(!!!) (Best Pair) 1625 National Union NOS 1944 (90/40 x 2 tubes)

1 pair) 1625 National Union NOS 1944 in original boxes

1) 90/40

1) 90/40 slightly tilted glass

tested on TV-7D/U

(1625=807 with 12.6V @ 450ma filament and 7 pin base, common in WWII Transmitters)

– ELKIN linear amp