2D21 United Russian NOS (4 in stock)
By Tube World
$ 4.79
4) 2D21=5727 Russian NOS 1970's
(2D21 is a miniature 2050, Vfil=6.3V @ 600ma, 1.3Kv PIV, 100ma max)
(USES: delay, grid-controlled rectifier, pulse-modulator use, also broadband
noise generator, developed in 1944) (argon gas)
See more: vacuum tube
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