KT66 amp tubes in action!!!
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Uploader Comments (ufonaut)
All Comments (32)
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are kt66 interchangeable with 6l6s iv seen pic of 2 6l6s and kt66s in a 5150. the only thing iv heard that could be a problem is heater current.
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whoa bro!! your tubes are red plating!
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Its been a while since I have seen a tube light up like that
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search "emitron KT66" on ebay. theres a RARE MINT NOS 1950's pair
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Oh man I envy that sound but isn´t that a Bryan Adams riff? Let´s just hope he stole it from AC/DC :) No disrespect to mr Adams but he seems more like a Vox-guy to me. Vox rock in their own kind of way.
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The 6L6GC
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Whats the American abreviation for KT66?
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exactly. you can run those plate voltages just lower the screens. =[ they're like dying.
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kt88's work well with 525 volts and about 60 ma.Kt66 is best around 450 with 40 to 45 ma.
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in that video marshall sound like peavey
acdc126 4 years ago
Hi, the clip was filmed with a tiny digital camera, and because it was in the house, the amp was very heavily attenuated, so the tone is squashed away to almost nothing. Believe me, the amp in person at a good volume sounded nothing like that!!! It had SS rectifiers, the original set of 6 diodes IIRC. I sold it a long time ago.
ufonaut 4 years ago
575volts on plate!? its very high! is it with 2 gz34? or diodes rectifier... im near to end my project to make my own jtm45/100 with a peavey vtm120, everything is modded i just have to finish the power supply and fix transformers. my toroid PT give 360v, its 10 more than the marshall, i dont think it can go to 575vdc. my peavey 380vac gives less than 530dc
acdc126 4 years ago
I should also have said that your JTM45/100 will work fine on a lower voltage B+, but it will not sound like an original. Lower B+ gives a softer, fuzzier tone, whereas the 575V produces a hard, clean-ish sound with plenty of compression but not fizzy. Think "Wing Cries Mary" or "Hey Joe".
ufonaut 4 years ago
Buddy, you gotta watch the KT66, very unforgiving tube. They shouldnt light up like that when your playing. Somthing is wrong with your biasing and it wont last long if your playing all with it on ten...ask me how I know.
AmpegV4 5 years ago
Hi, biasing these things is a real compromise - set up how it was on the clip, cleans sounded a tiny bit weak and gritty yet the grids were running red like that. Luckily those were GEC KT66's, which could take that "abuse". I sold the amp a few months ago. Note that you can just see the RS De Luxe power transformer at the left of the picture, this was a real early JTM100.
ufonaut 5 years ago