1 3

Classic Currents

(1) Tested National Union 6SF7 Tube Code PN Diode Super Control Pentode Tube

(1) Tested National Union 6SF7 Tube Code PN Diode Super Control Pentode Tube

Tested and Guaranteed

$8.95 USD
$8.95 USD
Sale Sold out
Shipping calculated at checkout.
(1) Tested National Union 6SF7 Tube.
Date Code PN.

The wording is faded but still legible.
The handwritten change of date code in white was done during production.

Tested on a calibrated Hickok TV-10 military tube tester with no shorts and no leaks with the following results:

Gm Test = 2450 micromhos
Minimum pass/good = 1260
The diode section tests at 1250 where 800 is the minimum pass/good.

~ Please view all 3 photos ~
View full details

View All