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 Post subject: KT66 Tubes for Triwatt?
PostPosted: Wed Mar 04, 2009 8:51 am 
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I think the Triwatt was tested for the most part with Golden Dragon KT66 tubes. From what I have read (not 100% certain) the Golden Dragon, the Shuguang & the Valley Art are the same tube just relabled. So I would think the these would all be fine to use in the Triwatt. The same would be true for the Gold Lion KT66

The question are the tubes that seem to be either heavy duty variations on the KT66 such as the JJ KT66, and the tubes that seem to be a rebottled 6L6, such as the Sovtek & Tungsol be OK to use also?

Also has anyone had any feedback on the use of the Sovtek 12AX7-WB preamp tubes. I have few of these from the early 1990s that I will want to try in the Triwatt.

Thanks

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PostPosted: Wed Mar 04, 2009 1:31 pm 
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Anything that will work at a real KT66's load impedance and voltage levels should be fine in this amp. They're not being stressed at all. However, you probably won't get tone that's quite so good with the "re-bottled" 6L6s, so I would tend to recommend real KT66s for tone.

You may also recall these comments from Richard Johnson:
rjgtr wrote:
I like either the Shuguang or JJ KT-66s. I find the Shuguangs like to be biased hot.... I think I used about 75%. They just growl a little better there to me. I read about it in a review of them somewhere and it works.... The JJs are a little purer sounding.

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PostPosted: Wed Mar 04, 2009 8:21 pm 
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I have some Gold Lion "Genalex" KT66 that just arrived today! So you know where I'm going.

Have used Shuguang in JTM45 and yes, bias hot and they do growl nicely. Just ask Brent!

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PostPosted: Mon May 13, 2024 3:56 am 
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heavy-duty variations like the JJ KT66 and rebottled 6L6 tubes such as Sovtek and Tungsol may require further confirmation for compatibility. As for the Sovtek 12AX7-WB preamp tubes, trying them out in the Triwatt could be interesting, but it's helpful to seek feedback from other users first. Retro Bowl


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PostPosted: Tue Aug 27, 2024 7:29 am 
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Gold Lion KT66's are popular & have a good reputation. If you can find them, also Valve Arts KT66's (these are Shuguangs). Good luck. :beer. Anything that will work at a real KT66's load impedance and voltage levels should be fine in this amp. They're not being stressed at all.Mayo Clinic has a nationally and internationally recognized program dedicated to kidney stone treatment and removal. Mayo Clinic doctors treat more than 2048 cupcakes 9,600 people with kidney stones every year.Urine can readily flow from the kidney to the bladder because of the stent's assistance in keeping the ureter open. The cost of Dj Stent Placement in India ranges from a starting cost of ₹30,000 to a maximum price of ₹50,000.


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PostPosted: Wed Feb 26, 2025 4:28 am 
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While many KT66 variants can be interchangeable, the construction differences in heavy-duty tubes like the JJ KT66 could result in varying current draw and biasing needs. Rebottled 6L6 types, such as Block Blast Sovtek and Tung-Sol, tend to have internal structures closer to a standard 6L6GC rather than a true KT66, which could alter the harmonic response and power handling. If you want the classic Triwatt sound, sticking with traditional KT66 types is advisable.


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