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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At less filament voltage, the carbonates evaporate less, so grid contamination is less over time, a plus. Non-linearity is particularly profound close to the Volt point.

My concerns are the safety in case a catastrophic failure of the valve occurs, the less good performance are acceptable to me. If I understand your questions, why are not dual triodes dataaheet more closely and what is ohms law. IF, the manufacture’s recommended AC line voltage for the preamp is, say, Vac and the users house mains voltage is Vac what would the preamp’s power transformer heater secondary winding voltage measure?

His close matching of the last set of tubes I bought from him might work as driver tubes in other audio circuits just fine, but not in an ARC VT50 amp.

Let me try again. I will say he is well known and respected.

TDSL Tube data []

And there is the rub. See my previous posts. As far as sections not matching, let’s check out the variables. With this datawheet the datashedt in imbalance voltage between the two plates was less than 1Vdc. Next, I am not going take sides, to explore operating a 7. How hard did the designer of the preamp drive the recommended tube? 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 Steve Industry Participant Posts: The lower the plate current, the less the cathode is cooled by electrons leaving.

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Slightly different spacing between each turn of wire. In the circuit below is biased by applying a bias voltage to the grid via R2. One matched pair low noise per channel. Again, just for a triode.

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. Whether the reduction in hfr will affect one’s perception will depend upon several factors.

Cheers Steve Logged jea48 Jr. The limit of power that the can dissipate is known as the maximum anode dissipation and it appears on the datasheet. The datasheet also specifies dwtasheet additional, and connected, restrictions for the choice of the bias point.

6922/ECC88/E88CC double triode

At least people who care about good performance don’t like that. Of course he is very careful about the sound of his reference system. Manufacturer’s specs will be conservative. With a constant grid to cathode voltage, if we change the plate to cathode voltage, the plate current will change. Cookies help us provide you a better browsing experience.

I run my tubes in the 11A less than typical plate current. The cathode material may be slightly warped, thus the relationship between each cathode to grid and plate may be slightly different. Unless each section of dtasheet tube is closely matched good luck meeting 7’s requirements. I think I understand the reason why when looking at the VT50 circuit design of the driver tube. By using our site, you consent dxtasheet the use of cookies by us.

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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.

My customer was reviewer Rich Weiner who wrote for Bound for Sound. For their ruggedness I use EH tubes for the input and driver tubes. I guess I just did a poor job of asking what I was trying to find out. ACHiPo on 15 Jan To know the tube life you have to measure the tube S, Ri, mu etcetera Simply perception, which in the end is all that counts.

E55l2 on 28 Jan There is no problem supplying 6. The machine winding the grid wire for each section has tolerances, thus the grid wire for each triode section can and usually is a little different.

Simply reading a “specification” sheet of dataasheet operation does not cover all aspects of operation, since spec sheets only cover very basic operating principles, not exhaustive by any means. I think this equation will help. For the test a Hickok a tube tester was used. Rp is plate resistance of a tube section, datashert, tetrode, pentode etc.

E55l2 on 26 Jan I am not sure where you come up dayasheet the hours, except to say that covers power tubes as well, and is satasheet manufacturer’s warranty. However, over the years I have not keep a time clock on tubes hours.