#11
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These tubes can output 150W per pair but only in an amp designed for this. Replacing 6550 in an amp like the Premier 11A you will only gain a bit more power and headroom. Probably around 10-15%. You will gain considerably more tube life as they will not be working very hard.
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#12
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As to power, if there's no more energy in (plate current) then there can be no more out. I'm guessing that unless you change the power supply circuit, there's really not much, if any more power out. Depending on the CJ design, maybe they'll give you a bit more.
Unlike most mfgrs., even though it's more expensive, CJ usually over designs the supplies to give plenty of headroom. (ever notice how heavy the equipment is... it ain't them caps) So probably a bit more head room. I need to decide if there is really a sonic benefit significant enough to put up with the strange appearance of the LP140 amps sitting around with the tubes projecting above the top of the chassis. Thanks to everyone here for their experience with the new tubes. Philippe is doing it right, get the ART amps designed with the KT120s to begin with. Last edited by Coppy; 10-29-2011 at 04:59 PM. |
#13
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As long as could find SED I shall not pass on KT120, expensive and furthermore it is really not attractive, too oversized imo...the problem with SED in the USA is a legal problem concerning the brand and its retailer's network, they are always made to St Petersbourg to my knowledge
The German retailers are furnished and I just come to receive from it...
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Philippe l LP12SE,urika phonostage,radikal power supply, dynavector XV-1s,conrad-johnson GAT and LP275M, Sonus Faber Elipsa,yter/naim/Linn cables, vibex, finite elemente |
#14
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Philippe,
Your English is way better than my French (thank you) but I'm confused about your last post. What is the USA problem and are you saying you would not change to the KT120s? Maybe I'm not sure what an SED is. My 6550s are fine with maybe 800 hours on them so no need to replace unless there is an opportunity for really better sound. There are plenty of 6550s available here from CJD and tube retailers when I need them. Bob Last edited by Coppy; 10-29-2011 at 05:10 PM. |
#15
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Quote:
SED Tubes - Vacuum Tubes Manufactured in St Petersburg, Russia PM Components Ltd - World Leaders in Vacuum Tube Supply Tube-Shop.com - Vacuum Tubes for Hi-Fi, Guitar and Radio amplifiers
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Philippe l LP12SE,urika phonostage,radikal power supply, dynavector XV-1s,conrad-johnson GAT and LP275M, Sonus Faber Elipsa,yter/naim/Linn cables, vibex, finite elemente |
#16
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Philippe,
Thanks for the links. Looks like The SEDs are currently available in the US only from the UK distributor. I guess that's okay as long as the tube shop is a reliable firm that stands behind their product. Is it your impression that the SEDs are the best brand of 6550s? I note that the tube store also sells Shuggies (Chinese) that I've heard are good. I guess all this explains why CJ didn't want to replace my 6550s when I had it over there for a circuit upgrade last spring. Also, you would not try the KT120s, is that correct? The amps would surely not be very attractive with those tubes sticking out of them. Bob |
#17
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Hi Bob
Yes we consider in Europe that 6550 winged C made to St Petersburg is the best towards the price, there is a lot of attempt of imitation as far as it exists a confusion enters S logo and C logo, the Svetlana name belongs to New Sensor but not C logo, if the tube carries Svetlana he can be also made to Saratov ( Sovtek, EH ) In the end, we can be on that the current choice of the KT120 is only a qualitative choice? I am not on
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Philippe l LP12SE,urika phonostage,radikal power supply, dynavector XV-1s,conrad-johnson GAT and LP275M, Sonus Faber Elipsa,yter/naim/Linn cables, vibex, finite elemente |
#18
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Philippe l LP12SE,urika phonostage,radikal power supply, dynavector XV-1s,conrad-johnson GAT and LP275M, Sonus Faber Elipsa,yter/naim/Linn cables, vibex, finite elemente |
#19
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Quote:
I'm new to this forum and this is only my second post. I was wondering if you continued to use the KT-120s in your 11A and did you have any problems? I called Ed at conrad-johnson yesterday to ask if it'd be okay to use them but I haven't heard back from him. I've used them in a Pr 140 without any problems but since the 11A is an older model, I wasn't sure if it'd be safe to do so. Your input is appreciated. Thanks, Joe |
#20
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Joe, welcome aboard!
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