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    KT150 - Has Anyone Tried These Tubes ?

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    arledgsc

    Posts : 330
    Join date : 2012-11-30
    Location : SF Bay CA

    KT150 - Has Anyone Tried These Tubes ?

    Post by arledgsc on Sat Aug 15, 2015 11:28 am

    I was reading about the Audio Research GS150 amp ($25,000) designed around the Tung Sol KT150 vacuum tube.  Audio Research states that if customers are thinking about upgrading to the install KT150s in their KT120 based amps to get a indication of the KT150 sound.  So I have to ask... has anyone tried KT150s in a Latino amplifier?  If so what did you think?

    sKiZo

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    Join date : 2013-04-01
    Location : Michigan USA

    Re: KT150 - Has Anyone Tried These Tubes ?

    Post by sKiZo on Sat Aug 15, 2015 1:11 pm

    Would they even FIT in a stock dynaco chassis?

    No problem here with a custom case, but I'm not up to spending twice what I paid for the KT120's unless I could expect an appreciable gain in power as well. Can't happen without seriously significant circuit mods. The KT120's give me about a 10% boost over KT88's, and I'd expect the same from the KT150's in an ST120.

    The driver tubes are what most influence what you hear anyway. I'd put my money into those ... in fact, I have ...

    Box One of Two



    PS ... I've already got three tube sets for the Eico HF12A I picked up a couple weeks back. I think I may have a problem here ... Hi, my name is sKiZo, and I'm a tube-aholic ...

    ***

    Looking forward to hearing from any real world mad scientists with deep pockets who've made the investment.

    deepee99

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    Location : Wallace, Idaho

    Re: KT150 - Has Anyone Tried These Tubes ?

    Post by deepee99 on Sat Aug 15, 2015 1:47 pm

    I would (with deep regrets) concur with Skiz on this.
    To put it into motor-head phraseology, power tubes are the pistons, but driver tubes are the carburettors. The drivers provide the right fuel-oxygen mix.

    denny9167

    Posts : 152
    Join date : 2011-05-09
    Age : 49
    Location : Texas

    Re: KT150 - Has Anyone Tried These Tubes ?

    Post by denny9167 on Sat Aug 15, 2015 4:50 pm

    David Hafler said the 6AN8 drove a parallel arrangement of KT88's very easily!! KT-120's singles would be no problem! not sure about KT-150's,maybe?

    corndog71

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    Location : It can get windy here

    Re: KT150 - Has Anyone Tried These Tubes ?

    Post by corndog71 on Sat Aug 15, 2015 6:24 pm

    I've considered the KT150 tubes but they really need appropriate transformers to get the best performance out of them.

    deepee99

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    Location : Wallace, Idaho

    Re: KT-150s

    Post by deepee99 on Sat Aug 15, 2015 7:50 pm

    Nobody on this forum has commented on their purchase/performance of KT-150s. If we, who are amply crazy, haven't bothered with them, one wonders where their market must be. I'd be delighted to try an octet of them at someone else's expense. But for the money, I will continue to try corner the market on New Jersey 6550s.

    sKiZo

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    Re: KT150 - Has Anyone Tried These Tubes ?

    Post by sKiZo on Sat Aug 15, 2015 8:28 pm

    Has anyone actually come out with an amp that can get the full monty from these things? I see a few that come with them, or recommend installing them, but those are basically equipped with bigger iron to drive them, but nowhere near the power out the tubes should be able to supply according to the specs.

    Bring more of a bling thing if anything ... ring a ding ding.

    This has come up in the past, and I do seem to remember Bob saying the iron can handle them, but not to expect any increase over what the KT120 can do in these amps. Only reviews I can find do tend to say the KT150 does have more of a punch at the bottom than a KT120, but few head to head comparisons, so take that for what it's worth. Same is said of the KT120 over a KT88, but that again depends on what brands you're comparing. Personally, methinks those who rave about the KT150 may just be trying to justify the expense, but ... take that for what it's worth as well. clown

    denny9167

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    Re: KT150 - Has Anyone Tried These Tubes ?

    Post by denny9167 on Sun Aug 16, 2015 10:47 am

    The only product I've seen 150's in that stands out to me is Audio Research, in their new series of products, would like to see the guts of one of these amps, ex: driver circuit, transformers etc. the 120's were a big step-up, not sure about how much of a step the 150's are. May have to make a trip to Audio Concepts in Dallas to check those out, that's if they have one of the newer ARC amps.

    arledgsc

    Posts : 330
    Join date : 2012-11-30
    Location : SF Bay CA

    Re: KT150 - Has Anyone Tried These Tubes ?

    Post by arledgsc on Sun Aug 16, 2015 12:05 pm

    sKiZo wrote:Has anyone actually come out with an amp that can get the full monty from these things? I see a few that come with them, or recommend installing them, but those are basically equipped with bigger iron to drive them, but nowhere near the power out the tubes should be able to supply according to the specs.

