Raytheon Type BH B-H Vacuum Tube Valve Rectifier Globe Bottle NOS NIB September 15 2024

Raytheon Type BH B-H Vacuum Tube Valve Rectifier Globe Bottle NOS NIB September 15 2024This new old stock, new in box Raytheon BH rectifier tube has not been tested yet. Sold as is until I find a setting. This is a rather early tube, probably from the second half of the 1920s. 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

and if it is

Transconductance: 2200 micromhos Transconductance: 2270 micromhos

There were no shorts or gas and it measured 40/44 where minimum (65%) is 32/32 and 100% 66/66

It was made in South Korea

but I do not know its operating voltage

new in box Sylvania 14F7 tube tested to spec on our Paul Hart-calibrated TV7/U

Philco-LABELED 6K6GT tubes was tested on our Maxi-Matcher 400 volts on the plates and a bias of -36 volts for shorts

There is a shield between the triodes for reduced cross talk

They measured 76/82

It was made in Germany

transconductance and gain

These five GE-MANUFACTURED 12V6GT power tubes were tested on our Paul Hart-calibrated TV7 for shorts