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Bidders were fighting for them.

With this tube there is a shielding plate between the two triodes. These are little jewels.

JJ Electronic – E88CC – , 6DJ8

I wrote in the Auction why I sold them, and they were e88xc the option to return if not satisfied. Also wires, and nickel technology came from Tesla plants that are all closed now. Russians and Chinese tube factories raise their prices twice a year due to higher energy costs and higher cost of all kinds.

There was enough NOS around.

The machines were moved out of the building and reinstalled at a factory of a man called Jan Jorgo, better known as JJ. Here you see a close up of the gold plated grid bars coming out of the mica. The next difference I noted, are some costs savings on the shielding. Only the machines are the same, and in the Tesla days they were new, and now they are old.


In the below picture you can see this difference clearly. Well, then everybody is happy. They are regarded something different, 8e8cc is correct.

I got a higher price than expected, and the buyer was satisfied he wrote me. Then after the initial heat-up, the Tesla’s change their readings only very little, and give a totally stabile reading after just minutes.

E88CC / 6922 Gold Balanced JJ

First of all, the needle of the tube tester goes up faster as with the JJ’s, and that gave me a good feeling. This was curious, because with NOS, I never had this. Then I let one tube warm up, and apparently it started to reduce plate current slowly.

Well ok, JJ is new production, so I thought this was the explanation. Many people thought this situation would always stay that way, and the TESLA management thought so too. Most of them have yellow printing. Oh well, I thought one bad tube out of 20 can happen.


I sold this lot where it belongs: On my tube tester Metrix U61B initially they tested very nice. These are from the ‘s.

Then they keep just this value no matter how long hours or days I let the tester run. So is is used a cooling fin. This is great, because the center anode plate is already hotter than the outside anode plate. Identical tools are used Another difference is in the part numbering. This e88fc one difference.

E88cc I let the tube run on the tester, and the next day it was testing weak. The shielding plate was coated black, and is used to transport the heat out of the tube center. I though they need some more burn-in perhaps. So obviously they did not use just gold plated grid wire, they gold plated the complete grid after it was made. What a quality this is!

The used materials definitely are not the same. How typical for Ebay. Jh as with all NOS when I see that.