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UBC81=14G6 Brimar France NOS (1 in stock)
UBF80=17C8 Telefunken Diamond NOS
UBF89=19FL8 Valvo by Mullard NOS (2 in stock)
UCC85=26AQ8 Amperex Bugle Boy Holland NOS 1965 (2 in stock)
UCL82=50BM8 NOS (1 in stock)
UCL83 Mullard NOS 1958
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 Germany NOS 1963 (102/60)
UF89=12DA6 Telefunken made by Philip Italy NOS 1969-1970 (107/60)
UX-120 Radiotron used/tests 35% (low Gm=100) (display tube)
UX-201-A Radiotron used/good 1930 era (2.4ma Gm=550)
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
