4 RCA 17JB6 17JB6A Vacuum Tubes Valves NOS NIB Lot Of Four Auf Siphnos

4 RCA 17JB6 17JB6A Vacuum Tubes Valves NOS NIB Lot Of Four Auf SiphnosThese four new old stock, new in box RCA 17JB6A tubes tested to spec on our Paul Hart calibrated TV7 U. BECAUSE OF THE BIZARRE, INTRUSIVE AND DRACONIAN GERMAN PACKAGING REGULATIONS AND THE SEVERE FINES AND PRIVACY INTRUSIONS ASSOCIATED WITH THEM WE NO LONGER SHIP TO GERMAN ADDRESSES. WE WILL HAPPILY SEND YOUR PACKAGE TO A NEIGHBORING COUNTRY OR MAKE SUITABLE ARRANGEMENTS. IN 2021 WE PURCHASED 150,000 VACUUM TUBES. IF IT'S NOT LISTED, WE PROBABLY HAVE

Transconductance measured 4100/3400 micromhos

Transconductance measured a perfectly-balanced 2700/2700 micromhos

This Majestic number / type 55 tube was tested on our Paul Hart-calibrated TV7/U for shorts gas and transconductance

Transconductance measured 41/49 for Tube One and 44/44 for Tube Two where minimum (65%) is 32/32 and 100% is 49/49

Support Rods: steel

This lot of three RCA 12SC7 tubes tested as follows on our Paul Hart-calibrated TV7/U:

new in box Tung-Sol 66BC8 tube tested to spec on our Paul Hart-calibrated TV7/U

It tests below the cusp

This is an original recording from 1939 and it sounds 15-20 years ahead of its time

There are also two that are used that test fine

These three US-made 12AV5 output tubes were tested on our Paul Hart-calibrated TV7/U for shorts

They are not 6SN7s