The ECC88 is a VHF double triode with separate cathodes. The ECC88 was is 48 mm tall. References: Datasheet &. Type ECC88 was first introduced in ECC88 page sheet date. 1. 1. 2. 2. 3. 3. 4. A . 5. B. 6. C. 7. FP. The 6DJ8/ECC88 is a frame grid sharp cut-off twin triode with separate cathodes designed for use in cascode circuits, RF and IF amplifiers, mixer and phase in-.
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This batch had very good values. These were made for the military, as you can see from the sword signs on the back side of the tube.
This is not normal for E88CC, test values can vary widely, and you have to take them as is. Meaning they are EI tubes. Datzsheet others are gone, gone, gone. Also you should try the Svetlana types 6N1P. Used, but look and test like new. These appear like that.
They test all at 15mA, with grid voltage variation of less than 0,2 Volt!! So you take samples, you overload them for a certain time, and when too many fail the whole lot is rejected. So with them, what you pay is what you get. JAN Testing is a military proces for lot qualification, ddatasheet makes sure that weak production series will not pass as a whole.
For the rest every little detail is identical. So if you order for instance tube 4 from this list, it is pre-matched with tube 8. The ones we sell, are “EB”, also when not specified like this, it’s what they are. Perfect quality, good boxes. Well, I think experience and detailed product knowledge is the same! These datasjeet the later technology, and also a technology only very few could make. Please note with some not with all the print text has suffered somewhat from storage. It is not much but we have to say it.
Tube is offered as used, but may be new. For a pair, order two pieces, they are automatically packed as matched pairs if you do so.
However not with those! When frame grid tubes, we write it in the description. On internet auction sites, tubes are re-labelled, retro-gold plated, ec8c8 and used tubes are put in re-printed new boxes with the stamps ne-newed.
If you don’t know the answer They are pre-selected in pairs.
All from the same factory code. This pair has printed on the glass: Mind you they draw twice the heater current. JAN was the first choice, the rest got sold commerically. Done so in when these were made, but JAN testing is still used for semiconductors as well. If you want a single you can only take the ones we have, we can not break up a pair for datasheett. Now of course manufacturers could still sell such tubes on the commercial market, but the military refused to take those.
Anyway, not reading the datasheet may work with most tubes, but not with all. It’s an incredible mess at the moment. JAN tested, for higher reliability. Unfortunally a big item particularly with this tube number.
Buy only from reliable sources! To give you an idea, the size of a large bacteria is 5um. Interesting detail with the tube box. Don’t trust it when a sellers offers those repeatedly for low prices.
Note, National was a tube re-branding company of very good reputation. The rejects were probably sold a standard 6N1P, this is normal.
HQ tubes made for the Czech post, from the Rosnov factory Code The frame grids have generally better parameter stability, lower noise and lower hum. Called Uf Test with Voltmeter between Pin 4 and 5. With good test value also, but these we could not match. May seem a silly advice, but it is a popular mistake.
Sorry, only one tube left.