That swan looked like at about 88 degree and quickly relocated when you went to report.... The swan is clearly transmitting.

A few days ago, this video came back to my mind, since I needed to trace down the source of a very annoying noise in my neighbourhood, which was jamming the whole RF spectrum all the way from 150 to 3000KHz. All I did was to walk up and down the street with a portable AM radio, but it took me some time to find a good null point, since the noise was really strong. In the end, the source was inside a newly-established mechanical shop, a few houses apart from mine. After talking with the owner, I found out the culprit was a compressor motor, which he agreed to fix after I proved him he was against the law for producing so much electromagnetic pollution! By the way, this video (and all the others) are amazing. This is what gives me joy for being into a cool hobby as this!

Never would have expected that high level of accuracy on a WW2 system. Very nice video!

Great video, thanks for taking the time!

It is scary how folks back in the 40's had this kind of equipment. Being a spy and having the thrill of Germans possessing a precise device to find you out; must have been "fun". Excellent video, sir!

Absolut fantastisches Video. Diese alte Technik in Aktion zu sehen und dann noch erklärt zu bekommen. Einfach toll. Macht bitte weiter so und viel Spaß. Liebe Grüße aus Leipzig/ Deutschland 73 de Marco, DO7NE

this is historically fantastic that somebody knows how this was done and has the equipment

My dad used to be amateur radio operator and with his help I gave a friday afternoon presentation long ago in elementary school on this very subject. Most presentations were about cats, dogs and pet fish. You can imagine the surprise and excitement received when the presentation was about secret spy networks and triangulation such as in your video! My dad though me the exact same drawing techniques for triangulation. Thanks Helge, great video!

That's what I pay my internet for, high quality content

Fin intressant video! Tack för den. För mig väcker det många minnen av de "rävjakter" jag deltog i som ung. Det blev många krysspejlingar, utom när man själv låg räv.

accuracy under a degree all these years later is amazing

An amazing collection of functional period equipment and an excellent demonstration of use. Thanks for sharing!!

Hello Helge, this is a great video. Very impressive that the equipment is still working after all these years. It was a nice surprise to find you here on KZfaq now in 2024. I was your neighbour in Dyrgravveien in Kongsberg in the 1980'ies. You drove a 1/4 ton (?) military truck back then. Regards from Kenneth.

That was a fascinating demonstration, the accuracy was impressive to say the least.

I'm downright jealous of this video! Big praise that the device is actually used in the field, not just displayed in collection shelf. The video concretizes wery well how the device works and how it was operated. BTW I'm happy that the operator of the agent radio got away before the raid, I don't dare to think what would have happened to him if he was caught.

Fascinating video! Your knowledge and hard work to first find and collect all this rare equipment is amazing. I repair guitar amplifiers built from the fifties to the eighties so I have a small idea of how much work it must be just to get this gear working and calibrated. Bravo! I read a lot of military history from WW2 and always wondered exactly how D/F equipment worked and was used. Very grateful to you for an excellent lesson!

a very cool piece of technology

Thanks for a brilliant video. I spent many years in the (S) branch of the navy and appreciate the effort you have put into collecting and maintaining the equipment as well as demonstrating its use. The RN version of this set for HF was the FH4. For MF it was the FM12. This had a "goniometer" to detect the true bearing from its reciprocal. We had a little verse, "Turning clockwise, signal rise - ship on other bearing lies. Turning clockwise signal falls - you've got the bas..rd by the b.lls. Cheers 73 VK5WB

Thank you Helge, for preservation of how the technology of WW2 was used by Techniques of the German Signal Corps to locate British or Norwegian Spies. I can only hope you continue to post your amazing Historical Techniques used to fight against the opponent who wanted world dominated. 73's from all of us Lone Star State Hams and Veterans. #BravoZulu 🎖️

The British agent would have made sure when you lifted the book off the key there was a big bang.

