40W plate dissipation, 60mA at 500 to 1000V, gain 20. 4-pin single-ended base, otherwise similar to Z2A.
Advertised in 1923. Most of the Z types had a matching rectifier which were a look-alike of the Z type. The rectifier for the Z2B was the ZG2B which had no grid and grid connection. The Z and Zg tubes were replaced in 1927.
Dimensions (l x h x p) incl.pins/tip
x 140 x 60 mm / x 5.51 x 2.36 inch
Bibliographie
-- Original prospect or advert Di tubo in tubo, Soresini, pg 97
- - Manufacturers Literature R38H 1-2-1925
-- Collector info (Sammler)
