SKU:90849107855
3 RCA Number / Type 78 #78 Vacuum Tubes Valves Shoulder ST-Shape Lot Of Three
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Ships within 48 hours · Estimated delivery Aug 14 - Aug 19
Description
3 RCA Number / Type 78 #78 Vacuum Tubes Valves Shoulder ST-Shape Lot Of ThreeThese three RCA plate number 78 tubes were tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas and they measured as follows: 32, 44 and 52 where minimum is (65%) is 36 and 100% is 55 and 100% is 55. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE CALL OR TEXT US AT 202 372 6931 IF YOU DO NOT SEE WHAT YOU NEED OR HAVE ANY QUESTIONS. 1. MOST OF THE TUBES WE
This RCA 1B5 / 25S tube is new old stock and new in box and tested to spec on our Paul Hart-calibrated TV7/U
new in box Dutch Amperex RCA 6360 tube tested to spec on our Paul Hart-calibrated TV7/U
dual triode power tube was tested on our Paul Hart-calibrated TV7/U for shorts
Tube One drew 33 milliamps' plate current while Tube Two drew 34
Tube One measured 66/54 and Tube Two measured 70/54 where minimum (65%) is 50/50
perhaps a 7
I just cleaned this three record LP set on my VPI 16
(New US-made 6BG6s typically test with plate current readings from the mid 20s to mid 50s with transconductance within a standard deviation of 2300 micromhos or so
Tube Three measured 58
Baldwin-BRANDED and SELECTED 12AU7A / ECC82 dual triode was tested on our Paul Hart-calibrated TV7/U for shorts
new in box US-made 35A5 tubes tested to spec on our Paul Hart-calibrated TV7/U
This hard cover book is in good condition
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