So I bought a Pro-ject Pre Box RS... (Valve suggestions?)

From memory it's just a standard female mini XLR connector, I think I got mine from Ebay. I put a multimeter on the original power supply (it's DC, so polarity was easy to check) and soldered to two pins of the three with the same polarity.
I have a HDPlex 200W linear power supply, which services my music server (fanless), FEMTO USB card, separate power for SSD's in the server, and of course the Pre Box RS.

Thanks tomcy6,
I'll check out the codes and see if I can translate them :-)

Thanks delkal,
I am learning from you guys.

tomcy6,
Phillips SQ
I can make out (looks almost etched in a faded silver/grey)
7LG (then under it)
What appears to be a right angled triangle, with the hypotenuse coming from down on the left, to it's apex on the longest of the other two sides which is vertical on the right, then 1F4. Both have exactly the same markings.

AMPEREX P.Q (PQ with two stars, one between the letters up top and in the bottom of the shield)
Amperex
6922
Made in USA (funny as I purchased both sets in Australia, seem I brought them home) in silver numerals "332" and also separately below in grey
7L8 (next line under it had me puzzled)
at first the symbol under it looked like a wagon wheel, but then I realised it was a circle with the pins for the valve, and then 3F to it's right.
Elsewhere  it also has in larger white print, what I thought was a faded 405,but is in fact using both as a reference clearly 105 with a strike through the middle of the 1's, kind of like the French do with sevens. Maybe it is a 7?
With the shaft being vertical, or parallel with the 05, not at all angled to the right like a seven though.

Hope that's not too cryptic?
Thank you tomcy6




 

I am still burning it in, as it came from factory.. It turned really muddy, but I am leaving a signal run through it, even if not at usual listening levels.
Currently it is either sounding better than it was out of the box or my audible memory is shot (left myself wide open, even chambered the bullet). I'll tube roll after burn in is completed.. a few hundred hours aught to do it? Should be about a fortnight, or so.

Thank you for so much information, much appreciated.

tomcy6
I'm flying back to visit family in Australia, and while I'm gone I was seriously considering cryo treating my speaker cables and interconnects.
Should I send the valves in with it? Had any experience with doing that?