Elekit TU8100 Class ATube Amp Build Part 1 in 4K

Part 1 of this single tube amp build
.

[@craggercragger8989]

Enjoyed watching this, 12volt. Eagerly awaiting part 2!

[@KillerZero259]

Yesss, more 4K videos please!!!

[@ScrotumPole]

omg you said solder instead of soder, thank you thankyou thankyou.

[@12voltvids]

soder sounds like sone deviant sexual act.

[@zx8401ztv]

You had me laughing like a mad man at the start, bloody translations are so funny, even the chinglish ones you get with china made items are so funny :-D. On some insturctions its simply impossible to do without hurting yourself, and some need a chicken a spoon and a preist to do the job, and thats insturctions for a multimeter LOL :-D. Sometimes google translate isnt too bad, you can sort of understand roughly. The second you talked about valves/tubes i thought about the old tv's, the PCL86, ECC83, PCL82, PY85, PCL806, and others come to mind, yes the sound was a single pentode i think (my memory has faded a bit), plus anode output transformer down to a oval grey painted speaker. I had a mono record player, it was a suitcase type, A "Dansette", they worked and were fun at the time, eather B.s.r or garrard deck i think, the B.s.r was really common in the transistor and chip amplifier with wings era, The TBA800 and similar, i think. Im sure you know the sort, the wings were soldered to the heatsink and the pcb. Thats a nice kit :-D, i dont think instructions are really needed unless the psu or setting up is needed, im sure you will double check the parts later, and look at the schematic for voltages and ways to check each pcb. The first kit i did was a keyboard from maplin electronics, it was for the sinclair zx81, a real keyboard with auto shifted keys and leds LOL, it didnt work, i put all the diodes in the wrong way round LOL :-D, i was a silly bugger :-)

[@12voltvids]

I remember my first kit. Radio Shack Science fair P Box. "Goofy Light"Basically an oscillator and an audio transformer with the oscillator going to the secondary finding and the primary going to a rectifier and a resistor ladder capacitor bank. Depending on how it was wired the NE2 bulbs would either blink in a sequence or at random. The oscillator made a simple DC-Dc converter that would charge capacitors up. Once the voltage got to about 60V the neon bulb would fire and discharge the cap, and it would start over. I built several digital clocks, some with HUGE displays.

[@zx8401ztv]

Ahh yes you like digital clocks, i remember :-). Oh i also had a "150 in One Electronic projects", i think that was a tandy sold product. It was a wooden tray with components mounted on a cardboard inlay, each component had its leads brought out to chrome springs, so long wires could be connected to that component. Every spring had a number. There was a thick book full of projects, pick the project, then link the numbered springs with wires. It was so much fun to try out transistor radios/oscillators/amplifiers and more :-D. And the book showed the circuit and a discription of how it worked. I loved that product, and i learned basics too :-D

[@gizmothewytchdoktor1049]

chinglish is hilarious!

[@YouAllKnowBob]

Excellent! I love kit building. I miss Heathkit, but am sure that, if they were still in business, I couldn't afford them at today's prices anyway.

[@12voltvids]

I couldn't afford them when they were in business!

[@c.brionkidder9232]

Robert Gibbons you'll be excited to check out the new heathkit.com!

[@dmcintosh1967]

I have many old tube radios and my first was zenith radio with an RCA jack for a turntable but you could plug anything in to it as long as it ran off a battery or got a hum form the speaker. the zenith radio sounded better then junk Bose. was made in the year 1957 and was running with all its original parts.

[@12voltvids]

Yes many of those were hot chassis.This one uses an inverter. That is what the IC and FETs are for. To run the HV inverter, so there will be no ground issues. The unit runs on 12 volts.

[@SteveHolsten]

Nice informative video as always. Thanks!

[@Watcher3223]

It may be cold, but the sound of valve amplification will warm it right up. ;-)

[@12voltvids]

You got that right. I have 2 other tube amps. A vintage McIntosh, and a more modern Yaqin plus a hybrid Luxman.

