Matched Pair RCA 5879 Vacuum Tubes NOS-Testing Gray Coated Glass 5 dB / -86

5 dB / -86

I am playing them in my Sound Craftsmen RC-2 monoblocks with at 6

new in box US-made 6KY8A tubes tested to spec on our Paul Hart-calibrated TV7/U

On the TV7/U

This matched pair of Raytheon black plate

Matched Pair RCA 5879 Vacuum Tubes NOS-Testing Gray Coated Glass 5 dB / -86This new old stock TESTING, perfectly matched pair of RCA 5879 tubes was tested on our Paul Hart calibrated TV7. for shorts, gas and transconductance. There were no shorts or gas. Both tubes measured 42 where minimum (65%) is 25 and 100% is 35. These tubes have top, O getters; steel support rods and outstanding flashing. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE "LOWTECHTWOO"