Super accuracy, I wonder if the agents were aware of how good this gear is? Well demonstrated.

Absolutely wonderful video! the realistic feel, accuracy of deployment, knowledge of the equipment, etc...... it is just a trip in time for sure. Thanks for all the fantastic and professional videos that you have done, and are still doing! As I was watching, I was finding myself in the early 1940's after Germans had occupied Norway. Thanks so much!!! Keep history alive! 73

Thanks for sharing your piece of history and taking us along with you

It is a rare piece of kit. Thank you for the excellent presentation 👍

Fantastisk demonstrasjon et privilegium å se på. Takk skal du ha.

I was an Electronic Warfare Officer flying reconnaisance missions in the analog days. The navigator logged the exact route we flew. I operated a radar receiver fed by a rotating dish. The signal of interest was fed into equipment which showed pulse width, pulse recurrence frequency and other data from which maintenance status of the transmitter could be determined. A direction finding (df) bearing would be logged with the time. At least three df bearings would be taken. After landing a mission debriefing was held and the crew activity reports provided which also included other operators data. The ground analyst would take the data and plot all the provided info which showed location and the "fingerprint" of that system. If it was moved to another location, it could be identified where it had been positioned. It was time consuming but it was the best info available at the time. We are now in digital times and signals hit an antenna in an airplane, ship or satelite, prosessed through computers and relayed direct to intel processors. The navigator has been replaced by a GPS compterized system and so have I. KE5UPM

This is soo cool to see these old machines in use!

Thank you so much for sharing this! As a WWII history buff, I've always been fascinated by this type of tracking technology. It's impressive that you're such a great collector, preserving these engineering gems. Thanks for giving us a glimpse into how these tools were used! Super cool!

Over the years I had many different WWII radios from aircraft, jeeps, and even a tank. But I would sell it off for other equipment, not knowing how rare it would become in the future! Nice to see so much saved and in use still!

Amazing equipment and a really fascinating video.

Very interesting indeed, thank you for sharing. Amazing that the equipment works so well after 75+ years, chilling to see the paint wear on the DF circular handle showing lots of WW2 use.

I have a lot of respect for Norway in WW2 And WW2 family links to both Norway and SOE ( Special Operations Executive ). / My father was a junior officer on HM Submarine Torbay, which carried out one patrol off northern Norway to shield an Artic convoy from German surface attack. Torbay also landed various types of agents and special forces in the Mediterranean and in Malaya. / My mother never said a single word about her war, but after her death, something prompted me to start asking questions. I found a clear link to French Section of SOE, explaining her intimate knowledge of the Beaulieu area in southern England, used as their training area, and for sending agents by air to France. / So I really appreciate your video, Helge. It is one thing to read of RDF in books, but quite another to see it in action, and using the original kit. I watch some of ww2historyhunter's videos, where he explores the many German bunkers. I could imagine radio kit such as yours in a museum in such a bunker. /

What a great video! I do like it when you include the technical breakdown of the radios with the diagrams of the circuits in use. Please keep making these videos. I cannot wait to see a video on the KlFuSpr.d “Dorette”.

Man you have a great collection of wartime gear. Bless the Norwegian Resistance members for their bravery in WW2. Love the accuracy of that loop antenna system.

This is so geeky - and I LOVE it!! ✌I did have a fairly good idea of how transmitters were located via triangulation but never exactly how it was performed IRL. Thanks for showing the procedure of utilizing such a unique and fascinating (in its time also highly feared) device of Nazi equipment. Considering how - understandably - HATED any Third Reich objects were in postwar Norway it's a miracle this device has managed to survive at all. Great and informative vid! 👍

Wow! This is amazing, it's one thing to see the equipment used, quite another to see it actually in working order.

