June 14, 2020

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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The rejects were probably sold a standard 6N1P, this is normal. Now that EI is closed sinceprices of EI tubes are expected to soar. Note, National was a tube re-branding company of very good reputation. These tubes are exc88 and branded “National” USA. So if you order for instance tube 4 from this list, it is pre-matched with tube 8.

Well, I think experience and detailed product knowledge is the same! Here is a Link to all test reports. When it writes on eatasheet “ECC88, 1 ” as you see on the picture here this means this tube was made in Germany, indicated by the number “1”.

  ASTM C1060 PDF

ECC88 Datasheet

Meaning they are EI tubes. This batch had very good values. All from the same factory code.

They test all at 15mA, with grid voltage variation of less than 0,2 Volt!! May seem a silly advice, but it is a popular mistake.

All others are gone, gone, gone. Elektronska Industri, former Yugislavia.

(Datasheet) ECC88 pdf – Double Triode (1-page)

Datashest can order any pair you like, as long as we have it available. They are pre-selected in pairs. NOS original box Order nr for a matched and balanced pair: Now of course manufacturers could still sell such tubes on the commercial market, but the military refused to take those.

This is probably the best ECC88 ever made. Printing darasheet fainted, but unburned, very white still. Please note with some not with all the print text has suffered somewhat from storage.

Number “2” would mean outside Germany. These have lower noise, and less distortion.

All tube data there is, including gain, Gm, Plate impedance, grid leakage, etc, datahseet compare it against “must be” values. When frame grid tubes, we write it in the description. For the rest every little detail is identical.


Not directly compatible to ECC88, so a secret tip if you can design your won circuits.

E88CC Datasheet(PDF) – NXP Semiconductors

It is not much but we have to say it. Only do these measurements inside your amplifier, when you have experience with this. When no, then skip this text. With good efc88 value also, but these we could not match.

JAN tested, for higher reliability. These appear like that. This is confirmed by the construction, there is the characteristical A-Shaped getter holder inside, and more details.

Unfortunally a datassheet item particularly with this tube number.

Mind you they draw twice the heater current.