SAQ Grimeton Christmas Eve 2021 Transmission on December 24th
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- Опубліковано 20 сер 2024
- 08:25 CET (07:25 UTC): Live video from World Heritage Grimeton Radio Station begins
08:30 CET (08:30 UTC): Startup and tuning of the Alexanderson Alternator SAQ from 1924.
09:00 CET (08:00 UTC): Transmission of a Christmas message from SAQ.
WOW! Terrific video. I am so pleased to see my descendants keeping this technology alive. Our thoughts and prayers to all of you during these strange and trying times. 73 de KK5IM.
Magnificent. Thank you very much and best greetings from all of us at KET, the former Alexanderson station at Bolinas, California.
What a wonderful live commentary.
Thank you all for this wonderful video.
As a dxer, visited, Ekala Tx site, Sri Lanka, RVA site in Philippines, BBC site in Singapore, RTVM site in Malaysia and AIR site in Bangalore are nothing, compared to this UNESCO WHS. We too wish you the Merry Christmas 🎄 to you from India.
Wonderful to see this beast wind-up slowly into life and transmit to the world, Incredible that it is still all intact and operational. Some very hard work and dedication and no doubt a fare amount of financial support has gone into keeping it on the air. Not sure if I will ever hear it all the way down in New Zealand but next year I will tune in just in case the conditions are right. Regards and 73’s Kris Thompson
Sure they have put in money to restore it but I would believe that the people there are working for free in an association. 😊
It's pretty common in Sweden with enthusiasts working for just the pleasure of it.
Congratulations to the team, the association and all people involved! Every christmas a fun moment to watch and hear. 73 and God Jul to all !
Thank you Frederik and crew. Masterfully narrated. Nothing quite like hand sent Morse, the original digital code.
Thanks a lot for keeping this legend alive! This time I was actually able to receive the entire transmission near Stuttgart in Southern Germany very well, using a tuned ferrite antenna with selective preamplifier. Just finished manually decoding by using the Audio graph (I don't know Morse...).
I received the transmission very well. It was my first attempt to receive SAQ and I was very happy to hear the signals. Thank you for your work and have a nice Christmas for the SAQ team.
Magnificent! Well done gentlemen and Happy New Year!
Enjoyed every minute of the live broadcast! God Jul!! From Los Angeles.
Can't wait until xmas eve 2022. Ears are ON!
Beautiful machinery... I sincerely regrets those times where a radio was a radio and not an SDR computer, big power amps, huge antennas and a good radio operator... Now all this thing has gone with digital world, satellites, etc. 73 from ON6CV op. Eric (JO20SO).
That radio is more or less a giant tuned spark generator. Sparks were the first "radio" transmissions.
Start-up was very nicely commentated. I enjoy watching you start up and operate this wonderful station ! Merry Xmas !
Thanks for your efforts guys in Grimeton ! Could hear your signal near Dresden stable with VLF converter + Yaesu FT1000MP + Titanex Beam30/40m (which works for VLF for whatever reason:-) Local noise level was S4-S6, your signal around S8, so about 18 dB over the local noise here. Have a roofing filter in the FT1000 + 500 Hz filter in 1st IF stage + 500 Hz filter in second stage, 3 dB attenuator in front of the VLF converter. Merry XMAS to all !
I watched this video over the Christmas holidays, and started learning CW the next week! I've got just over half the alphabet learned so far.
Terrific to watch and appreciate the preservation of a fine bit of electrical/electronic history.......excellent video as always....Many thanks, W6KL
Thank you and Merry Christmas from Quonnie Breachway Charlestown RI USA.
Copied entire transmissions from startup to end of message. Equipment Wandell und Goltermann AT-611 Selective Level Meter 200 foot beverage antennas installed below high tide line over wet sand on south shore of Quonnie Salt Pond about a half mile in from the
ocean. 73 to all from Chris AJ1G Stonington CT
Thank you so much for making this video and helping to keep this part of history alive!
This 97 years old transmitter with alternator has a real WOW-factor! Ik hope that before the 100 year anniversary of SAQ the COVID-19-shitstorm has left the world so my friends and I can visit SAQ. I wish you all a happy Christmas and a healthy 2022!
--... ...-- -.. . .--. .- ..--- --.- -..- - - ..-
Thank you very much and Merry Christmas to all
Thanks for the views to this site. This time I did not receive. Last time, I used approx 20m of wire outside of window (in central Finland). Recording done using audio recorder, ie Zoom H5 (I do not have SDR that would go to VLF). 73 de OH7HMS.