That's some really gorgeous equipment

Thank you Mr. Fykse for this awesome demonstration. It is the things we interested, see in back grounds, in show cases and glass boxen these days. But a full demonstration of it in functioning is awesome to see and hold. So admirable and can't wait to see more of your content. Good luck, from the Netherlands.

beautiful to see such old equipment in use and somebody who is passionate about his hobby. Cool Video and greets from Germany.

great equipment awesome to see in this condition and that you know how to work and maintain it keep it up!

that is why a properly trained agent would send signal very short time, burst and change frequencies often to minimize detection, then when done change loaction/hide Transmitter, Antenna....

Another very interesting presentation by Helge again. Enjoying the entire process of WW2 DF for the first time. I used to be a radio operator in my military service and was not told about DF at all. Very surprised at the results.

Very intresting equipment,and deadly in right hands. Thank you for posting this.

Fscinating, both for the reenactment and the amound of original historical equipement you have, that's truly a great work keeping it running so good

Once I read a book "Kio ku mitsu" by Yu. Korolkov about work of soviet agent Richard Sorge in Japan during WW2 and those radiowars were described there, but I never knew, how exactly it worked. It was interesting to watch your video. I think YT recommended this video because of my little hobby of studying Morse code the last few weeks. Thank you for video! Radio is a great invention of mankind.

Vielen Dank für diese großartige, detaillierte Information und die viele Mühe, die Sie für uns aufgebracht haben. Das war sehr interessant!

Прекрасное видео! Великолепная коллекция старинной аппаратуры. Хорошо, что в наше время есть такие увлечённые люди. Привет из России!

He seems so happy detecting spies that scares me

That set looks almost exactly like the AN/TRD-1 we used in Korea until the late 1970s. It was replaced by later 1940's tube equipment, the TRQ-23. For manpack missions we got some other gear in the 80s, the TRQ-30. "Flash"operations to call out targets was done very very quickly.

Love the old radio gear! Would be great to use in Fox Hunting as we call it today. Thank you so much for the video. I recall when my Dad had Teletype equipment.

Thanks for the interesting video. It's remarkable that these electrical devices still work. 👍😎

best thing I've seen on KZfaq in a long time, thank you!

Amazing video and amazing to see this old equipment working. I look forward to watching more. I absolutely love the old radio stuff and this made my day. Great shack and working equipment/typesetter. Cheers! I wish I could spend a min in your shack just to enjoy your treasures and see them at work!

Fascinating! Thank you for the demonstration.

That was similar to the rdf unit I used in Vietnam to find the Vietcong transmitter.

fantastic collection and great presentation

Helge Fykse good presentation. I've known how this was done, but actually seeing the process was very informative. Thank You.

Fascinating video! Thank you for your time demonstrating this procedure

Fascinating. This is incredibly important historical documentary. Thank you sir!

Thank you for preserving radios, methods, and the history! GB ES 73 W3IHM

This channel is cool! Thank you from the USA!

Excellent demonstration. Thank you.

This is the fourth time I have watched you put this amazing restoration to work. Great presentation. Replicating this unit would make a great project.

felt real tension when you were opening the door of the suspected spy's house. Bravo!

Over a period of about 25 years, I worked long range (several thousand miles), medium range (out to 3000 miles), short range (under 3000 miles) and mobile direction finding. Long range DF could locate a target within a 10 nautical mile radius, medium range (I forget maximum radius) down to a 1500 meter radius, and short range, down to a 50 meter radius. Even with short range DF, it was usually necessary to use mobile DF equipment (vehicle mounted) to locate a transmitter antenna if it was not easily visible. Sometimes it was necessary to use hand held DF equipment to locate hidden antennas.

Amazing! Very interesting! Thank you for sharing this! I personally wouldn't have gone in there without my Luger P08 drawn :)

Really good video thank you so much sir for the explanation and demonstration! 😀😄

Beautiful peices of equipment.

Thank you very much for making this interesting video.

