Matched Pair Amperex 6BL8 Vacuum Tubes Valves 7199 Substitute New Sound Of Los

Matched Pair Amperex 6BL8 Vacuum Tubes Valves 7199 Substitute New Sound Of LosThis matched pair of French Amperex 6BL8 pentode triode tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 38 39 for Tube One and 41 35 for Tube Two where minimum (65%) is 34 36 and 100% is 52 55. As I write, I am listening to them with adapters in my Dynaco Stereo 70. They make excellent 7199 substitutes and sounded great in my amp. They were played with

These Ken-Rad-MANUFACTURED

selected 6L6s

new in box GE 6HB7 tubes tested to spec on our Paul Hart-calibrated TV7/U

hanging filaments and outstanding flashing

new in box Sylvania 6HS8 tubes tested to spec on our Paul Hart-calibrated TV7/U

new in box 12FM6 tubes tested to spec on our Paul Hart-calibrated TV7/U

side O getters and excellent flashing

This new old stock-testing almost-perfectly-matched pair of Sovtek 6BQ5 / EL84 / 6P14 / 6P14P output tubes was tested on our Maxi-Matcher 2 -- with 325 volts on the plates and a bias of -14 volts -- for shorts

they were very brittle

This lot of three Ken-Rad 6D6 tubes was tested on our Paul Hart-calibrated TV7/U for shorts

25 watt precision resistors new old stock

It sounds terrific and has great bass and sparkling highs and Mayall’s voice is warm and clear as a bell