(!!) (Recommended Pair) UX-171A RCA Balloon used/good 1930's (19.2ma and 18.4ma)
By Tube World
$ 109.99
1 pair) UX-171A RCA Balloon used/good 1930's in white boxes
1 tube) 19.2ma Gm=1600
1 tube) 18.4ma Gm=1700
Tested on Amplitrex
Vplate=180V
Vgrid=-38V
Good Ma = 20ma
Good Gm = 1600-1700
See more: vacuum tube
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 (Recommended Pair) UX-171A RCA Balloon used/good 1930's (19.2ma and 18.4ma)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/files/1_bf845c08-d5dc-4715-a0d4-8144c78ebf34.jpg?v=1694364613){kind=link}
 (Recommended Pair) UX-171A RCA Balloon used/good 1930's (19.2ma and 18.4ma) "Pin It")