Matched Pair Ken-Rad 6V6 6V6GT Vacuum Tubes February 23 2024 They have 56-26 188-4 and

They have 56-26 188-4 and 61-26 188-4 date/provenance codes

Tube Five: 29

These nine Philco type / number 41 tubes tested as follows on our Paul Hart-calibrated TV7/U:

One is a 12AZ7 while the other three are 12AZ7As

These tubes have lyre-shaped getters

Matched Pair Ken-Rad 6V6 6V6GT Vacuum Tubes February 23 2024 They have 56-26 188-4 andThis matched pair of Ken Rad 6V6GT output tubes was tested on our Maxi Matcher 2 for shorts, gas and transconductance. There were no shorts or gas. Plate current measured 14. 5 milliamps and transconductance was 1960 micromhos for Tube One. Tube Two measured 15. 3 2310 (New US made 6V6s typically test with plate current from the mid teens to mid 30s with transconductance from 2300 micromhos or so.) These tubes have tall bases; standard black and