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New KT150 tubes?

Has anyone any experience with these pretty new tubes. There are already one or 2 amps I know of, that use them. The review of one of these amps in a UK magazine suggested they were a little warmer and more natural sounding than the nearly new KT120's

The article also suggested they were a straight swap for KT120 based amps, with no adjustment necessary. They are more than twice the cost of KT120's, but still not too costly compared with NOS tubes. I know changing from KT88's or 90's to 120's. did require some amp modification. I have an ARC reference 75 and might want to try the new tubes at some point, ARC don't seem to have a customer E-mail service, to ask the question
david12
wolf_garcia
6,625 posts
 
KT 150s are likely to never appear in a guitar amp, unless somebody thinks they need a very clean unusually high powered guitar amp, which most guitar players don't. I don't think anybody makes a KT120 powered guitar amp, although a tube bass amp might be a good idea for those.

I found that the new-ish version Psvane 12AX7-T II is a great match with 120s...in my Jolida 502 anyway.
xti16
1,525 posts
 
Btselect - My V110 came with a Sovtek 12ax7lps and the drivers are current production Tung Sol. I don't care fgor either of those tubes. Like I said before I did like the KT120's for the first 25 hrs. If you like bandwidth check out the Gec CV6091/A2900 (12at7's).
booboobaer's avatar
booboobaer
62 posts
 
Actually Xtil6 I have about 200 hours and they are still opening up.I have been told by Paul Weitzel that I should give them at least 500 hours to start seing what they can do. This is not unreasonable since I saw the same results with the KT 120.
booboobaer's avatar
booboobaer
62 posts
 
David12, the KT150 tubes had rediculous bloom in mid and bass. But given time that all goes away.
xti16
1,525 posts
 
the KT150 tubes had rediculous bloom in mid and bass. But given time that all goes away.

Funny that would be how I would explain the first 25 hrs with the KT120's. Kind of reminds me of the original Tung Sol 6550 solid black plates with deeper lows. Although the mids of the TS 6550 bp has mids that rival the EL34 sound which I thought was close to the KT120's when new.

Booboobaer - Please post back when they are fully broken in.
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