NOS and Used
Vacuum Tube Products and Price List.
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TUBE SUBSTITUTION LIST
U.S.A. LETTERS
A245 THRU Y2057

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

TO REPLACE	USE
A245	45, 57T245, 145, 245, 245-C, 445, C-245, CX345, ER45, EX645, MX245, PH245, SX245, UX245,
A4434	6H15N, 6J6, 6J6A, 6CC31, 6030, 7244, ECC91, TS52
C11	11, WD11, UX112/A
C245	45, 57T245, 145, 245, 245-C, 445, A245, CX345, ER45, EX645, MX245, PH245, SX245, UX245,
CX71A	57T171A, 071A, 71A, 4616_WLS, J71A, CX371A, UX171A, X-171A
CX112	D412, MX112, UX112, X112
CX299	57TX99, 99, 99X, 199, 299, 399, 2952, CX399, ER-X199, OKX-199, UX99, UX199, UX299
CX345	45, 57T245, 145, 245, 245-C, 445, A245, C-245, ER45, EX645, MX245, PH245, SX245, UX245,
CX371A	57T171A, 71A, 071A, 4616_WLSJ71A, CX71A, CX371A, UX171A, X-171A
CX399	57TX99, 99, 99X, 199, 299, 399, 2952, CX299, ER-X199, OKX-199, UX99, UX199, UX299
CK548DX	6418, CK6418
CK6418	6418, CK548DX
D-50	6JE6C, 6LQ6, 6MJ6, 7535
D412	CX112, MX112, UX112, X112
ER45	45, 57T245, 145, 245, 245-C, 445, A245, C-245, CX345, EX645, MX245, PH245, SX245, UX245,
ER551	35, 51, 551, ER-551
ER-551	35, 51, 551, ER551,
ER-X199,	57TX99, 99, 99X, 199, 299, 399, 2952, CX299, CX399, OKX-199, UX99, UX199, UX299
EX645	45, 57T245, 145, 245, 245-C, 445, A245, C-245, CX345, ER45, MX245, PH245, SX245, UX245,
GZ34	5AR4, U77
J71A	57T171A, 071A, 71A, 4616_WLS, CX71A, CX371A, UX171A, X-171A
M2057	2057, Y2057
MX112	CX112, D412, UX112, X112
MX245	45, 57T245, 145, 245, 245-C, 445, A245, C-245, CX345, ER45, EX645, PH245, SX245, UX245
NL-760	760, 6858,
NL-760L	760L, 7023
NL-760P	760P, 6859
OKX-199	57TX99, 99, 99X, 199, 299, 399, 2952, CX299, CX399, ER-X199, UX99, UX199, UX299
PH245	45, 57T245, 145, 245, 245-C, 445, A245, C-245, CX345, ER45, EX645, MX245, SX245, UX245,
S2001	6146, 6146A, 298,
S2001A	6146B, 6146W, 7212, 8298A, QE05/40, YL1370
SX245	45, 57T245, 145, 245, 245-C, 445, A245, C-245, CX345, ER45, EX645, MX245, PH245, UX245,
T160L	572B
TK-62	6116
TS52	6H15N, 6J6, 6J6A, 6CC31, 6030, 7244, A4434, ECC91,
UX34	34, UF134 (Japan), UX-34 (Japan), VT-54
UX99	57TX99, 99, 99X, 199, 299, 399, 2952, CX299, CX399, ER-X199, OKX-199, UX199, UX299
UX112	CX112, D412, MX112, X112
UX112/A	11, C11, WD11,
UX171A	57T171A, 071A, 71A, 4616_WLS, CX71A, CX371A, J71A, X-171A
UX199	57TX99, 99, 99X, 199, 299, 399, 2952, CX299, CX399, ER-X199, OKX-199, UX99, UX299
UX245	45, 57T245, 145, 245, 245-C, 445, A245, C-245, CX345, ER45, EX645, MX245, PH245, SX245,
UX299	57TX99, 99, 99X, 199, 299, 399, 2952, CX299, CX399, ER-X199, OKX-199, UX99, UX199
UY33	33, UY-33 (Japan), UZ133D (JAPAN)
UY227 / UY-227	27, 127, 227, 327, 427, AY225, AY227, C327, F209A, G-27, P227_USA, PH227, PU027
WD11	11, C11, UX112/A
WL6660	6BA6
WL6661	6BH6
WL6662	6BJ6
WL6663	6AL5
WL6664	6AB4
WL6669	6AQ5
WL6676	6CB6A
WL6677	6CL6
WL6678	6U8A
WL6679	12AT7
WL6680	12AU7
WL6681	12AX7, ECC83
X112	CX112, D412, MX112, UX112
Y2057,	2057, M2057

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