ECC88 page sheet date. 1. 1. 2. 2. 3. 3. 4. A . 5. B. 6. C. 7. FP. Page 1. Page 2. Page 3. Page 4. Page 5. Page 6. Page 7. Page 8. Page 9. Page Page Page Page Page Page Page Eech test must be in between following limits: ECC 6DJ8. 6,3V. is balanced and matched, per datasheet specification, this is highest.
All from the same factory code. For a true happened story, read the world of NOS. Is your ECC88 humming or making noise? Very good selected, and this batch has very high test values. HQ tubes made for the Czech post, from the Rosnov factory Code These come with Amplitrex computer test report.
It is ec88 much but we have to say it. Large dimension ECC88, with higher dissipation. This is the reason why JAN tested tubes are so often agvailable as commercial tubes also!! These were made for the military, as you can see from the sword signs on the back side of the tube. Everything you want to know about how tube specsare determined, from flywheel shock testing to altitude testing to salt spraycorrosion resistance.
Click Here for sheeton Sovtek 6B4-G. Strangely so, but I see it over and over again. Left tube on the picture. JAN tested, for higher reliability.
JJ Electronic – E88CC / , 6DJ8 – gold
Can’t find it here? JAN Testing is a military proces for lot qualification, which makes sure that weak production series will not pass as a whole. So you think you buy NOS, but they’re not. This is probably the best ECC88 scc88 made. Meaning they are EI tubes. This tube excist as normal grid tube and as frame grid tube. However they bias not as trhey shouls in all circuits, and have slightly lower gain.
This is confirmed by the construction, there is datenblaty characteristical A-Shaped getter holder inside, and more details. On internet auction sites, tubes are re-labelled, retro-gold plated, re-branded and used tubes are put in re-printed new boxes with the stamps ne-newed.
Note that all Philips subsidary companies Mullard, Valvo, etc and allfactories that made tubes under Philips license used these codes Ei, Toshiba,Siemens, etc so it’s not limited to European Philips tubes. This is a very hard way of testing, since “good” tubes must still be rejected when they come from a production series where too many have failed the JAN tests. When it writes on there “ECC88, 1 ” as you see on the picture here this means this tube was made in Germany, indicated by the number “1”.
So you take samples, you overload them for a certain time, and when too many fail the whole lot is rejected. Original old blue boxes.
The “Help,My Amp has ‘s! The ones we sell, are “EB”, also when not specified like this, it’s what they are. Try searching the Tube Data Sheet Locatorthe world’s biggest index of tube datasheets.
The Big Tube Data Page
They are waiting for you there. This is a jewel.
Called Uf Test with Voltmeter between Pin 4 and 5. Please note that these are OEM spec sheets,except for some of the Resistance Coupled Amplifier charts, you will not be downloading any pages of a regular tube manual that you already have.
Now of course manufacturers could still sell such tubes on the commercial ecc88, but the military refused to take those. Number “2” would mean outside Germany. Here are the possible answers, only ONE answer is correct. Curve plots for popular current production12AX7’s: KT90 Note, larger 2 pages wide files, about 80Kbytes each.