New Sensor (Mike Mathews - EH, Sovtek, et.al) has bought the rights to the Svetlana name in the USA. All current "Svetlana" tubes are from the same reflector factory in Moscow as the others.
Tubes, different makers, different types...but what are your preferences?
- Thread starter DaveyF
- Start date
the input tubes were Ei tubes Yugoslavia, they also build 6550 tubes.
You cannot see which brand on the pictures on the homepage
Sablon how did that CJ amp bias? Autobias, individual tube bias or pair/quad biasing. Very interesting idea about blending tubes, a way to stretch out those Tung Sols.
andromedaaudio I am not away of anyone else making a KT120 although I’m sure someone in China is making them. As a side note, the best tube I ever had in my Rogue amp was the Treasure KT120 from China that I got from Rachel at Grant Fidelity about 5 years ago. But two of the first quad could not hold steady bias after about two months. Rachel replaced the quad and they played awesome until another tube became unstable.Then another. I took them out and gave up and put in a quad of something else. The tube was discontinued shortly afterward.
The Tung Sol reissue is very reliable, powerful sounding tube with good bass. But too me it is just too dry in the midrange, lacking bloom and dimensionality. Kind of like solid state.
Anyway, if you can use KT88 or 6550 there are lots of choices. You have a great amp worthy of GE 6550 or EI KT 90 or Sed Wing C 6550, all NOS these days. Otherwise I would say Gold Lion KT88 or Preferred Series KT 88 which is the latest version of the Penta Labs KT88SC. Can you use KT66? The Gold Lion KT66 is a very good tube.
CJ amplifiers have individual bias. However if we mix tube types we must take in attention that sometimes the power tube filaments are in series in groups of two - we should not put two tubes with different filament current in series.
That makes sense. i think individual tube bias is a great feature on tube amps that is often overlooked. Almost an essential feature if you want to run NOS output tubes as finding matched sets is virtually impossible these days.
My amp started out life as an 88, sent it back to Rogue to convert to 90, and later had my local tech upgrade the caps to VCaps and many resistors to Vishay. The amp improved with each change. The individual tube bias allows me to run my GEC KT66, EI KT90, Mullard EL34 and RCA 6L6GC black plates. Your right about the service from Mark, one of the good guys in audio.
Thumbs up for Rogue Audio!
One of the saddest encounters I had ‘in the bizz’ was meeting the colossus ( in more ways than one) of management Peter Grant. A true managerial giant and Zeppelin would not have been the same without him.
Sadly the drugs had taken their enormous toll and he was a mere shadow of the man who reinvented touring percentages for performers versus promoters. Long may he RIP. He certainly made my life easier when it came to negotiating concert fees and I was pretty hot at it if I do say so myself
Sadly the drugs had taken their enormous toll and he was a mere shadow of the man who reinvented touring percentages for performers versus promoters. Long may he RIP. He certainly made my life easier when it came to negotiating concert fees and I was pretty hot at it if I do say so myself
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