Super small spy radio hidden in a matchbox.

[@LA6NCA]

I have made a website about this radio. www.la6nca.net/homebrew/matchbox/index.htm Uffda, Oscillator bias resistors is missing in schematic in video. It is right on this page. R and T on xtal have also been swapped.

[@SeAfasia]

Helge check the link...

[@Coheteradio]

The html title tag say "LA6NCA TUBE TESTER" (ups! haha).

[@ElectromagneticUK]

Great information.

[@Jason-nm8bs]

Thank you very much

[@davidgrey943]

@LA6NCA if you could publish the dimensions on the various coils used on your homebrew projects would be fantastic for those of us without 3D printers. I have a No.48 set I would to get up going it is only a case of getting my self organized. Always enjoy your content I am also learning CW so your sending I can copy a little bit. I like how you write down what you are going to send must help with your sending. What speed do you send at.?

[@StephenWiddett]

Hi Helge Your videos are fantastic and we love your Norwegian accent...your English is excellent !!! Please continue to do your own voiceovers ...it is your individuality that makes your videos so special!! 73 Steve W8SAW aka G4DFN

[@peterhausamann5923]

Awesome as usual. In Australia we have a person who also does homebrewing, and often with second hand parts. He is Peter Parker VK3YE and also on KZbin. Both you and Peter are very inspiring, especially in terms of showing that great communications can be done on the cheap. Thank you again for showing.

[@LA6NCA]

Thanks for the great post. I've checked out VK3YE and I'm impressed with what he's made. 73

[@janiceemery2008]

I don't know you personally Helge but, I am proud of you for what you have done in ham radio. Thank you again.

[@LA6NCA]

Thanks for the great comment. It's fun to read the comments.

[@peterworrall1644]

Congratulations on the QSO and thanks for sharing the video. Your work is an inspiration to us radio constructors!

[@MrBugsier5]

Amazing distance. The wonderband 80 meters..

[@thes764]

Congrats for this QRPP achievement Helge, amazing results. Best 73 from Germany.

[@marco_0599]

Fantastic Helge! I enjoy all your videos with the old German receivers and transceivers, but this is a new one! 73

[@LA6NCA]

Thanks for posting. I think the next video will be about a German transceiver. 73

[@NamasenITN]

Are you all fond of AI text to speech used for the commentary (with a strong American accent)? I would have liked to hear the guy's voice: at least he is real and authentic.

[@LA6NCA]

Thanks for the comment. It was easier for me to do it that way. It is not so easy to speak without a strong Norwegian accent. Many from Norway have this (Jens Stoltenberg in NATO) I get to practice a little. Some have liked it and say that they can better understand the video.

[@StephenWiddett]

If people cannot understand you Helge, they are not listening!😎

[@ralfkruse7565]

@LA6NCA This is very astonishing, with 0,3 W, and antenna only 1m high. For your AI translator, it's OK, but your Norske aksenter is not difficult to understand. Even when you speak Norsk, it's so close to German, I get 50% without translator. 73 from F1VEL ex DB3YZ

[@Sctronic209]

That’s awesome fantastic workmanship.

[@larspregge6420]

Really cute piece of radio.

[@billjames3148]

WOW So cool. Nice to see your hard work in action, very rewarding.

[@SuperLaplander]

Cheers Helge, what a cool radio, well done!

[@mspicela]

Very fun video! It's amazing that you can do so much with so little. It's also neat to see how excited you were to see it work. I hope I continue to have that kind of enthusiasm of my whole life! Your English at the start of the video was good enough that I don't think you would have needed to use the voiceover.

[@LA6NCA]

Thanks for the nice words.

[@nomadradio]

This would no doubt win the homebrew contest at the AMQRP 'five days in May" gathering of the AMQRP society the weekend of Hamvention in Fairborn Ohio. Bravo Helge and73.

[@LA6NCA]

Thanks for the info. Do you have any links to this? 73

[@JDK45ACP]

That was amazing! Fantastic job on that little transmitter.

[@psocretes8183]

Extraordinary. Thank you.

[@fulviofranzini5829]

Amazing radio, amazing results, amazing video. Congratulations, best 73 from Italy de IW2BO

[@LA6NCA]

Thanks for the great post. 73

[@ys1rs]

Fantastic!!! I thought that you were only dealing with military boat anchors but no, you are an amazing integral han radio operator. Thanks for the inspiration. My smallest one has been on a Altoids tin Can and also on a tuna tin can. None of those my own design. Congratulations!!! The antenna is very cool and simple too. NVIS at its maximum expression even the band choice is optimum for NVIS. A hug from San Salvador. 73, Rob, YS1RS

[@LA6NCA]

Thanks for the great post. Nice to hear. I have made a few more videos about tin can radios. Check out my channel here on KZbin. 73

[@graemezimmer604]

Wonderful little radio! 73 OM.

