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