See https://www.youtube.com/watch?v=OiXAIz0EI48&t=50s I use these with Magnepan 0.7s with DWM bass panels. An 833A is more than powerful enough to make Magnepans too loud but the 833A has a very rich sound. You only need 1000 Volts on the plate with the grid through 600 Ohms of headphone amplifier transformer connected between the grid and the same ground as one of the terminals of the cathode heater putting the grid at zero voltage bias. The cathodes need very pure DC; 9 to 10 Volts at 10 Amps so the best way to begin is to use a couple of car batteries and about 0.4 Ohm dropping resistors. If you build a complete amplifier, a 46 SET with a Lundahl LL2756 output transformer for 5k to the plate of the 45 and 600 Ohms to drive the 833A you will have an ideal amplifier for under $2000 in retail cost parts. Let me know if you want help building such a project so you can know it will work.
Tubes for Magnepan’s.
I think next up on my acquisition list is a tube amplifier. I'm not looking for the be all end all, cause I don’t think there is a definitive "Best", so am looking for as good as I can get for $3-4k.
Because tubes drive speakers so much more efficiently than solid state I am only looking for 40-50 watts to drive my modded Maggie’s, 1.7i's. (Or what you have when you add a new crossover and planer tweeters to 1.7i's.) Maybe 2.7x? I haven’t settled on that yet. And I have some Zu Dirty Weekend's upgraded to the max coming in in 2 months to replace my KEF's.
Anyway, I haven’t had a tube device since my Halicrafter short wave radio, and reviews are not the same as advice from people that own something. There is a Rouge Audio dealer in my area, last I looked, (opps, they no longer carry them), so I may have to go to another market to hear something, or get a try before you buy from a manufacturer or dealer.
You folks have taught me a lot, and I think asking users is the right thing to do on this change in direction.
Thanks in advance.
Because tubes drive speakers so much more efficiently than solid state I am only looking for 40-50 watts to drive my modded Maggie’s, 1.7i's. (Or what you have when you add a new crossover and planer tweeters to 1.7i's.) Maybe 2.7x? I haven’t settled on that yet. And I have some Zu Dirty Weekend's upgraded to the max coming in in 2 months to replace my KEF's.
Anyway, I haven’t had a tube device since my Halicrafter short wave radio, and reviews are not the same as advice from people that own something. There is a Rouge Audio dealer in my area, last I looked, (opps, they no longer carry them), so I may have to go to another market to hear something, or get a try before you buy from a manufacturer or dealer.
You folks have taught me a lot, and I think asking users is the right thing to do on this change in direction.
Thanks in advance.