[@5speedfatty]

OMFG!!! im subbed to you because i like watching tear downs, but You have a priv!!! I love my BB Priv, but its under rated among the online reviewer guys. gotta put in a good word for blackberry!

[@12voltvids]

The priv is the best phone I have ever owned. My daughter also has one, she got hers when it first hit the street, and just loves it. The reviewers were taking a little payola from Samsung and Apple me thinks.Full Android experience, and security patches the day they are released. I also have a Z30 and a Classic. The Z30 is a great phone too, the Classic, well lets say it could have been much better if they didn't get Iphone maker Foxconn to build it. They went cheap and it shows. That's my work phone, and I have had to tighten screws repair the keyboard when the Q key fell off.Priv was the last one made in Canada. They assembled them in Mexico, but the main components and board were made in Waterloo Ontario.

[@5speedfatty]

yea i read that the priv was the final one to be made in house at R I M. made me really sad because this thing is hands down the most fantastic thing ive ever ran android on (ive even run it on a PC) the keyboard was what did it for me. Ive always been a fan of balckberry for the keyboard, and no one else is doing that these days.

[@12voltvids]

The critics slammed it saying it was "too expensive". Well yes it was but then the phone was mads in Canada, to Blackberry standards which were the best in the industry. You pay for quality. They were blowing them out on Black Friday at 397CDN 299 US. I should have bought a few spares. If they drop the price again I am going to pick up a few and just leave them in the box. I don't care if newer phones have a higher spec CPU this thing is plenty fast enough for me, and the keyboard is the feature I really love. It makes sending messages so easy, and error free. I hear they are bringing out another keyboard phone, but it will be a contract phone so who knows the quality. The in house phones from RIM were built to last. I have some very old RIM phones, and they all still work fine. I have an old Torch, Bold, Z10 and Z30. Never had any trouble. The Q5 and Classic from work have both had their share of problems, and are just a cheap Chinese hunk of plastic and metal covered plastic. Yup, the metal edges of my classic have worn away. Under it is a plastic chassis.

[@markmarkofkane8167]

That would be a challenge to me in English. Looks like a cool project. Enjoyed the translation! I think a step by step video would help with kits. Especially for newbies like me. Also, wouldn't clippers that resembles nail clippers be nice? Better Be Right Or Your Great Big Venture Goes West is what my teacher taught back in 1979.

[@ryans413]

It's like building a Lego kit but with electronics

[@12voltvids]

At least once it is built this does something.

Oh my, you really rendered and uploaded a 40 min 4K video...

[@12voltvids]

Why not. Once compressed it was only 3.7 gigs. This 4K is relatively low bit rate as there isn't much movement. It was compressed to 12m bit with a peek of 18

[@MichaelBeeny]

It's funny to think that as a kid I used to make such amplifiers with just pocket money. Now it must be the most expensive way to get 2 watts at 10% distortion. Still, does look fun to build. Be interesting to make a comparison video with a class D 3 watt amplifier you can buy for for a dollar or two!! I wonder which one will measure and sound better?

[@12voltvids]

First the tube is rated 4 watts 10% distortion. At 2 watts the distortion will be much lower than that. Tubes have a different sound quality that no solid state amp can match. Its not that solid state are no good, they are actually much better spec wise. It is just the way a tube processes sound is pretty much in step with the way the human ear respond to sound. The distortion created by tubes is even order distortion and harmonics, and these sound very nice. You will hear musicians referring to "tone". People spend a lot of money to get that "tone".There was another kit there, a whopping 8 watts. The cost 1,000.00!

[@BouvardPecuchet]

Hello. Question from Italy. I've been watching these four videos because I purchased the TU-8100 Kit from an ebay japanese vendor and I'm going to build it. I'm waiting for the delivery. The fact is that this is not my line of work, I have no experience on this. After watching for the first time your video I found a good resistor color code guide online, i saved it and I will use to recognize the value of the resistors in the plastic bags of the kit. On the other hand, I didn't find a good webpage to understand if other components have a polarity and how to recognize which is the anode, (capacitors, diode, etc). I'm a bit confsed, could you suggest a reliable webpage for this polarity thing? Do you have tips for a newbie like me? Where should i take extra care?

