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Old 19th May 2011, 04:57 AM   #31
vkung is offline vkung  Canada
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Default TU_879S with RCA 807

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TU-879S with RCA 807
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Old 20th May 2011, 03:38 AM   #32
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Those are TALL! Look forward to your listening impressions.

Is that a 5751 driver with the triple mica?

Cheers
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Old 20th May 2011, 07:15 AM   #33
vkung is offline vkung  Canada
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Stock 12AX7...
This is another sleeper tube. A high-voltage beam tetrode with an ultra-cool plate cap.
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Old 21st June 2011, 04:32 PM   #34
Gobble is offline Gobble  India
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I am interested in this thingie. Are you supplying this kit with a universal 110/230V R-core by Kitamura Kiden?

Thanks
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Old 21st June 2011, 04:38 PM   #35
vkung is offline vkung  Canada
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I only supply original R-core in 120V or 230V from Japan.
Forum Alert !! TU-879S
The universal 120/230V R-core is not from Japan.
Please read this thread from another forum
Elekit TU-879S (SE 6L6GC) Tube Amplifier Kit Build Notes • DIY Audio Projects Forum
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Old 21st June 2011, 04:57 PM   #36
Gobble is offline Gobble  India
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Quote:
Originally Posted by vkung View Post
I only supply original R-core in 120V or 230V from Japan.
Forum Alert !! TU-879S
The universal 120/230V R-core is not from Japan.
Please read this thread from another forum
Elekit TU-879S (SE 6L6GC) Tube Amplifier Kit Build Notes • DIY Audio Projects Forum
Ok. I dont want to put words in my mouth that I be compelled to live by. So is the 230V KK R-Core at the same cost?

Another question - I use Bass-Reflex Fostex 166E speakers with 94db efficiency and 95db sensitivity.

Good enough to drive?

These speakers do not sound warm to my dislike. And there is a bump @80hz. The Tu-879S is said to sound lean.

What tubes do you recommend to add some lower mid-range weight without an upper bass hump? The treble in these speakers is also too recessed for my liking. I would like a tube that gives a more forward and splashy cymbal effect. The recessed treble is just somewhat correctable with a different DAC but not yet there. So I want another gear to "complement" or "shape" the sound a little more on the treble front as well. I think because the signal db levels drop at the frequency extremes of a FR driver, this effect is pronounced. More so with the light cone of the FR being overdamped with a SS GC power amp not having the typical tube amp like low damping factor.

Can the lean sound of this kit be overcome with the right pair of tubes?


Will rolling the 12AX7 as well give any sonic benefits?

Thanks

PS: currently I use a Marantz CD6002 > Nordost Blue Heavens > MyRef GainCLone v1.2 > Fostex B-R bookshelf
--G

Last edited by Gobble; 21st June 2011 at 05:09 PM.
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Old 21st June 2011, 05:05 PM   #37
zman01 is offline zman01  Bangladesh
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Quote:
Originally Posted by Gobble View Post

What tubes do you recommend to add some lower mid-range weight without an upper bass hump? The treble in these speakers is too recessed for my liking. I would like a tube that gives a more forward and splashy cymbal effect.

Can the lean sound of this kit be overcome with the right pair tubes? The recessed treble is just somewhat correctable wit ha different DAC.

Will rolling the 12AX7 as well give any sonic benefits?

Thanks

--G
Gobble,

Have you considered phase plugs for your Fostex FE166E? I've read that it helps for certain drivers, and in my case with the FE166en I noticed more treble (also more focused), and tighter bass.
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Old 21st June 2011, 05:10 PM   #38
Gobble is offline Gobble  India
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Quote:
Originally Posted by zman01 View Post
Gobble,

Have you considered phase plugs for your Fostex FE166E? I've read that it helps for certain drivers, and in my case with the FE166en I noticed more treble (also more focused), and tighter bass.
Will consider those and research again for the 166E.

Thanks Friendly Neighbor!

--G
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Old 21st June 2011, 05:25 PM   #39
zman01 is offline zman01  Bangladesh
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You're welcome .

If you don't mind me asking, which cabinet do you have your FE166E in?
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Old 22nd June 2011, 12:58 AM   #40
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Default More tube rolling

I moved across the USA from New Mexico to Washington DC about three weeks ago, and am temporarily living with my son and his roommates while trying to buy a house. The room I am in is very different than the one I had in Santa Fe, and the neighborhood is pretty noisy. My favoriteTung Sol 6550 and 12ax7 combination sounded a bit anemic in this context, with little opportunity to be sensitive and delicate and all that. My various other tubes are in storage after the move awaiting permanent settlement.

So I tried the combination of Tung Sol KT120 plus Sovtek long plate 12ax7 and I love it in this setting. The KT120s are hard to describe, but full and balanced and extended bass and nice midrange and treble. There is no downside that I can hear (again, this is a fairly noisy setting), and the 12ax7lps drives them well.
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