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 The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 45 mm tall. References: Datasheet &. Type E88CC was first introduced. Page 1. Page 2. Page 3. Page 4. Page 5. Page 6. Page 7. Page 8.
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Meaning they are EI tubes. Made on Philips machines. This is not normal for E88CC, test values can vary widely, and you have to take them as is.
This pair has printed on the glass: This may help you more than changing tubes. On internet auction sites, tubes are re-labelled, retro-gold plated, re-branded and used tubes are put in re-printed daatsheet boxes with the stamps ne-newed.
This batch had very good values.
Check also dqtasheet item, below here. Frame grid wires can be as thin as 10um, which is technologically speaking a masterpiece of fine mechanics. These tubes are boxed and e8c8c “National” USA.
JAN was the first choice, the rest got sold commerically. Not directly compatible to ECC88, so a secret tip if you can design your won circuits. It’s an incredible mess at the moment. May seem a silly advice, but it is a popular mistake.
Now that EI is closed sinceprices of EI tubes are expected to soar. Sorry, only one tube left. Buy only from reliable sources!
E88CC @ The Valve Museum
These are no JJ Tubes! Leave it up to a technician otherwise. When you refer to darasheet datasheet details, they say they don’t need to know, they have already “30 years experience”. Is your ECC88 microphonic? Don’t try to be Mr. So if you order for instance tube 4 from this list, it is pre-matched with tube 8.
E88CC Datasheet PDF
This is a much improverd version of ECC88 made, with higher voltage capabilities, higher plate dissipagtion, and better in many many ways. Clear white print like new, from spare equipment. These have lower noise, and dattasheet distortion. Anyway, not reading the datashwet may work with most tubes, but not with all. With good test value also, but these we could not match. Factory does not excist any more: This is the reason why JAN tested tubes are so often agvailable as commercial tubes also!!
Some tubes from equipment are sometimes actually never used. Called Uf Test with Voltmeter between Pin 4 and 5. Click for high resolution picture here.
6922/ECC88/E88CC double triode
This is not possible for the most wanted part numebrs. These come with Amplitrex computer test report. HQ tubes made for the Czech post, from the Rosnov factory Code E8cc, National was a tube re-branding company of very good reputation. The frame grids have generally better parameter stability, lower noise and lower hum.
These appear like that. Elektronska Industri, former Yugislavia.
JJ Electronic – E88CC / , 6DJ8 – gold
Mind you they draw twice the heater current. Done so in when these were made, but JAN testing is still used for semiconductors as well. This is probably the best ECC88 ever made.
This is confirmed by the construction, there is the characteristical A-Shaped getter holder inside, and more details. If you don’t know the answer Is your ECC88 humming or making noise? JAN Testing is a military proces for lot qualification, datashset makes sure that weak production series will not pass as a whole. All tube data there is, including gain, Gm, Plate impedance, grid leakage, etc, and compare it against “must be” values.
So all four systems of this pair are the same. High Quality tubes from the Prague factory Code Perfect quality, good boxes. So with them, what you pay is what you get.