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Old 30th January 2017, 10:03 PM   #1
vkung is offline vkung  Canada
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Join Date: May 2005
Location: Vancouver BC Canada
Default TU-8340 review in Kankyu Okoku Vol 83 Winter 2017

Here is the review for TU-8340VK from Kankyu Okoku Vol 83 Winter 2017
管球王国 Vol.83 2017 WINTER (in Japanese)
The translation is in point form

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- Semi-automatic bias adjustment,
- Supports various beam power tubes
- Connections can be switched between UL and triode modes

- The changes in the soundstage when tube rolling are clear to make it reliable for tube evaluation


- L/R independent semi-con active filter is used for high voltage circuit

- Different operation for ECC81/12AT7 of the first stage and second stage, overall NFB

- Guarantees stable different operation amplification for 1-2 stages
using rated current IC.

Sound;
EL34: In UL mode- the soundstage is deep with well controlled decay.
Music is articulate and detailed with a lifelike soundstage. The soundstage has a
dynamic range with more volume available

In Triode mode- there is less volume available- but the sensitivity, bass elasticity of rhythm instruments improves with a more dynamic, richer and more natural soundstage.

6L6GC: 3-dimensional sound stage with a clear, open sound and lower bass.
KT150: Even larger sound stage with very delicate presentation


This model is very reliable even as a tube rolling/tube evaluation machine.

The intention of this project has been fulfilled
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Last edited by vkung; 26th August 2017 at 05:17 AM.
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