3 Sylvania 6HB6 6HA6 Vacuum Tubes Valves NOS NIB Lot Of Three 2 LP Box Set Mercury

3 Sylvania 6HB6 6HA6 Vacuum Tubes Valves NOS NIB Lot Of Three 2 LP Box Set MercuryThese three new old stock, new in box Sylvania 6HB6 6HA6 tubes tested to spec on our Paul Hart calibrated TV7 U. 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" AND OR CALL OR TEXT US AT 202 372 6931 IF YOU DO NOT SEE WHAT YOU NEED OR HAVE ANY QUESTIONS. 1. MOST FORMS OF SHIPPING EXCEPT MEDIA MAIL ARE AUTOMATICALLY INSURED UP TO $100. ETSY PURCHASE PROTECTION COVERS

They have narrow gray plates and O getters

I have played them in my Radio Craftsmen RC-2 monoblocks (with adapters -- not included) and they sound outstanding

It has dual O getters

This hardback book is in very good condition

This matched trio of RCA 5Z4 rectifier tubes were tested on our Paul Hart-calibrated TV7/U for shorts

Transconductance measured 38/38 for Tube One (CBS-labeled) and 38/42 for Tube Two where minimum (65%) is 32/32

new in box RCA Number 37 tube tested to spec on our Paul Hart-calibrated TV7/U

its flaws can be excused and perhaps even embraced

copious flashing and a large

Tube Four (diodes): 55/62

I have no means to test this device

new in box matched pair of milspec Tung-Sol JAN-CTL-6098 / 6AR6WA output tubes was tested on Paul Hart-calibrated TV7/U for shorts