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There was enough NOS around. Here you see a close up of the gold plated grid bars coming out of the mica. Russians and Chinese tube factories raise their prices twice a year due to higher energy costs and higher cost of all kinds. I got a higher price than expected, and the buyer jk satisfied he wrote me.
E88CC / Gold Balanced JJ :: JJ Gold Premium :: JJ Tesla :: Tubes :: Banzai Music GmbH
These are little jewels. The next difference I noted, are some costs savings on the shielding. These are from the ‘s. What a quality this is! Bidders e8cc fighting for them.
They are regarded something different, which is correct. Many people thought this situation would always stay that way, and the TESLA management thought so too. I though they need some more burn-in perhaps. The machines were moved out of the building and reinstalled at a factory of a man called Jan Jorgo, better known as JJ.
Oh well, I thought one bad tube out of 20 can happen. The shielding plate was coated black, and is used to transport the heat out of the tube center. This was curious, because with NOS, I never had this.
E88CC / 6922 JJ
How typical for Ebay. Then after the initial heat-up, the Tesla’s s88cc their readings only very little, and give a totally stabile reading after just minutes.
I sold this lot where it belongs: Well, then everybody is happy. Most of them have yellow printing.
e888cc Then I let one tube warm up, and apparently it started to reduce plate current slowly. Identical tools are used Another difference is in the part numbering. I wrote in the Auction why I sold them, and they were with the option to return if not satisfied. On my tube tester Metrix U61B jjj they tested very nice. The used materials definitely are not the same. Then they keep just this value no matter how long hours or days I let the tester run.
This is great, because the center anode plate is already hotter than the outside anode plate. Same as with all NOS when I see that. Well ok, JJ is new production, so I thought this was the explanation. In the below picture you can see this difference clearly. Only ij machines are the same, and in the Tesla days they were new, and now they are old.
So obviously they did not use just gold plated grid wire, they gold plated the complete grid after it was made. So is is used a cooling fin. This is one difference.
Also wires, and nickel technology came from Tesla plants that are all closed now. First of all, the needle of the tube tester goes up faster as with the JJ’s, and that gave me a good feeling.
So I let the tube run on the tester, and the next day it was testing weak. With this tube there is a shielding plate between e88cc two triodes.