NOS and Used
Vacuum Tube Products and Price List.
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TUBE SUBSTITUTION LIST
71A - 99

* These are parallel filament circuits.
# In series circuits, this tube doesn't need any form of regulated warm up time.

TO REPLACE	USE
71A	57T171A, 071A, 4616_WLS, J71A, CX71A, CX371A, UX171A, X-171A
99	57TX99, 99X, 199, 299, 399, 2952, CX299, CX399, ER-X199, OKX-199, UX99, UX199, UX299
99X	57TX99, 99, 199, 299, 399, 2952, CX299, CX399, ER-X199, OKX-199, UX99, UX199, UX299

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