I have some extra 12au7 tubes I am looking to part with. I have 9 tubes, and I would like to sell all the tubes for $35 shipped. This is what you get:
Tungsram 12au7 - 1969 vintage. One tester where 100% is Ia = 10,5mA & S = 2,2mA/V, this tube tested: Ia=10,10.1, S=2.1,2.1
Tung Sol JTL-5814 - orignally tested new on a B&K 707 tube tester. Used about 10-15 hrs
Tungsol 12au7 D getter - untested.
RCA Blackplate D getter - Test 2300/2500 on military TV-7DU tester where minimum good is 1400 umho and new is 2200 umho.
CBS 12au7 blackplate - Tested @ 2210/2100 average new = 2200/2200
2x GE 12au7 grey plate - untested
Sylvania JHS 5814 blackplate - untested
RCA 5814 2 mica blackplate 1969 vintage - untested
All tubes work fine, the RCA blackplate has some hum/background noise. The other tubes appear to be quiet. This is a great inexpensive way to try tuberolling. I have 100% ebay and audiogon feedback under 'vrao81'.
