2 National Union NU Number / Type 41 #41 Vacuum Tubes Clear Bottle Lot Of Two 1A7GT Grid Cap engraved bases and narrow rectangular

engraved bases and narrow rectangular mica spacers

I am playing them in my Sound Craftsmen RC-2 monoblocks (as an "excellent" 6SN7 substitute according to Antique Electronic Supply's "Tube Substitution Guidebook") with "Hanson Conducts Ives

Flashing Quality: good

There was no gas

Tube Three: 40/2120 and

2 National Union NU Number / Type 41 #41 Vacuum Tubes Clear Bottle Lot Of Two 1A7GT Grid Cap engraved bases and narrow rectangularThese two National Union clear bottle type number 41 tubes tested as follows on our Paul Hart calibrated TV7 U: 54 and 60 where minimum (65%) is 40 and 100% is 62. 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