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EL156 [message #9889] Fri, 12 January 2007 09:18 Go to next message
Steve  is currently offline Steve
Messages: 83
Registered: May 2009
Viscount
I was wondering if anyone has used or heard much about the EL156 tube?
Re: EL156 [message #9892 is a reply to message #9889 ] Mon, 15 January 2007 12:17 Go to previous messageGo to next message
Poindexter  is currently offline Poindexter
Messages: 108
Registered: May 2009
Viscount
I went and looked it up; that bugger is some linear in triode!

You have these? Where in the world are you going to find sockets for them?

Aloha,

Poinz

Octal [message #9893 is a reply to message #9892 ] Mon, 15 January 2007 15:36 Go to previous messageGo to next message
PakProtector  is currently offline PakProtector
Messages: 957
Registered: May 2009
Illuminati (2nd Degree)
hey Poinz,
The new production is octal. Reportedly it is made by the same folks who did the later production for the European market. What I like is the KT90-big 50Watt plate dissipation. If I weren't getting such good results from Thoriated Tungsten, I would have long since gotten a few quads ov them...Smile

6k6 a-a, 400V B+, 30% U-L, and 125 mA idle ought to make one sweet amp!
cheers,
Douglas
Re: Octal [message #9899 is a reply to message #9893 ] Wed, 24 January 2007 22:54 Go to previous messageGo to next message
ttan98  is currently offline ttan98
Messages: 35
Registered: May 2009
Baron
This tube is pin compatible with KT88 and "can" replace KT88 but it has higher plate dissipation, hence gives more power.

It was first made by Telefunken as a substitute for KT88, now you buy it from China.

Just like KT88 you can wire it as KT88 in triode mode however it will give you more power.
Re: Octal [message #9908 is a reply to message #9899 ] Wed, 07 February 2007 12:11 Go to previous messageGo to next message
Francois G  is currently offline Francois G
Messages: 4
Registered: May 2009
Location: Mid-Illinois
Esquire
Could anyone help with a specific place to buy Chinese EL156 tubes. My search came up empty. Thanks.
Re: Octal [message #9909 is a reply to message #9908 ] Wed, 07 February 2007 12:39 Go to previous messageGo to next message
Wayne Parham  is currently offline Wayne Parham
Messages: 17032
Registered: May 2009
Illuminati (33rd Degree)

You might ping Aki at BOIAudioworks and see if he's got 'em.


Re: Octal [message #9912 is a reply to message #9908 ] Sun, 11 February 2007 21:08 Go to previous messageGo to next message
Norris Wilson  is currently offline Norris Wilson
Messages: 361
Registered: May 2009
Grand Master
If Bio Works does not have them. You can buy them from a dealer in China:

www.supertnt.com


destruction test on el156 [message #9934 is a reply to message #9899 ] Tue, 20 March 2007 16:15 Go to previous messageGo to next message
Steve  is currently offline Steve
Messages: 83
Registered: May 2009
Viscount
I performed a destruction test (class A) of the chinese version by setting up one to dissapate 60 watts and the plate didn't turn cherry. I also disconnected the plate and checked the screen dissapation, approximately 22 watts. The screen, of course, turned cherry, but no arc over and continued to run for 30 minutes or more. I also upped it to nearly 30 watts for a couple of minutes, and the screen turned bright yellow, but again didn't arc. Pretty rugged I would say.

One thing I don't fully understand is that although the u is 22 VS 8 for a KT88, and both have similar Gm specs (telefunken data), the triode curves for both are near identical. For approx 100ma, both take 100 volts at zero bias. This should not be. Any thoughts?
Re: destruction test on el156 [message #10011 is a reply to message #9934 ] Wed, 07 November 2007 18:57 Go to previous messageGo to next message
PakProtector  is currently offline PakProtector
Messages: 957
Registered: May 2009
Illuminati (2nd Degree)
hey-Hey!!!,
I had to smile at your screen wattage testing. I once ran 85W through the g2 of a 4E27 I was testing when I forgot to put B+ on the anode. It survived OK...Smile

As to the differences, which data are the 100V/100 mA data comming from? I assume your measurements? I can't offer anything concrete, but a good sounding power pentode with a 60W plate is not going to get a very close look from me under most circumstances, eh?
cheers,
Douglas
Re: EL156 [message #61680 is a reply to message #9892 ] Wed, 06 January 2010 20:23 Go to previous messageGo to previous message
SASAudioLabs  is currently offline SASAudioLabs
Messages: 17
Registered: May 2009
Chancellor
I designed and built PP ultra-linear 50 watt monoblocks and it does sound quite spectacular. Very transparent with great dimension, depth, width, dynamics, nice tonal response.

A keeper for sure.

Cheers.
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