[@michaelgreenwood1162]

Brilliant, super effort. Rx works really well.

[@willian.direction6740]

Great job, I am going to try that antenna never seen it before.

[@marknesselhaus4376]

I love the small, compact rig. The only issue I would have is using the small key. Not having a sidetone is not a problem for such fairly basic circuits and 0.3 watts is plenty enough as I have been strictly QRP for years while using only dipoles and end fed wires. Take care and 73 de wa4jat

[@mollyfilms]

That’s simply amazing to hear him key with a Swedish accent!

[@mercuriall2810]

Great work, I’m impressed by the range achieved at that power!

[@ernisj.8087]

Oh , I like oldscool tech!!

[@bhk7az641]

Very nice work! Beautiful example of miniaturization and circuit design. Enjoyed the video and the CW contact. 73 de K7ZB

[@tomweickmann6414]

Amazing. Envy level through the roof. Please, next time bring a comfortable chair, small desk with a lamp and a bottle of The Good Stuff or that cheap cherry wine they make up there that us teens prized back in the 70s. And Ann Margret.😊

[@haraldlundh9739]

Thank you Helge!

[@papafrank7094]

Amazing. Thank you so much for sharing this. I may have to break out my soldering iron to replicate this beauty. All you'd need to add is a fishing pole and a small tackle box with lures, a candle and some tinned meat for lunch and this beauty would be exceptionally covert. I wonder just how much smaller this could be made with SMT components. Thank you. You gave me the first smile of the day. Be blessed.

[@LA6NCA]

Thanks for the great comment. Check out my website if you want to build one. I will try to build one with SMT components, so we'll see. www.la6nca.net/homebrew/matchbox/index.htm

[@darbymathis7670]

Excellent! thanks again for a great adventure! 73 WD9M

[@RadioProyectos]

Wow, incredible 👏👏👏👏👏👏👏👏 Congrats... Fantastic QRP

[@w4twa]

Congratulations from W4TWA. Well done. You make me want to try! 73!!!

[@LA6NCA]

Good to hear, you should build a normal sized one first. Check out my website for more information. I had forgotten two resistors in the drawing in the video. 73

[@Roddy1965]

If that was my project I'd very happy with this result, but it's your project and I'm glad you're very happy with the result! Well done!!

[@jarlgaute]

Hi Helge I really get inspired by your work, and insight also about old ww2 radios. I got my license now. I hope I one day can achieve something like this. But for now I should probably buy a radio first and get on the air and build later.

[@LA6NCA]

Thanks. You should start by building something a little bigger.

[@Steven-re7xt]

My fave is the radio fixed in a Altoids box .

[@BalticLab]

Nice! I saw this on Hackaday and it sparked my interest! Great video.

[@alexpinkerton7459]

That is surreal.. I'm lost for words that something so small (and powered from a 9v battery) could transmit so far!

[@ElectromagneticUK]

Nice spy radio. Very interesting antenna used by Finnish special forces operating behind enemy lines during WW2. Very brave men and women. I think there was some amateur radio operators at the time helped with the development of radios/antennas used. Great video to learn from. Best Wishes.

[@LA6NCA]

Thanks for the info. I have made a video about the KYYNEL that was used in the Finnish winter war. Out in the video you can see the antenna (from 5:30). It is such an antenna that I use in this video. kzbin.info/www/bejne/sKvNXomNp6mkZ6s 73

[@marcusf.6722]

Miniaturisation has come full circle.

[@2locma]

I'm not a radio operator at all, but this channel is pretty cool. already subscribed. Good luck and keep going!

[@SpinStar1956]

Really Awesome Helge. I work with these components and you did a fantastic job. Hats off to you! 73…

[@LA6NCA]

Thank you..

[@migalito1955]

I use the same type of Nvis antenna. I only use Qrp and care about conversations & not contests or DXing.

[@Sammenluola]

Excellent video, and greetings from OH, 73

[@daveengstrom9250]

This is some COOL STUFF!! Love it.

[@janiceemery2008]

You should be very proud of yourself, excellent job. It is possible. Thank you for sharing.

