Siemens Ribbed Plate 12AX7 ECC83 Vacuum Tube The Rainbow Strings Side Four is more like

Side Four is more like a 6

but that was the fashion back in the 1940s

This Raytheon 12AZ7 dual triode was tested on our Paul Hart-calibrated TV7/U for shorts

These ten Sylvania 29LE6s tested to spec on our Paul Hart-calibrated TV7/U

This hardcover book is in very good condition

Siemens Ribbed Plate 12AX7 ECC83 Vacuum Tube The Rainbow Strings Side Four is more likeThis Siemens ribbed plate 12AX7 ECC83 dual triode was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas and they measured as follows: It measured a perfectly balanced 44 44 where minimum (65%) is 32 32 and 100% is 49 49. It has copper support rods; 12MM ribbed plates; excellent flashing and an O getter with two rather than one supports. It has the requisite Siemens stamped metal plate just above