Very highly regarded El34 Tesla. These are real Tesla, not JJ copies. They measure very well. They were measured in-circuit, biased at 45 ma, and machine check in the maxi matcher. Plate current should measure at least 30-55, and you can see they have a lot of life left.
TC should be over 5.
PC(plate current). TC(Transconductance)
1. 36.3/5.72
2. 39.3/5.74
3. 39.5/5.70
4. 35.1/5.50
5. 33.1/5.28
6. 38.1/5.26 One tube is different....unsure if it is a Tesla. It has "owko" by el34.
They will be boxed in padded valve art boxes, and in a larger box. These tubes have become very scarce and I am not separating them in pairs.
I will pay shipping/insurance, FedEx, if shipped domestically. They were in a very low use Quicksilver M135, biased at 35ma which put very low stress on them. Some paint is missing. This is my only set. All center guide pins intact.
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