Kiramar These are no JJ Tubes. All others are gone, gone, gone. This was told to me by a retired Telefunken Ulm Employee, so I think this is very reliable information. If you want a single you can only take the ones we have, we can not break up a pair for it. Even with top-name amplifier manufacturers we see the same old errors, resulting from arrogancy, like not reading a datasheet.
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Nikogar Done so in when these were made, but JAN testing is still used for semiconductors as well. You datenblxtt order any pair you like, as long as we have it available. Some tubes from equipment are sometimes actually never used.
Note, National was a tube re-branding company of very good reputation. Now of course manufacturers could still sell such tubes on the commercial market, but the military refused to take those. They are pre-selected in pairs.
Click for high resolution picture here. They were supplied with first class tubes by the manufacturers, and the country of origin is always printed on the tubes.
However not with those! Read below, how to connect the voltmeter. 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. Click Here for sheeton Sovtek 6B4-G. Strangely so, but I see it over and over again. Resistance Coupled Amplifier Charts: When no, then skip this text. Mind you they draw twice the heater current.
The frame grids have generally better parameter stability, lower noise and lower hum. Used tubes of this type generally have more hum and noise. Here are the possible answers, only ONE answer is correct. Unfortunally a big item particularly with this tube number. JAN tested, for higher reliability. 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.
Leave it up to a technician otherwise. ECC88 Datasheet This is not possible for the most wanted part numebrs. Like this, and no other way! Used, but look and test like new. This may help you more than changing tubes. For a pair, order two pieces, they are automatically packed as matched pairs if you do so. Frame grid wires datenblat be as thin as 10um, which is technologically speaking a masterpiece of fine mechanics.
ECC88 DATASHEET PDF
Large dimension ECC88, with higher dissipation. Electrically not compatible! Tube fraud: Unfortunally a big item particularly with this tube number. 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. Lucky on internet auction sites. They are waiting for you there. This is not possible for the most wanted part numebrs.
Takora May seem a silly advice, but it is a popular mistake. Printing is fainted, but unburned, very white still. So you take samples, you overload datnblatt for a certain time, and when too many fail the whole lot is rejected. What is best, we had a small lot, and we have been able to select them all in perfectly balanced and matched pairs. The frame grid wire is so thin, when you open up a defective datenblatr, you can not see it with the bare eye.
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. Clear white datashewt like new, from spare equipment. This is a much improverd version of ECC88 made, with higher voltage capabilities, higher plate dissipagtion, and better in many many ways. May seem a silly advice, but it is a popular mistake.