[@LA6NCA]

Thank you.

[@STUDIOONTHERECORD]

Good job. 👏👏👏

[@wolfgangstupfert6556]

OOOHH, that is absolutly great. Thank you. 73 - DK5BP from Kaiserslautern/Germany

[@jakebrodskype]

I'm impressed. 73, DE AB3A

[@fencingcoach3w]

Your English is wonderful. Your diction is excellent. Both better than many of my countrymen, probably including me! Regards from Peter, Sheffield, UK. PS. I was very disappointed when the AI voice kicked in, but your content is very interesting.

[@LA6NCA]

Thank you for liking my English. But it is not so easy to get everything I want to say said in English. Alternatives are Norwegian with subtitles. After I started with AI voice, the number of viewers has increased considerably. I get to practice a bit in English then too.

[@maxjakobsen5526]

Fantastisk. Det kalder jeg en kompakt radio.

[@valler1979]

That's cool! A lot of fun! Greetings from Canada! 73!

[@PY4FQ]

Amazing QSO!! Congrats!

[@josephdeery4931]

Hi thank you very very much for this video I am non-sighted so I have no vision I loved the audio description!!!! it meant I could follow the video perfectly thank you very much Joe

[@LA6NCA]

Thanks for the great post. This was fun to hear. I am glad to hear this. 73

[@SimEon-jt3sr]

Oh it's that why i never got my shortwave radio to work? It has a giant antenna on a spool but i didn't know you had to have the whole length out like that,or however long it needs to be. Maybe the antenna was only 12 feet

[@sincerelyyours7538]

Amazing! And I can't get past the QRM in my own backyard using 100 watts :>( Great work Helge, as usual. Love your work! JS2OLO

[@mohabatkhanmalak1161]

Amazing transciever, very James Bond!🐞

[@salve-amicus]

Very funny equipment but I dont know is the new line in QRP funs or really SPY school ? Best regards Helge take care 73 !

[@roberts1938]

Fantastic material. Congratulations! I'm adding this video to my favorites. In my free time, I might try to build such a mini radio station. I was interested in the information about agents using such antennas during the Winter War. Can you devote one of the next episodes to this little-known historic topic? This would also be very interesting. Greetings from Poland.

[@LA6NCA]

Thanks for the great post. I have previously demonstrated this KYYNEL radio. kzbin.info/www/bejne/sKvNXomNp6mkZ6s At 5:30 in the video, I show the antenna. It is the same one that I use in this video. 73

[@leonardoandrade9761]

Excellent as always, wonderful work, congratulations. Greetings. CX2ABF

[@ksb2112]

This is just marvelous!

[@rádiosantigos1958]

Well done! Congrats!

[@jordanclarke2996]

Ok I'll comment. Love it! This is what radio is about for me :) Cheers VK3ACU

[@michaeleades574]

Great video 👍

[@W6EL]

Fantastic! I cannot believe how well that worked. Your "micro circuits" are really impressive. Especially the little coils next to the op-amp. How long did it take to design and build it?

[@LA6NCA]

Thanks for posting. This coil is 3-D printed. I can later post the files on my website. It is easy to build when you have such a coil form. 73

[@johnfreitag6185]

Inspirational and challenging! Very much appreciated.

[@delbenjamin9830]

Very cool stuff.

[@kareno8634]

*Hail!* Perhaps next life i will understand more, until then, this was Great! *Cheers!*

[@Steve-GM0HUU]

👍Very nice Helge. Thanks for sharing. I wonder what IC(?) Was used for the RX mixer please?

[@LA6NCA]

Thanks you for your comment. The mixer is the ADE-1ASK or ADE-2ASK from Mini Circuits Many other mixers from Mini Circuits will work. Just look at the data sheet that they are designed for frequencies as low as 80 meters. Remember that I have left out two resistors in the drawing in the video. Look at my website. 73

[@WernerGabrielKameramann]

Very very good👍🏻 U R a real Master. Respect!

[@LA6NCA]

Thank you.

[@thebuggy736]

239 km in daylight on 80m with 0.3 Watt power The distance at night should be even better. The Pixie 2 transmitter for 80m has not a good receiver but it should also work well. Of course it is an advantage to be as far away from settlements and interference as possible.

[@LA6NCA]

Thanks for the comment. Yes, it was about empty on the 80 meter band when I made this video. The signals increase considerably in the evening. The receiver on this radio is very sensitive. And quiet. Although it contains only a few components. .

