surprised if they didn't outperform the SED's in a big way. The very best TS's are the solid blackplate (no holes in the plates) triple D getters. They are very pricey but you only need one. If evryone took oneobgyn's approach to this hobby, nobody would learn anything on this forum.

Bart