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Only problem would be socket adapters.\I just found the answer to my dileminamamamamama.
Honest amplification is better than excessive 2nd order distortion anytime.
Edits: 05/02/14Follow Ups:
wasn't the KT-90's VTL's answer, converting the 156 to to a KT 88 base ?
Shuggie makes a version of the EL-156 as well.
Honest amplification is better than excessive 2nd order distortion anytime.
The Chinese EL156 are a poor replacement for the Telefunken tube although somewhat cheaper.The filament current is 1.8 amps vs 1.4amps for the KT88s and the adapters are for changing the pinout and do nothing for the circuit.The bias point will be approx half of what the 88s need and the screen grid is rated for 450v max.The German Telefunken tubes are excellent the Chinese are less so.
Yes but the Chinese ones are cheaper in price and I haven't seen too much junk come out of the Shuggie plant in the last 12 years.Granted,they aren't the Telefunkens but they can give you an idea if your amp responds well to that type of tube.
Honest amplification is better than excessive 2nd order distortion anytime.
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.
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.
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.
I would think the sticker should read "KT-88 to EL-156", not the other way around. I've seen this same thing with adapters meant to convert 7199 amps to 6GH8 input tubes.
To paraphrase Deep Throat in the Watergate investigation, "Follow the electron flow".
Semantic rant over. Carry on.
Tod
You are using an EL156 tube but the socket converts it to a KT88 base so I would the EL156 to KT88 is the right.
Honest amplification is better than excessive 2nd order distortion anytime.
using wire, resistors, etc. so the amp could use EL156 tubes, I'd be modifying the circuit of the amp. My perspective is that's what the adapter does. It changes the amp's circuit, except it does it temporarily, which is a good thing.
You're seeing it as modifying the tube. Which I suppose is just as correct.
Like I said, it's semantics. At the price of those EL-156, I'm never going to need one of those adapters, not for my MKIII's!
I have used these in a Jadis JA80 using Telefunken EL156 tubes.Once the bias resistors were adjusted the amp was somewhat improved over the KT88 tubes,expensive though.
If the ad in the previous thread is the standard/these days. EL 156s are Expensive indeed!!
Steve
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