[@thebuggy736]

Thank you. I like to build one and I found the correct circuit diagram at the web page. Do you know what core do you use for the antenna transformer? I like the little connectors for antenna, key and headphone. This is a good idea. I think it will be more reliable as the standard plugs when you use a low power transmitter. Also I will try the antenna. I think I will use 6 AA batteries for the 9V battery, but you wanted to demonstrate a tiny transceiver and the 9V block battery will fit this perfectly. vy 73 Jens vk4pe

[@fykasko]

Absolutely incredible!!!!

[@MrExogenus]

Really good !!!

[@StreakyP]

less IS more..... well done

[@rickyennico7492]

Awsome qrpp. Keep cw in the air! 73 PD9W

[@TheMacbu]

Wow, very cool!

[@billalguire74]

Absolutely Fantastic!!!

[@YT7RR]

Hi Helge !! The crystal oscillator cannot work in this scheme, the first transistor needs polarization in the base ,best 73

[@LA6NCA]

Uffda, yes you are right. There are two resistors missing. The right one is here: www.la6nca.net/homebrew/matchbox/index.htm thank you, 73

[@StefanDc4kjs]

Like James Bond from Departement "Q"👍. Lg S3

[@valentineshay5311]

Good compression

[@ericblair3009]

great system!!! and great video too1111

[@sbcinema]

great work

[@M1sc3]

Espetacular! Interessante como algo tão pequeno ainda pode enviar um sinal por uma distância tão grande!

[@williambrooks6629]

Thanks for the video, some great skills on display. The antenna is very interesting. I will subscribe in the hope you put up the details. I would like to try some nvis 73 Will, VK5WB

[@ugsisr]

Fascinating Thank You

[@Jason-nm8bs]

That is amazing, would love to be able to build one.

[@LA6NCA]

Great, Look at my website. Forgot two resistors in the drawing in the video.

[@kurtstefans5738]

Very good! I may try this.

[@Bartok_J]

The transceiver is quite similar (although smaller) to those Chinese Pixie kits that are sold very cheap on e-Bay and Ali Express . They operate on 40m though, at about 500mW, and can work distances of several hundred kilometres. I wonder about the Morse key. Did you make it yourself? I'm glad that I could read LA5MT's Morse, as mine is rather rusty. ;-) Best 72 es 73 de GØOIW

[@kilcar]

Takk skal du ha! Many thanks. This is intriguing for me as my mother worked in US Cryptology during World War II. She never said what she did during the war, other than " crypto". Again, many thanks from Oregon USA

[@nxesr]

This is brilliant for SHTF 👍🏼👍🏼👍🏼

[@LA6NCA]

What is SHTF?

[@ChrisGoosman]

@@LA6NCAacronym for when the Sh*t Hits The Fan, in other words when things go bad.

[@joeblow8593]

Thank you

[@davidgrey943]

Where can I pickup the coil formers for your projects and if the coil formers are custom built the sizes of the coil both outside and inside size of the coil formers. Thank you for sharing your transmitters and receiver projects on the internet. 73's from ZL.

[@LA6NCA]

Thank you for your interest. I designed them myself and printed them with a 3D printer. I can post measurements on my website. But the most important thing is that you measure the resonance frequency. I can make a description on my website. www.laud.no/la6nca/

[@G6PBS]

Great video Helga, genuinely informative and entertaining. 73 de Colin G6PBS

[@tonystephen6312]

Long live c.w..

[@James-hy8gu]

Wow impressive just with .3w

[@pak_guru_toro]

Amazing

[@RenoSimpson]

Yes it is very exciting I was so excited I paused the video to write this and then moved on to a different video

[@sicks6six]

I'm sure I read in an article the OSS during WW2 told operatives to use fence wires for dipole aerials, they could be miles in length,

[@chriscomms.2399]

Great video and definitely a cool transceiver that you made. Can that style antenna be used for 11 meters Sideband if it is cut to length ? Also, I really enjoy the video in English 👍🏼

[@graemezimmer604]

He is using NVIS (Vertical Incidence) coms in the low HF bands, however there is little NVIS at 11m. The antenna would still work for ground wave, but is too low in height to be much use on 11m.

[@stevenm45]

Hi, Nice video! How did you produce / source the female voiceover please - it’s also very good. 73, Steve UK

[@LA6NCA]

I first write subtitles, then I export the texts as subtitle files. I transfer these files to AI generated audio on the internet. Then I cut up this audio and place it under the texts in the video.

[@michaelmiller641]

Amazing! QRP!