Here are some curves of this great valve I traced time ago, hope these are useful when designing a stage with them.
Unfortunately the variance of the valve’s parameters is all over the place. Hence you should use these curves as reference and not as sacred data. Luckily, I have plenty of them and can match/select pairs as needed.
Thanks!
They look great. My favourite 6E5P has a worthy contender. Any comments about how they compare?
Hi Lars
Both are great valves in my opinion. I used the 6e5p in a SPUD amp, loved it. When I tried them both as preamp / driver valves, I found the 6-e6p-dr a bit more dynamic and detailed. In particular I have a few of the 6E6P-DRY (DRU) which were built with tighter parameters and reliability due to their military use. I’m not an expert on them so cannot comment further.
I posted on my blog a few entries about both valves over the years and their use in headphone amps, SPUD amps and drivers. Have a look around.
I personally feel you can’t go wrong with any of the two valves.
Cheers
Ale
Hi Ale,
Thank you for posting those curves and spice model for 6E6P-DR. In the region of my interest, which is Ia=16mA, Va-k= ~163v, Vk=3v, the curves for 6E5P are quite close…may warrant breadboarding to test.
Best, Robert
Lars, 6E5P service life guarantee 500 hr, 6E6P – 10000 hr.
The 6E5P datasheet says 5000 hours service life guarantee, not 500 h.
I guess that was a typo in Charms comment.
Thanks for the update.
I just realised URLs below weren’t updated properly, doh!
Here is the datasheet translated for reference if anyone lands on this blog post: datasheet
The curves of the 6E6P-DR look very promising. However, I wonder whether the tube (as a triode) can withstand voltages above 150V or higher than 285V at Ia 300V to 500V including Ra)?
Thanks for your Blog! Always inspiring!
Hello Reinhold,
Thanks for the feedback, much appreciated. I love your analogue prints, wow amazing art. Very inspiring.
The 6e6P-dr can do 285V at quiescent anode voltage when triode strapped. See datasheet: datasheet
No need to go higher than 200V, you can get over 230Vpp with a great performance at 190V/20mA (230Vpp 0.3% THD), see here: Driving hard
cheers, Ale