Tube 42 or Röhre 42 ID2672, Vacuum Pentode, 6-Pin-Base U6A, old, USA and Power/Output shown. Radio tubes are valves.

New-Old-Stock (NOS) tube. 42 is a pentode amplifier designed for application in power output stages of receivers. With the exception of heater ratings, their electrical characteristics are identical to the 6F6, 6F6GT, and 2A5. Note: brands may vary. Photo is for reference only and may not exactly represent final product received.

The 42 is an audio output pentode, with a low output rating, but when used in push pull a pair could deliver 18.5 Watts in class AB2. Also on a UX6 base is the 2.5 Volt 2A5 that is electrically equal to the type 42.

Apr 5, 2010 · I recommend 42 for straight pentode operation rather than triode or ultra-linear/Williamson operation as straight suppressor-grid pentodes. Pentode ckts for 6AQ5 and 6BQ5 should be adaptable to 42. 6AQ5 pentode ckts may be adaptable to 41, compare specs and ckt parameters before proceeding.

This listing is for a Pair (2) of Type 42 Pentode Power Amplifier Antique vacuum tubes in the ST (Coke Bottle) tube shape. They have a engraved black 6-pin UY base, black plate, and foil D getter. Your tubes have been fully tested on a computer-regulated Amplitrex AT1000 on Fixed Bias setting wi...

1 Silvertone 42 Vacuum Tube. Hickok TV-7D/U test reads 80. This tube is from 1930's USA production. It still has a test sticker from 1943.

Arrived today as pictured and described. Reasonable price and shipping. Tested a bit low as stated, but still usable. Would do business with again.

PENTODE VACUUM TUBE. Silvertone Type 42. AMPLIFIER TUBE. POWER TYPE TUBE. Black Plate. Clear Glass. TESTED STRONG. TESTED on HICKOK TV-7.

Tube UZ 42 or Röhre UZ42 ID25493, Vacuum Pentode, 6-Pin-Base U6A, old, USA and Power/Output shown. Radio tubes are valves.

Plastic 6-pin base with aquadag coating, BT-shaped envelope. Base stamped: "Philco / Made in U.S.A."; on envelope: "42". Reference: https://www.radiomuseum.org/tubes/tube_42.html.