I have 5 Rare quiet medical red tip siemens Germany labeled telefunken 12ax7 tubes with the 2 support O getter.These tube test 54-54 52-52 53-50 52-49 50-46 where 32 is the minimum good and new tubes test 48 to 50 on are tv7 tube tester.

I have 5 Rare quiet medical red tip siemens Germany labeled telefunken 12ax7 tubes with the 2 support O getter.These tube test 54-54 52-52 53-50 52-49 50-46 where 32 is the minimum good and new tubes test 48 to 50 on are tv7 tube tester.

I have 1 Strong quiet medical red tip telefunken diamond bottom rib plate 12ax7 tube.

Telefunken ECF82 valve with red tip. Diamond on base. Untested but appears in excellent condition, perhaps only lightly used if at all. I will pack carefully for sale to a UK buyer only.

I have 2 Excellent Very strong medical red tip telefunken diamond bottom Rib Plate 12ax7 tubes.These tubes test 51-54 and 51-52 where 32 is the minimum good and new tubes test 48 to 50 on are tv7 tube tester

Very Strong Red Tip Low Noise Telefunken Ulm EF86 Silver Plate 1963 Medical Grade Gm as NOS Hickok RD Instruments 1575 Tested Measuring 3000 micromhos Where 1100 is an average value

I have 2 Excellent Very strong medical red tip telefunken diamond bottom Rib Plate 12ax7 tubes.These tubes test 51-54 and 51-52 where 32 is the minimum good and new tubes test 48 to 50 on are tv7 tube tester

TELEFUNKEN EF86 RED TIP DIAMOND SILVER PLATE VACUUM TUBE. Listed as used since I have no way of telling otherwise. Date code is U7202304 which I think equates to Ulm 27th March 1962. Has halo getter which looks in good condition. Tested the heater with a bench power supply at 6.3V and 0.2A. See pics. Will package for safe transit. For International buyers please contact me and I can let you know fees depending on where you are.

To offer is a good pair of tubes white tipped ecc83 tubes. Its too bad they have no gold pins they would be the other high end ecc803s. These are really good tubes I found these in a ultrasonic recording system made by Boonton electronics and I kept them only for reference. They are matched tests within 2%. Will arrive as described and as pictured. Thanks for looking

Telefunken ECF82 valve with red tip. Diamond on base. Untested but appears in excellent condition, perhaps only lightly used if at all. I will pack carefully for sale to a UK buyer only.

Very Strong Red Tip Low Noise Telefunken Ulm EF86 Silver Plate 1963 Medical Grade Gm as NOS Hickok RD Instruments 1575 Tested Measuring 3000 micromhos Where 1100 is an average value

TELEFUNKEN EF86 RED TIP DIAMOND SILVER PLATE VACUUM TUBE. Listed as used since I have no way of telling otherwise. Date code is U7202304 which I think equates to Ulm 27th March 1962. Has halo getter which looks in good condition. Tested the heater with a bench power supply at 6.3V and 0.2A. See pics. Will package for safe transit. For International buyers please contact me and I can let you know fees depending on where you are.

Telefunken ECF82 valve with red tip. Diamond on base. Untested but appears in excellent condition, perhaps only lightly used if at all. I will pack carefully for sale to a UK buyer only.

Very Strong Red Tip Low Noise Telefunken Ulm EF86 Silver Plate 1963 Medical Grade Gm as NOS Hickok RD Instruments 1575 Tested Measuring 3000 micromhos Where 1100 is an average value