Building such personal relationships and letting us tune in and get to see the internal boards the vibration dampeners the heatsinks tubes was a awesome tour and you feel like this product has some geart and soul thanks Mikey and thank you Nat for bringing us in and for such awesome products which i hope to investigate at some point in the near future

Love the video, Mike. Thanks for making the trip and bringing back some behind the scenes views from the factory!

Awesome insights Mikey! Jay's Iyagi recently named the NAT Audio with the transmitter tube as the best tube amp he has ever heard (and as a professional seller than reviewer he has heard many).

Mikey Salute, Thanks that was AWESOME. Great presentation. I want one.

Excellent clip, nice work! you were making me uneasy reaching around and handling that large tube lol!

Thanks Mikey! Super interesting brand. Outstanding design and execution!!!! One hell of a great trip!!!

Really interesting and instructive, thank you Mickey! and nice shirt by the way ;-)

Hi Mikey. It is great that you got to Serbia and NAT Audio looks fantastic. I just wanted to correct something about the QB5/1750 tube. It is not a triode but is a tetrode. Tetrodes have a screen grid and usually not considered as linear as a triode. They might be using it connected in triode mode by tying the grids together. Another choice for a transmitting triode tube similar to this would be the 3-500Z or the 833A tube. These are also well known RF transmitting tubes but can be used for audio. NAT Audio actually says in their description that the QB5/1750 is a triode - not correct - it is a tetrode. By the way, I have many good friends on Ham Radio in Serbia. Some of the guys at NAT might be Ham Radio guys if you asked. Thanks for the fantastic video of this great company. Prof. Jim

I really can understand your excitement when you are explaining all the parts. Great products great company

Bless you... For the person sneezing in the background. Very well done video, so well made amp.

I need this!

They look amazing on the inside. What speakers are best suited to these high power output direct-heated single ended triode designs? I would imagine that a benign impedance curve is still a prerequisite?

Wow. Nice. Thanks for showing us!

Looked at their line up for less heat generating amps. While youre there, can you audition the Magneto and the Generator CT amps and report to the Tribe what you hear? Videos on these guys, please!

Though where is the "artisanal" build quality, and ribbon connectors..lol ok M.L. THIS is true equipment. Thank you for this video. Very well explained.

OCD is still gone! Good to see you while you are on the road. 😊

What are the costs and expected lifespan of the tubes used?

OCD HI-Fi Guy, Subscribed because your videos are always awesome!

Outstanding summary Mikey! Love those red leather shoes!

Mikey you bring us such a unique product line. And no one is more emphatic about it!

Maaaan I want one of these puppies so bad.

As usual VERY INFORMATIVE

Agree these are very cool products, and use amazing parts. Thanks for the video! I would just note, though, that virtually all PCBs used nowadays by any company worth its salt employ through-hole plating. NAT's use of curved traces, too, (and lack of soldermask) is very cool, but FWIW I would argue that regular, sharper bends in traces do no harm whatsoever. You would have to get well into the MHz before it would truly matter to performance. If anyone attributes this to better sound quality, that's fine too! In any case, the PCBs, like the rest of the components, show the designer's passion and attention to detail. I like that he does them that way.

Amazing quality of design, built and parts. Unique, performance oriented, building philosophy. It's the first time I see extensive internal vibration control, (actually, the second, there is a Chinese guy in Canada using silicone everywhere inside, but here we also have order and discipline). Also very high level of modular shielding of different blocks or parts. You have skyrocketed my appreciation for this company with this presentation. Well done OCD Mickey! So anyone in need of many watts, can now properly listen to tubes unhindered. Because of NAT Audio.

Thanks for this factory insight. I love tube amps and it would be awesome to own a NAT amp. Love the aesthetics and concept.

Bespoke design at its finest ❤

Gotta love OCD Engineering!

Great video. Come here to Croatia too. Its summer now 😎 According to topic of video. Great amps, from great engineers from Serbia, but my choice will always be SET amp: Lamm ML3 Signature 😎

Holy shnikes! ❤️ Lustworthy gear. Magnifico!

Just out of curiosity, how much did Jay's Iyagi charge for the NAT review?

Hey Mikey, what is the life span (Hours) of the ceramic tube?

Wow! I worship at the alter of SET, no feedback, class A and transformer coupled. That's what Im talking about! Beautiful video that showcases the passion for quality components and thoughtful build. I build in a similar fashion but given the constraints of very high voltage and the power level of the tubes we commonly work with you can't get that kind of power in this kind of design. He does. Absolutely awesome!

Hello, this is an excellent tour…wondering if you are going to the Fischer&Fischer facility for a tour or is there a video already…before I buy when you get back…

200uf at 1500 volt rating film cap!!! WOW!! Is it permissible to know where they source coupling caps?

Did a little digging on the QB 5... The tube has 1600 watts TOTAL plate dissipation. When used at 50% that is around 500 watts plate dissipation which will roughly equal to 100 watts output in SE. Anode voltage is 4K ( WTF). Filament is 10 volts at 10 amps (!!!) Anode ( Plate resistance) is 16K-26k ohms. The this tube has 2 grids..so load resistance is unknown...but output transformer must be HUMONGOUS! The inter-electrode capacitances are not that far off from a 300b/ 2a3 and since its a transmitter tube the amplification factor is quite high...which means maybe ( however unlikely) a 6sn7 may be able to drive it. That is a supposition...tube curves while triode connected are not supplied with the sources available...So NAT has to measure it themselves....which is what one would expect. ;)

You must be selling NAT, that's when you rave. And put down other products. Good salesman.

Great products. However, the best PCB in audio signal is no PCB. Point to point wiring is the way to go. Audio Note kondo knows that. Cary audio knows that. Not saying that NAT audio sounds bad. They probably sound wonderful. However, it would be better if the were point to point.

Where are the Magma M's and Magnetic pre amp?

😱🤯🫨🤩love this

is it better than GaN?

Are you sitting on the toilet at 12:23?

The Russians built tube factories like Reflector etc for military use. Vacuum tubes are impervious to EMP, what happens when you bust a nuclear cap, especially in the upper atmosphere. In 1976, a Russian pilot defected to Japan in a MIG-29, and of course, it got totally taken apart down to the screws. They were amazed that it used, yeah, you guessed it TUBES !!!. But, you knew that right. they only kept the factories up and running after "Audiophiles" bearing gifts from the West ($$$$) talked them into keeping them up and running, for all of usLee Deforest lovers out there. alos years ago, crazy Dennis Had was building some insanity