UF41=12AC5 Ultron East Germany NOS (1 in stock)
UF85=19BY7 Telefunken NOS
UF89=12DA6 Amperex Bugle Boy Italy NOS 1963 (100/60)
UF89=12DA6 Telefunken made by Philip Italy NOS 1969-1970 (101/60)
UX-120 Radiotron used/tests 35% (low Gm=100) (display tube)
UX-201-A Radiotron used/very good 1930's (2.5ma Gm=700)
UX-201-A RCA Radiotron Balloon tests like new 1930's (read review)
UX-226 RCA Radiotron balloon used/good 1920's (3.7ma Gm=900)
UY-224 RCA Balloon used/good 1930's (37/25) (3.0ma Gm=700)
UY-224 RCA Balloon used/tests like new 1930's rattle inside base (50/25) (4.2ma Gm=1000)
UY-224A Champion Balloon used/very good 1930's (46/25)
UY-224A RCA Balloon used/very good 1930's (41/25) (2.6ma Gm=900)
VF14 or VF14M Telefunken NOS
VT-135=12J5GT RCA NOS 1940's (6.0ma)
VT-135=12J5GT Sylvania round plate NOS 1940's (11.2ma Gm=3000)
