Page 1. Page 2. Page 3. Page 4. Page 5. Page 6. Page 7. Page 8. The is described as being for use in cascode circuits and as a multivibrator and cathode follower in References: Datasheet & private correspondence. E88CC-TK TUBE DATA SHEET. Mechanical. Also known as the , the E88CC was originally targeted for test equipment and radar. The E88CC has.

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That depends on the circuit specially if it is dc coupled and the components also but it is possible that this can happen. So I have trouble believing your information. Let’s keep dataheet simple.

For the test a Hickok a tube tester was used. Steve on 25 Jan Slightly different spacing between each turn of wire. If we keep the plate current constant, altering the grid to cathode voltage will cause the plate to cathode voltage to change. With this datashest the difference in imbalance voltage between the two plates was less than 1Vdc.

This is indication of non-linearity. The final limitation is the maximum allowable cathode current Ic. Cookies help us provide you a better browsing experience. In the circuit below is biased by applying a bias voltage to the grid via R2. Next read note 7 And there is the rub. This string will be long gone. And yes I tried. The filament may not be perfectly spaced from the nickel sleeve, inside the cathode sleeve, causing hot spots etc, thus more emission on some areas of the cathode.

They are maximum anode voltage Va and Va b. I think I understand the reason why when looking at the VT50 circuit design datxsheet the driver tube. I will say he is well known and respected.

By using our site, you consent daasheet the use of cookies by us. So, where does close matching of GM come into play? Quote For what it’s worth there is a tube life test that can be preformed on a used tube where the filament voltage is decreased in the same manner as I did in my test above.


So i won’t count on a very long life for a normal tube. Whether the reduction in hfr will affect one’s perception will depend upon several factors.

The plate structure between sections may be sheped slightly different. For general public, consider evaporation of water cools the remaining container of water. Nope that’s not what I was attempting to ask.

The plate structure may not be placed exactly the same in relation to the cathode and grid. However, there datasneet extenuating circumstances involving heavy ratasheet current and increased frequencies into the high MHz, and depending upon the tube, in which transit time becomes a problem. Mu amplification factor is theoretical gain. So my question is–do s these are 7DJ8s need time to warm up, burn in, or otherwise sound right?

Steve dattasheet 28 Jan I’ve gotten used to a very nice solid state pre, and then when that died, listened straight from the DAC to the dataheet, so maybe this is what it always sounded like, but it doesn’t seem right and I’m not that crazy about it. Moreover, some of this vapour tends to deposit on the grid and give rise to what is known as grid emission when the grid itself emits electrons and draws current commonly known as negative grid current Note, not so for 6922 VT mrk 3 amp, different circuitry.

E55l2 on 26 Jan Designing a circuit to operate around the cut-off point is not advisable if a good linearity of an amplifier is required.

These tubes were also bought as closely matched low noise tubes from well respected tube vendors. Non-linearity dqtasheet particularly profound close to the Volt point. You can’t set the two plate voltages of each tube individually. As far as transconductance being reduced, reduced transconductance will increase the plate resistance, thus lowering the high frequency response.


6922 Datasheet

I am not sure where you come up with the hours, except to say that covers power tubes as well, and is under manufacturer’s warranty. By the way, Telefunken was known for gettinghours on their 12ax7 “family” under typical conditions. Jim, I don’t datashheet any issue with you tagging onto this thread, but you might want to start another thread just so folks with a similar question in the dtaasheet might be able to more easily find the information.

Normally one thinks of resistance as being voltage divided by current equals resistance. RCA have a special range of tubes, the “red base”. See numbers 4 and 5 for setting the input and driver tubes plate voltage on the PDF Link provided.


ACHiPo on 15 Jan Simply reading a “specification” sheet of typical operation does not cover all aspects of operation, since spec sheets only cover very basic operating principles, not exhaustive by any means.

Kinda makes me want to sit around the fire and sing Cumbaya.

Rp is plate resistance of a tube section, triode, tetrode, pentode etc. Cheers Steve Quote Steve said: E55l2 on 28 Jan Steve, You’re playing well within bounds as far as I’m concerned, and I’m learning a heck of a lot in the exchange, so thank you. What do you or those costumers mean with tube life? Maybe a bit better then the i say before but after h it is really a lot less then it was new.

The cathode material may be slightly warped, thus the relationship between each cathode to grid and plate may be slightly different.