It says grid-2 (!) current is 10mA @ 150v on both plate & grid-2 @ 44mA plate current.
If you run it at 20mA plate, g2 current is possibly less than half, maybe less than 5mA.
On the 6ee6p be shure you strictly follow the note on pin 8, which is the shield, found only on the russian only data-sheet:
"Проводящий слой внутренней поверхности баллона (Вывод 8) должен иметь отрицательный потенциал относительно катода. Обрыв цепи Вывод 8, а также приложение положительного относительно катода потенциала к проводящему слою приводят к выходу лампы из строя."
"The conductive layer (=shield) inside the tube (Pin 8) should have a slight negative potential in relation to the cathode. If Pin 8 is left open, or a positive potential in relation to the cathode is applied, it can cause a tube failure."
I used to upgrade the industrial NEM A300SE amplifier, by replacing 6J43P with 6e6p-dru in triode. Instead of the bias by battery in the grid, I selected two zeners for 3,5V at 30mA for cathode bias, and added some shunting to plate power rail capacitor. Effect is very positive and easy listenable. 6e6p tube is very good sounding tube.
I'm just finishing off a 2 stage 300b amp with E180F driver. I have some 6E6P as well I'll be trying. Looks like they can both use the same pinout as long as pin 6 is unconnected. Connect pins 3 and 8 together and use a 220R resistor between pins 7 and 9. Ale Moglia suggests ferrite beads. Anyone using the tube without beads?
hi Andy,
yes, i use 6e6p without beads for years. i think i've had one, that needed a good warm-up (around 10min) to get rid of a hi-freq whistling (not very loud) but i've never felt a need for beads in my application. i tried to switch for e180f, the sound was no big relevation plus the bias was off without mods, so i went back to 6e6p.
yes, i use 6e6p without beads for years. i think i've had one, that needed a good warm-up (around 10min) to get rid of a hi-freq whistling (not very loud) but i've never felt a need for beads in my application. i tried to switch for e180f, the sound was no big relevation plus the bias was off without mods, so i went back to 6e6p.
Could someone (Magz?) clarify how the UF4007 diode and 200R resistor are wired/used on the 6E5P?
IMO, if 6e5p plate voltage is expected to be stable within 5%, good solution is with a zener at cathode. Zeners with 3-7V operation voltages are least noisy. Dynamic resistance of Zener is around order of magnitude less that 200R, and output impedance of stage is better than with unshunted resistor at cathode.
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