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RE: That could be because most of those are based on hefty sweep tubes.

50.138.36.140

In Reply to: RE: That could be because most of those are based on hefty sweep tubes. posted by Michael Samra on May 02, 2014 at 18:35:40

I built a se amp using the Chinese EL156 running the plates and screen grids at 400v and 60 ma as quasi triodes.I started off with 8 EL156 tubes and run the amp two or three hours a day,more on weekends,and after 5 months all but three tubes had developed screen grid shorts and the last two I changed are making the arcing sounds of a tube about to die.Using KT88s the amp plays without problem for months on end making me question quality control of the Shuggie plant.I can understand one or possibly two out of eight having problems but cannot recommend these tubes as the 88s sound at least as good.

Follow Ups:

RE: That could be because most of those are based on hefty sweep tubes. - TubeAcolyte 18:41:39 05/05/14 (0)
Thanks for the tip! I've been wondering about the performance and quality of the Shuggie EL156. There hasn't been much word up until now on the consistency of these tubes. It's a shame they're substandard :(
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May your tubes be lively and long-lasting. Holy be thy heater.
RE: That could be because most of those are based on hefty sweep tubes. - Michael Samra 11:23:37 05/03/14 (0)
The Shuggie KT88s are great however,the EL156 they don't make very many of to perfect the quality of them.I think if they made more of them,I'm sure quality would be better.Those may even be old stock production they are selling.

Honest amplification is better than excessive 2nd order distortion anytime.

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