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Old 23rd March 2020, 02:39 AM   #81
vkung is offline vkung  Canada
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Join Date: May 2005
Location: Vancouver BC Canada
Hi Victor,

I have installed the opts in the TU-8800 and listened to them couple days. Assemble is quite straight forward and I put a thin layer of sorbothane between their bottom and the rack.

It's a huge improvement from the stock opts, like day and night. The stocks ones sound good but kind of muddy & a bit slow; the new ones really improve the clarity, smoothness and response. Overall, they are a must upgrade for this amp. I attached some photos for you.

I have tried a few different tube combinations, so far I like the combination of 5932 and ECC801S the most.

Btw, how is Vancouver, Toronto is essentially stopped and nearly everyone stay home. Hope you and family healthy and safe.

Eryn

Click the image to open in full size.

Click the image to open in full size.
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Old 28th March 2020, 08:33 PM   #82
vkung is offline vkung  Canada
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Glenn's Amp
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Old 28th March 2020, 08:39 PM   #83
gpdavis2 is offline gpdavis2  United States
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Join Date: Aug 2004
Location: NJ Shore
Quote:
Originally Posted by vkung View Post


Glenn's Amp
I wish. Obviously a different Glenn. Very nice.
__________________
Glenn...
Canton Ref 9K Cary SLP-98P & Rocket 88 Denon DP-80 w/Lyra Kleos, Ortofon Cdza Blk & K-b, AT33R Elekit TU-8500 Oppo 203 Sony ST-J75 Stax UA-7/CF
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Old 29th March 2020, 02:00 AM   #84
vkung is offline vkung  Canada
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I finished this amp late last night..
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Old 5th April 2020, 02:16 PM   #85
vkung is offline vkung  Canada
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Feed back from Stephen
Just had some critical listening over Saturday and a quick report. Definitely improvement in every aspect. Most important is much better microdetails, leading to improved sound stage. Tone is good. Initially I worried about being to "Hifi", which turns out not the case. Many DIYer would not think the upgrade is cheap but transformers are expensive to manufacter. If people are willing to pay 100 for a cap, then the transformer is not expensive.
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Old 6th April 2020, 06:11 AM   #86
carlj11 is offline carlj11
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Join Date: Dec 2019
Hi Victor,

Nice touch with the wire wrap on the transformer cables. Looks like some kind of Techflex(?) cable sleeving (not that I knew what that was until looking it up), and what diameter?

In any event, I'm looking forward to wiring up the new transformers.

Thanks,

Carl
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Old 6th April 2020, 02:16 PM   #87
vkung is offline vkung  Canada
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I will ask for you
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Old 9th April 2020, 02:33 AM   #88
vkung is offline vkung  Canada
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Join Date: May 2005
Location: Vancouver BC Canada
These are the links to build TU-8800 from spacibar Youtube Kanal

PART 1

PART 2

PART 3
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Old 10th April 2020, 09:08 PM   #89
NewToTube is offline NewToTube
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Join Date: Apr 2020
Default Tu-8600 build

The last kit that I built was at age 13, and it was a low power Heathkit mono amplifier. Ever since I had wanted to repeat the experience, and at age 43, I decided to do it.

In the last two years, I had become interested in "Hi-fi." It started when my 11 year old son said to me, "Dad, why don't you like music?"

"But I like music!" I remarked. And then, to myself, lamented "who have I become..."

To rectify the problem went out and purchased an Outlaw Audio solid state amp, a pair of KEF LS50 speakers, and later a turntable and pre-amp. This of course started a new hobby, a new interest.

For a year I considered the Tu-8600... and then pulled the trigger, thus linking my long time interest in a repeated electronic build and renewed interest in music.

What a great choice of a kit. The build quality is unassailable. I took my time, moved my way through the exceptionally clear instructions, double checking along the way. It was a great diversion, fantastically fun to build.

My son and I excitedly moved through final assembly. We lugged the completed amp from the basement to my office upstairs, connected it to the LS50s, and then plugged it into the wall. The three central tubes sparked to life ... and then... NOTHING! Rather than a disappointment, this was just another step in the journey... I really had not expected it to work the first time out. The drama of the whole thing was really fantastic!

I sent a note to Victor from VK Audio, who had guided me though the purchase, including the upgraded capacitors, transformers, etc. He called me immediately, and guided me through the troubleshooting process. For the next 14 hours I assembled, reassembled, adjusted, and checked voltages. Finally, with Victor's guidance, I discovered that I had mistakenly interchanged the same pair of resistors on both channels.

My son and I re-assembled for the unit for third time and took it again to my study. Drama again! We looked at each other and flipped the power switch. The three central tubes sparked to life again, and then after seconds that seem like hours, the big 300Bs came to life. My son adjusted the volume, and his eyes light up (as do mine) as music flows through the room. What a great experience!

Now, I'm new to audio, so I can't say whether the amp is better than this or that, has better imaging than this or that, is more dynamic than this or that. I can say however, that within seconds, I knew the Tu-8600 was truly and remarkably fabulous! The reproduction of vocals is nothing short or miraculous. What an experience, what a product.

Thanks much Victor!
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Old 10th April 2020, 09:46 PM   #90
vkung is offline vkung  Canada
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Join Date: May 2005
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What an exciting moment to be involved in your masterpiece!


Remember, you and your son to built it... Of course it sounds marvellous. And sentimentality, this is the best amp for you because you and your son made it.
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