hey-Hey!!!,
With a significant part of the g1 plate curves above its plate dissipation, I'd want to run it at lower g2 voltages. beyond that, it looks like a fine audio tube. If you've got a linestage with balanced output a *VERY* simple amp can be built with just a two-tube, PP power stage. Looks like an easy 6-8W to mee... wishing I had several of them myself.
cheers,
Douglas
With a significant part of the g1 plate curves above its plate dissipation, I'd want to run it at lower g2 voltages. beyond that, it looks like a fine audio tube. If you've got a linestage with balanced output a *VERY* simple amp can be built with just a two-tube, PP power stage. Looks like an easy 6-8W to mee... wishing I had several of them myself.
cheers,
Douglas
The 8608 is an E55L / 8233 with plate caps .
http://www.diyaudio.com/forums/showthread.php?t=25479
Regards , Alexander .
http://www.diyaudio.com/forums/showthread.php?t=25479
Regards , Alexander .
:Well I was thinking about using it as a driver for a 813.
I know it's probably a bit over the top but I think it would look cool to have a ll the tube have plate caps.
Oh and ya my linestage does have balanced outputs too LOL, how'd you know
Nick
hey-Hey!!!,
813 driver sounds cool... I am driving mine with a 6H6Pi/FQP1N60 cascode. Let me suggest for you E-Linear at 20-25%, B+ of ~600 to plate and screen( the 813's ), and an 8k a-a load. 8608 g2 around 75V, with plate loads of 15-20k and idle current 15-20 mA per.
Or you could build a 'scope and use them for horizontal outputs.
cheers,
Douglas
I was going for 1kv on the plate of the 813 and running 6500 ohm plate load.
The idea has been in the works for a while it's just changing the driver tube is something new.
Oh this is a se amp though, not a push pull. I was toying with that idea a while back just didn't have the room LOL.
Nick
The idea has been in the works for a while it's just changing the driver tube is something new.
Oh this is a se amp though, not a push pull. I was toying with that idea a while back just didn't have the room LOL.
Nick
Gyrator loaded, I've never heard of that one. But then again there's a lot in this obsession I haven't learned yet.
Here is the basic version that I used several years ago in a mic pre:
Here is another version Hearinspace implemented in his high-end amp:
http://wavebourn.com/forum/download.php?id=125&f=7
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Hey Douglas,
Did you try a 813 at a 40% ul tap? If yes how did it work?
Or is 20% the only way to go?
Thanks,
Nick
hey-Hey!!!,
It worked very well, save for making about half the power. The low B+, minus 40% of the plate swing lowers the g1=0V line too far so swing w/o grid current is small. At 30% the envelope to work under is far larger, and I suspect 20% might just be better...soon enough, eh?
cheers,
Douglas
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