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Friend
Direct heated triodes as a 45 sound very nice as output tube in a SE design.
But and the direct heated pentodes ? Types as 1G5G, 6A4, 47 do not sound very good when used as SE output tubes ?
Aldovan
Follow Ups:
They Hytron HY69 is a Thoriated Tungsten final a bit like an 807. Pin connections are similar, and their plate ratings are too. Not too nutsy expensive either. Never heard one SE; got no interest in such topologies...heh-heh-heh.
cheers,
Douglas
Friend, I would not hurt thee for the world...but thou art standing where I am about to shoot.
Yes, I am making a amplifier with the brother HY1269 in SE class A.
I have a lot of HY69 and HY1269.
I prefer the HY1269 because the gain is biggest.
Aldovan
813 is also nice. There is also some DH signal pentodes, one like a 12BY7 for instance...and while we're on coated filament types, try a 2E22. There is no big shortage of good DH pentodes.
cheers,
Douglas
Friend, I would not hurt thee for the world...but thou art standing where I am about to shoot.
Douglas
Other two tubes fine for experiments in triode SE class A are the 865 and the 2e25. I have this two and will test in future.
Aldovan
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I have a lot of this 4P1L russian and the chinese 4P1S , I will listen this pentodes, thanks. I have the RL15A, a Tesla Pentode for 25W dissipation and direct heated filament. The problem is the socket, I do not can find in the world...
Aldovan
Aldovan,
I think that is just a 9-pin loctal base. I've used these from Ned, http://www.tubezone.net/9-Pin-Loctal-Ceramic-Chassis-Socket_p_116.html, before for tubes with 9-pin loctals. But I'm not familiar with the RL15A, so it could be different than 9-pin loctal. Interesting tube.
Matt
No, not is a loctal 9 pins socket.
The diameter is big...is a special socket, I need made one...
.
Andy,
I'm so dyslexic it's surprising I know which side of the bed to get up from. But you're right, no matter what I call them they are a nice sounding tube.
Matt
nt
Thanks !
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