What a fabulous video. Even though as a UK radio amateur I have known of this DF technique for maybe 50yrs, I've never seen it demonstrated, and in such a well explained way too. Thank you. Have subscribed after seeing this excellent video. Regards Mark in the UK

Radio signal was a decoy, actual agent was that swan, waiting to report HQ 😊

Really enjoyed the demonstration.. Great job all around. I would like to have a DF box like yours to locate a jammer on 80m also. Thank you & good luck from Calif.

Hjertelig takk for din glimrende video med tidsaktuelle utstyr på begge sider. I am very impressed to see actual WW2 equipment as used on both sides. We do not see the use of the direction finder in roving detector vans and the "spy" breaks every rule in the spy manual. Leaving a carrier on and exposing a yagi antenna...puh-lease (: . This video, possibly dubbed to English, makes a fine introduction to the movie "A Call to Spy" (2019) where inexperienced amateur spies do make these mistakes in Vichy France 1940.

that was pretty amazing sir, thanks you very much! You have quite an astonishing collection of gadgets and contraptions.

I remember watching he movie 'The Heroes from Telemark' and wondering how true the movie-science was. I guess without having Kirk Douglas skiing past this is as good as I will know. Thanks.

Good result from the German point-of view, the "agent" was caught red handed. There were 3 main DF stations in Brest, Nuremberg and one other German city. When a signal of no German knowledge was encountered, the 3 DF stations were rung up "Achtung die Frequenz 3600 kilohertz" was told, and the 3 stations made the first DF-ing. Later more local stations "homed in" on the agent, the last stage could be the "Gürtelpeilgerät" which was carried under the jacket of the DF officer

Another fantastic video. It shows just how terrifyingly accurate these devices were. Plus the technology was made as simple as possible to use, so that many people could be trained in it's use. Great work Helge, 73 de DC4DC ... -.-

52m is 1 degrees? the result was maybe 8metres or 12 metres or 5 metres. so amybe 0.2 to 0.1 degrees. thats insane how fast they developed all that

So the Abwehr are still active in Norway 😁 An excellent demonstration Helge and amazing accuracy too. It is far better than any modern TDOA systems I have seen/used.

Fantastic job congratulations, very well preserved gear and good working conditions. 73

That is a real clever piece of equipment. No wonder they were so good at catching these agents.

It was better than Netflix. I love it. 73!

Man technology is amazing past and present 👍

The shape of the antennae provides wide band coverage, a form of Biconical Monopole

Very interesting video. I had no idea the German radio tracking gear was this precise for the time. This should make us all respect the brave souls who risked their lives transmitting vital information to the allies during the war.

Thank you for this great video. That antenna performance was exceptional.

Thanks for sharing this video and this antique equipment, very interesting!

That magnetic loop direction finder is the predecessor of the Delta-T time vortex antenna of the Montauk lore, just add a third horizontal loop around the middle.

cool that you have it still working and know how to use it

Fantastiskta prylar och historia, tack Helge!👍

Fantastic piece of equipment made by fantastic men. Thank you for sharing.

Very interesting presentation, with a story too. I have always been interested in RDF workings. It is a pity that my radio club does not have younger members to participate in foxhunts. I would love to have a go at it. Foxhunts remind me of being a child with a make-believe pirate treasure map. Thank you for such a good video.

tack så mycket för denna video! Riktigt intressant att lyssna på!

Very nice video Helge😊 tnx & 73

RYRYR printer reversals… R Y have complimentary bit values in the BAUDOT code so if you receive a series of R and Ys you know that each bit of the teleprinter is working correctly.

Very nice video! You are doing wonderful work to keep old technology alive into the future! I have used antennas that are euphemistically called “elephant cage”. I was surprised with the accuracy of a small, portable radio in your video example!

swan: "the human are doing something, i must report this to the leader"

5:49 THE AGENT IS RIGHT IN FRONT OF YOU!!!

Great sharing : Like 504 for you : I wish you a wonderful day

That's really neat, I love that you received your orders by teletype. My friends and I used to drive around town and track each other with our Citizen Band radios.