[@12voltvids]

Diodes have a band on the kathode and polarized capacitors are marked.

[@BouvardPecuchet]

Thanks@@12voltvids

[@geojor]

thanks ...

[@t0nito]

I wish resistors had their values written on them instead of colour bands, for those who are colourblind like myself they can be a pain.

[@umajunkcollector]

agreed!

[@t0nito]

Yeah meters are good when you know the resistor is ok, as in checking the value before installing, the problem is when a resistor in circuit is bad and you don't have a schematic, the meter won't help you there if you can't see what value the resistor is supposed to be.

[@briant333]

Is this the TU-8100? Will be interesting to see if the dc-dc supply puts any noise into the signal

[@12voltvids]

It is the TU8100, and the sample I spent some time listening to had no noise at all. The DC-Dc converter is probably operating up around 100KHz so any ripple would be well beyond what the audio output transformers could pass anyway.

[@briant333]

Yes that's true. It looks like a very nice kit so far with good build quality. Would be nice if they made a single ended el84 or el34 version but I guess they would be VERY expensive.

[@12voltvids]

They do make one. It is available at the same shop I got this at. It was 1000.00!

[@54tristin]

Where do you get the kit?

[@12voltvids]

I bought mine at lees electronics in Vancouver but they sell them online. Lees also sells them online.

[@jaa93997]

🤔 i am a little concerned about the part in the manual that requires the children to be fed to the dragon, is that really mandatory?

[@12voltvids]

There are days I wish I had fed my kids to the dragon!! :)

[@williamsquires3070]

In the US, that is.

[@KenJencks]

I want to build one!

[@c.brionkidder9232]

Ken Jencks no doubt, me too

[@williamsquires3070]

How much is the kit, and where can one buy it?

[@Sloxx701]

Easy to find on Ebay - www.ebay.com/itm/ELEKIT-TU-8100-PCL86-Vacuum-Tube-Amp-Kit-/230875506932?hash=item35c140a8f4:m:mJ5woInMnQxOS7HWzBKP-6Q

[@12voltvids]

William Squires I bought it at Lee's electronics in Vancouver bc. I did cover that in the video I think. $355.00 cdn. They sell them online on their web site.

[@PhuckHue2]

they source them from China and probably only pay $20 each

[@12voltvids]

Considering that the kit comes from Japan, I think it is highly unlikely they source them from China. The manual was in Japanese, not Chinese.Web site is www.elekit.co.jp It is 25704 yen, which at todays exchange is 275 Canadian dollars, plus there is shipping on top of that.The 8 watt kit is 60,000 yen 692 Canadian plus shipping. That one sells for 1000 locally, and due to the weight of that one it is probably over 100 in shipping, as it is heavy, about 20LBs.

[@SuperGrover]

btw there's no 'r' in Pentode...

[@zeoNRider]

Part2, when?

[@12voltvids]

V. Maleta tonight

[@zeoNRider]

What time?

[@12voltvids]

When I build and edit it. Some time later today there will be another installment.

[@subigirlawd_7307]

where's the e-cup? and yeah you shouldn't feed children glass and bags in plastic bowls and then eat them consult your doctor first!

[@lelandclayton5462]

4K? then why can I only view it in 360p?

[@simuler]

youtube needs time to process the 4k, before get available

[@N00B283]

refresh it

[@c.brionkidder9232]

i wish I'd been there, because i can read 日本語

[@12voltvids]

I can read schematics, and if you can read schematics then it doesn't matter what the instrustions are written in.

[@c.brionkidder9232]

yes, you seemed to haveno trouble at all!

[@c.brionkidder9232]

solder. because there's an L in it after all!