SKU:60057986295
Matched Pair Sylvania 12B4 12B4A Vacuum Tubes Valves NOS-Testing
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- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 30 - Aug 4
Description
Matched Pair Sylvania 12B4 12B4A Vacuum Tubes Valves NOS-TestingThis new old stock testing, perfectly matched pair of Sylvania 12B4A tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 46 while Tube Two measured 46 where minimum (65%) is 32 and 100% is 49. Wish I could tell you how they sound, but I don't have any equipment that uses these. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO
It sounds very good with a nice bottom end and as a bonus
It measured 53/58 where minimum (65%) is 40/40 and 100% is 62/62
This album is in great shape and merits an 8
Tube One measured 65/69 while Tube Two measured 66/70 where minimum (65%) is 30/30 and 100% is 46/46
These for new old stock
This is an early-production 12AU7
new in box Sylvania 6S4A tubes tested to spec on our Paul Hart-calibrated TV7/U
43 and 44 where minimum is (65%) is 36 and 100% is 55
new in box GE 7C5 tube tested to spec on our Paul Hart-calibrated TV7/U
This Amperex Bugle Boy ECC189 / 7308 / 6DJ8 / 7DJ8 dual triode was tested on our Paul Hart-calibrated TV7/U for shorts
This beautiful gray and silver matched pair of type Sylvania type 59 tubes was tested our Paul Hart-calibrated TV7/U for shorts
This new in box JJ 6BQ5 was tested on our Maxi-Matcher with 325 volts on the plates and a bias of -14 volts for shorts
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