4 US-Made 7B7 Vacuum Tubes Lot Of Four

4 US-Made 7B7 Vacuum Tubes Lot Of FourThis lot of four US made 7B7 tubes was tested on our Paul Hart calibrated TV7 for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 41, 42, 44 and 47, respectively, where (65%) is 43 and 100% is 66. They have mica snubbers for increased vibration resistance and lowered microphonics and great flashing. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER

but will work fine in virtually all applications

terrific flashing and L2E date codes

Raytheon CK1123 Raysistor Control Circuit NOS NIB

Tube One measured 56/58 while Tube Two measured 59/56 where minimum (65%) is 50/50 and 100% is 77/77

This book is in good condition

The 7025 has somewhat-different gain characteristics than the standard 12AX7

new in box RCA 12AV6 tubes tested to spec on our Paul Hart-calibrated TV7/U

5 record cleaner and then played it on my Rega Planar 1 and played it on my Rega Planar 1

This book is in excellent condition

This tube has beautiful

new in box RCA 21KA6 tubes

new in box matched pair of Tung-Sol 6AK5 tubes was tested on our Paul Hart-calibrated TV7/U for shorts