I don't know much about electronics, but I think the cat needs to go to the vet, when cats wine is because something hurts or is bothering them.

I'm glad to see that suspicious tube glow was just led's. The presence of transistors isn't very inspiring though, unless they're part of a sidechain or the power supply circuit.

Thank you

No spiqui ingres

bro what is the specification of transistors used ?

Thanks for the video! I was looking for a radio project and was hoping someone had made this.

Scissors would work better on those bags.

Get you a FX-AUDIO TUBE-03 tube preamp to feed your main amp. Replace the tubes that came with it to a matched pair of 5654Ws, and you will hear wonderful base, and all the way up! That is my setup here at home. Mine is driving a 100W per channel class D amp that drives a pair of 12s with tweeters.

*lol, very well played sir!* It's Class-A so the audiophiles shouldn't complain 😁 I have heaps of MOSFETS and transistors floating around. I'm going to slap something similar together using a Darlington and some 18650's.

good audio

trash ahhahahah

Tubes/valves add even harmonics and soft clipping which enhances the mid and bass frequencies which is pleasing to the musical ear! Guitarists like Mark Knoffler, Brian May love this sound! Many audio fans also find this a pleasing to the ear! Although valve power amps are expensive a solid state power amp with a flat frequency response coupled to a valve pre amp is a cost affective solution as the even distortion is added at the pre amp stage! It adds presence to the signal which gives like live music into your listening area, it seems to add an octave above fundamental and a 5th above ! I used to have 2 Leak TL50 power amps and a .1 % plus pre amp but sold it as the TL 50’s power tubes (matched pair) became too expensive (£160 ) to replace! I now have a pre amp like you have here feeding 2 solid state FET power amps that should last a long time I hope! Fraser.

I like the design of this meter. Unfortunately you have to hold it at a certain angle otherwise the numbers on the screen fade and you can't barely see them. Once you finally get the angle right and you try to take a reading the numbers jump around excesively before they finally settle down. I paid about 20 bucks for mine, but was thinking about getting a more expensive one due to the fancy design. After testing it I changed my mind. It's not ready for PRIME TIME.

What if I use it along with a 15 watt Marshall amp to play my guitar? Could it work to change my tone for the better?

For the ncv, do you know what the display text means? Valt/Ualt?

Hey great video! Noticed the multimeter was on DC for reading the voltage. Could you pull 12V DC from that leg and use it to power a 12V DC amp like a TDA 2050? Cheers

Run the tube fillaments on DC instead of AC using a full wave bridge rectifier, that will eliminate the AC hum.

Which side is your input?

Just watching another video about the 6J1 preamp and the guy is testing it out on an oscilloscope. He says the 1 microfarad capacitors on the output are not letting the bass tones through and is suggesting changing those to 3.3 micro farad, or 4.7 micro farad capacitors. The video is called 'Tube preamp budget kit test and review' and channel 'JohnAudioTech'. Maybe the capacitor changes can give you a much better 6J1 preamp.

I feel for you, I spent the first week of October in the hospital with a colon flare up. It was brutal fortunately I did not need surgery. My prayers are with you.

Hi just wondering way can't we hear what it sounds like copy right for testing a product?

I have the same audio amplifier ic the data sheet says the real maximum voltage is 20 volts so if you wanna get almost the 15 watts is to use a 19.5 volt power supply from a laptop

Can I change leds? cause It has 2 blue leds and I'd like to put orange leds

I bought one but just realized I need a wall wart for it. I'll build it soon. Any idea of swapping for better capacitors will help it? Thanks?

Thanks for sharing I have 5 not working

If I touch the insides of my compressor I'm dead

Glad you went with LED 👍

In regards to your story about getting a shock, similar thing happened to me with a computer power supply when I was in my early 20s, made me extra cautious around AC power from then on!

Mine just broke on me from just testing 9Vs. Barely used the thing.

Thanks for the video!

Dear Sir great video, I hope you are feeling better, I am going and try one of these radios.

Hope translating in to Chinese (Simple）.

You could 3d print a new case.

Not sure how I missed this channel....instant subscriber!

Thank you sir, very >llustrative, just bought one, you helped a lot.

Man you need to build one of those scaffolding preamps next.

Thanks for the video very interesting.

Can i use 12vac to 12vdc rectifier to use with battery?

I use this with my portable ham radio tools - easy to replace - mostly continuity tests and low voltage.

Nice job building that radio! ❤️📻 Wishing you a speedy recovery.

Great video ….

Hey, hope you get your health sorted out. Awesome circuit and awesome aliens! 👽

Sorry to hear about your health issues. I hope all goes well with the surgery. I will be looking forward to your future videos. Take care. 👍

This thing works on 12volts ac supply... and you have not put those transistors correctly...I have built a couple of these and mine works fine, no hum in my preamps.

Bat naka tago ang connection mo pek yan

Thank You.

The cat!!! Lol. I got one too. Wish I could get ride of it! Great video!!! Thanks.

Here is the layout/plan/schematic of the circuit (and improvement), from an Italian video, 1:02: kzbin.info/www/bejne/pXKppGCvnZdgeKs

The cat adds a nice little distraction. You could use the purring to compare the base outcome with a semiconductor type. People will like it. Since there are no ugly cats it could also be part of the video. // Great Job, because in many reviews they talk a lot. Without any sound example!

If you use a metal case you need to ground it or it's a safety risk with possible electrocution and death of the user. To get the prongs out of a plastic case you can heat them up. Will slide out like butter. Enjoyed the video though lol. 21.5v looks correct for 5x4.2v cells.