All tubes are tested on a Hickok#799 tester.
Tests results on tubes available on request.
12AX7 Substitutes:
12AD7**, 12AU7**, 12AX7A, 12AX7EH, 12AX7WA, 12BZ7,
12DF7, 12DM7*, 12DT7, 5721, 5751*. 5751WA*, 5751WB*, 6057,
6681,
7025, 7025A, 7058, 7494, 7729, CK5751*, CV-492, ECC83.
*Parallel filaments.
**May not work in all circuits.
NOS:
2-12AX7/ECC83, GE, Grey Plate...$17.50/each
1-12AX7, JHS/Sylvania, Grey Plate, "D" Getter, July 1959, Similar to CV-492...$22.00
1-12AX7, Sylvania, Grey Plate, Green Label, Square Getter...$19.75
3-ECC83/12AX7A/7025, Philips, Grey Plate...$26.00/each
USED/TESTED:
1-12AX7, Aerotron, Grey Plate, Long Plate, Heavy Mica...$12.50
1-12AX7, GAP/R, Computor Grade, Grey Plate...$8.00
1-12AX7, GE, Black Plate...$10.00
1-12AX7, GE, Grey Plate...$9.00
1-12AX7, GE, Grey Plate, Long Plate...$10.00
1-12AX7, Hewlette-Packard, Grey Plate...$9.00
2-12AX7, Hewlette-Packard (GE), Grey Plate...$9.00/each
1-12AX7, JAN/CBS, Grey Plate, Long Plate...$10.00
1-12AX7, Japan, Grey plate...$7.00
1-12AX7, Micro, Grey Plate...$7.00
1-12AX7, Penta Lab, Grey Plate, Smooth Plate, W. Germany...$34.00
1-12AX7, Sylvania, Grey Plate...$9.00
1-12AX7A, Areotron, Grey Plate, Heavy Mica...$8.00
8-12AX7A, No Name, Grey Plate...$5.00/each
1-12AX7A, No Name, Black Plate...$6.00
1-12AX7A, Lafayette, Grey Plate...$7.00
1-12AX7A, Motorola, Grey Plate...$7.00
1-12AX7A, Polycom, Grey Plate...$6.00
1-ECC83/12AX7, No Name, Grey Plate...$5.00
1-ECC83/12AX7, Admiral, Grey Plate...$6.00
1-ECC83/12AX7, GE, Grey Plate...$9.00
1-ECC83/12AX7, IEC/Mullard, Grey Plate...$22.00
1-ECC83/12AX7, Japan, Grey Plate...$5.00
1-ECC83/12AX7, Layafette, Grey Plate...$6.00
2-ECC83/12AX7, Sylvania, Grey Plate...$8.00/each
1-ECC83/12AX7A, Int. Servicemaster, Grey Plate...$10.00
3-ECC83/12AX7A, National, Grey Plate...$10.00/each
1-ECC83/12AX7A, Raytheon, Grey Plate...$8.00
