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.
|Published (Last):||17 December 2009|
|PDF File Size:||4.71 Mb|
|ePub File Size:||8.64 Mb|
|Price:||Free* [*Free Regsitration Required]|
FullRangeMan on 26 Jan You can’t set the two plate voltages of each tube individually. It seems with that information it would be pretty easy to figure out what I’m giving up in performance by running the heater voltage below its designed level. 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.
RCA have a special range of tubes, the “red base”. Could ratasheet please explain why? So I have trouble believing your information. What do you or those costumers mean with tube life? Steve on 27 Jan If we keep the plate to cathode voltage constant, and alter the grid to cathode voltage, the plate current will change.
That’s why I asked is Ohms Law was at play. If we keep the plate current constant, altering the grid to cathode voltage will cause the plate to cathode voltage to change. These tubes were also bought as closely matched datasheeh noise tubes from well respected tube vendors.
OPERATING POINT LIMITATIONS
Steve on 28 Dxtasheet For general public, consider evaporation of water cools the remaining daatasheet of water. See numbers 4 and 5 for setting the input and driver tubes plate voltage on the PDF Link provided. However, there are extenuating circumstances involving heavy plate current and increased frequencies into the high MHz, and depending upon the tube, in which transit time becomes a problem. By the way, Telefunken was known for gettinghours on their 12ax7 “family” under typical conditions.
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. The plate structure between sections may be sheped slightly different.
Exceeding the Va and Va b limits usually results in destruction of the tube. With this tube the difference in imbalance voltage between the two plates was less than 1Vdc.
@ The Valve Museum
One matched pair low noise per channel. A few reasons why two sections inside of one envelope will cause the two sections to measure differently. So it is better not to use 6v but a little higher. Rp is the change in plate to cathode voltage with a change in plate current,, with a constant grid to cathode voltage.
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. E55l2 on 26 Jan You can read some reviews of one of my poor designs here. I take that as a given when dealing with a well known and well respected tube vendor. The plate structure may not be placed exactly the same in relation to the cathode and grid.
Nope that’s not what I was attempting to ask. I datasheey say he is well known and respected. Normally one thinks of resistance as being voltage divided by current equals resistance.
AC Datashret, no worries here. Grid Bias Voltage In the circuit below is biased by applying a bias voltage to the grid via R2. The ‘s anode dissipation limit is 1. 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.
At datasheeg filament voltage, the carbonates evaporate less, so grid contamination is less over time, a plus. If the filament or cathode is operated continuously with a higher voltage than that recommended, some of the coating material is evaporated and permanently lost, thus reducing the life of the valve.
6922/ECC88/E88CC double triode
Cheers Steve Logged jea48 Jr. I have bought from him before.
Section 1section 2 No way this tube could be biased in the VT50 as a driver tube let alone an input tube.