1 5

Classic Currents

(1) Tested RCA Radiotron UX-120 Tube Rainbow Glass Type 20 Tube UX120 Tube (j)

(1) Tested RCA Radiotron UX-120 Tube Rainbow Glass Type 20 Tube UX120 Tube (j)

Very Strong and Testing as NOS.

$74.95 USD
$74.95 USD
Sale Sold out
Shipping calculated at checkout.
(1) Tested 1920s RCA Radiotron UX120 (Type 20) Tube.
Beautifully unique 'Rainbow Glass' envelope.
Engraved base with brass pins.

There is a very small hairline crack above the letter "R" on the base - see photo 4.

This tube tests as NOS.

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

Gm Test = 525 micromhos
Minimum pass/good = 330
NOS rating = 495

~ Please view all 5 photos ~
View full details

View All