    The Audio Research GS150 does it appears. 150W per ch. using two KT150s in push-pull.

    10-E-C

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    Location : upper east tn

    Re: KT150 - Has Anyone Tried These Tubes ?

    Post by 10-E-C on Sun Aug 16, 2015 12:06 pm

    arledgsc wrote:
    sKiZo wrote:Has anyone actually come out with an amp that can get the full monty from these things? I see a few that come with them, or recommend installing them, but those are basically equipped with bigger iron to drive them, but nowhere near the power out the tubes should be able to supply according to the specs.

    The Audio Research GS150 does it appears.  150W per ch. using two KT150s in push-pull.  


    At what price are they?

    deepee99

    Posts : 1260
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    Location : Wallace, Idaho

    Re: KT150 - Has Anyone Tried These Tubes ?

    Post by deepee99 on Sun Aug 16, 2015 12:14 pm

    10-E-C wrote:
    arledgsc wrote:
    sKiZo wrote:Has anyone actually come out with an amp that can get the full monty from these things? I see a few that come with them, or recommend installing them, but those are basically equipped with bigger iron to drive them, but nowhere near the power out the tubes should be able to supply according to the specs.

    The Audio Research GS150 does it appears.  150W per ch. using two KT150s in push-pull.  


    At what price are they?

    25 kilobucks.

    10-E-C

    Posts : 75
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    Age : 62
    Location : upper east tn

    Re: KT150 - Has Anyone Tried These Tubes ?

    Post by 10-E-C on Sun Aug 16, 2015 12:22 pm

    deepee99 wrote:
    10-E-C wrote:
    arledgsc wrote:
    sKiZo wrote:Has anyone actually come out with an amp that can get the full monty from these things? I see a few that come with them, or recommend installing them, but those are basically equipped with bigger iron to drive them, but nowhere near the power out the tubes should be able to supply according to the specs.

    The Audio Research GS150 does it appears.  150W per ch. using two KT150s in push-pull.  


    At what price are they?

    25 kilobucks.

    Dang, I'd have to dig a lot of ginseng this fall to cover that!

    skriefal

    Posts : 116
    Join date : 2011-09-20
    Location : Utah, USA

    Re: KT150 - Has Anyone Tried These Tubes ?

    Post by skriefal on Sun Aug 16, 2015 4:59 pm

    arledgsc wrote:The Audio Research GS150 does it appears.  150W per ch. using two KT150s in push-pull.  

    I bet those tubes need to be replaced frequently!

    Bob Latino
    Admin

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    Re: KT150 - Has Anyone Tried These Tubes ?

    Post by Bob Latino on Mon Aug 17, 2015 7:00 am

    You can use the Tung-Sol KT150 output tubes in either the VTA ST-120 or the M-125 monoblocks as long as you bias them "as a KT88". The KT150's can take much higher plate voltages and bias current than either amp can provide. I have had a few customers use them in either of the above mentioned amps. The downside to these tubes is that they are expensive. Below is a link to one of our forum posts with photos of the KT150's being used in a pair of M-125's.

    KT150 output tubes in VTA M-125 monoblocks

    Bob

    GP49

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    Re: KT150 - Has Anyone Tried These Tubes ?

    Post by GP49 on Mon Aug 17, 2015 2:31 pm

    If reliability and long life come with the high cost, perhaps they would be a viable option.

    But then, I don't roll tubes. Mine generally stay put. They get covered with dust and I blow them off a couple of times a year, maybe, when I check bias.

    bluemeanies

    Posts : 119
    Join date : 2015-02-09
    Age : 66
    Location : Folsom Pa.

    Re: KT150 - Has Anyone Tried These Tubes ?

    Post by bluemeanies on Mon Aug 17, 2015 6:54 pm

    They are sexy...but the price makes me limp. The KT 88's make my day. I will never say never but I am still in awe with the performance of my 804's using only 35 watts per channel in triode mode.

    MarcVBelgium

    Posts : 81
    Join date : 2013-12-06
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    Location : Antwerp, BELGIUM

    kt150-has-anyone-tried-these-tubes

    Post by MarcVBelgium on Sat Aug 22, 2015 2:47 pm

    Dear all,

    I have no experience with KT150, but in the case of Audio Research, these are the European prices
    for upgrades....from standard (KT-120) to "SE" (KT-150) as offered by the Dutch distributor

    REF 75 to REF 75 SE € 2.990

    REF 150 to REF 150 SE € 5.390

    REF 250 to REF 250 SE € 4.890 each

    1 € is about 1.10 $.......these are only UPGRADES from the existing and very expensive "standard" AR amps.....

    Then consider the price of a Dynaco ST-120......

    I think we are all very "wise" men.....even the "tube-aholics" among us....



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