This was very interesting to see. Thank you all for your efforts, and have a Merry Christmas!
simply great, a very interesting video, all the best, 73 dh1nai, harald
Great, I did not know what technic is beheind this old kommunication. Thanks. Greetings from Germany.
I've had a good reception in JO62OR, thanks a lot, and Merry Christmas.
Thanks for the broadcast for the Merry Christmas and Happy New Year 2022 SP2SAR
thanks for your work very nice action ....73 de SA2KHG Carlo ,North-Sweden
Thank you for the guided tour in this excellent machinery.Merry Christmas. 73 de sv1onk
tnx fer transmisson, rst 579 in JO51HK with IC-705, LW-converter and homemade frame antenna
73 de DL5ASG !
Impressive site! Thanx and Merry Christmas!
Seasons greetings from Brazil!
Fantastisch
Thank you for all yor dedication and hard work! I had planned on tryin to copy tonight the transmission. I did catch somenof the live broadcast on you tub .The transmission Would have been about 230 am in pittsburgh pa .Will try in july and next christmas. De n3vxt.
Parabéns a todos pelo belo trabalho que fazem. Aqui do Brasil 🇧🇷🇧🇷nosso reconhecimento.
Very interesting station. God luck in future!
Amazing!!!
Apasionante video !! Saludos desde Daireaux (BA) Argentina - LU4-EGG
Thanks for good job ! .
Thanks a lot for this video and those explanations! Merry Christmas to you all from Brittany.😁( Here, there is too much electricity noise to hear you by radio ( I tried a lot of times!) but happy to see your installation in this video. )
Christmas wishes to All
Was lisning on web sdr Twente signal S9 PD4WA
Better SAQ than DAB radio 👍
Good evening and happy Chrismas manny greetings from radiamatør oz5pet Peter Rasmussen Odense Fyen
I forgot to listen!
It's interesting to see how long it takes to get it running. I hadn't realised how long it takes.
That'd be a nice aerial system for Top Band.
No RG58 here.
G4GHB.
I tried but barely heard anything - rotatable Wellbrook loop and RSPdx receiver in IO92. I'll be listening for your next transmission.
Merry Christmas and a Happy New Year de M0SNR
Congratulation and thanks for your job!
(5/9 the audio here, but with loud hum in the announcer mike 😄)
Thanks to all 73 k9ut
Bonjour à tous ! , comme chaque année , japasse systématiquement .... à côté ! , Juste une petite observation , A vous tous qui donnait des infos de réception , quel dommage que vous ne précisiez pas à minima vos coordonnées GPS ou localisation approximatives !!!!!! 73's+ à tous et bon traffic
17 kHz transmitter, that means a wavelength of about 17 km!
Well done radiomen! VY 73
God Yule!
And who wants the other end of the spectrum, can build a DIY 480 000 GHz transmitter at home called Twibright Ronja. It has a faster "morse code", modulated at 10 Mbps full duplex BPSK. Released exactly 20 years ago, on Christmas 2001. I am just reading Grimeton is a UNESCO site!
Tnx Merry Christmas de PA1ALV
nice video. But one question why so early why not at 12.00 hrs then you havemuch more viewers.
Thanx anyway for this demonstration and to you also have a nice christmas and a happy 2022
Great video and info , i just happened to see this while on You Tube ! Very interesting and surprised all the equipment in such great shape ! I wonder how the station was used during the war (ww2) What frequencies can you transmit on ?
Also is this event held each year on Christmas or any other special days ? I am a Amateur Radio Operator (K9UT) living in Indiana ! Thanks for the Video and info, Good luck ! (Amazing station after almost 100 years ) Hope to hear the signals next time ! 73
Jerry; SAQ is transmitting on one frequency only; 17.2 Khz, as the radio wave is generated mechanically and the rotating alternator cannot produce any higher frequency. The transmitter was installed in 1924 and it was in operation 24/7 for several years. During WWII it was used to communicate with sub marines, as the low frequency allows the radio wave to be recieved under water, down to about 6 meters (18 ft). We are on air 2-3 times a year. See our website alexander.n.se and subscribe to our newletter and you will be noticed in time before any transmission.
//Fredrik / AlexanderSAQ
I understand the use of the alternator to generate the high frequency signal but this signal is then amplified by the magnetic amplifiers. How do these work? Do they chop DC power supplied to them based on the frequency of the driven signal generated by the alternator? So on side of the amplifier, there is the driving alternator signal and on the other side, there is the DC applied to the amplifier (which is then chopped)? Am I right?
... i kinda missed the whole thing :(
My goodness, you need a technical university degree to start that all up ;-). Merry Xmas and all the best for 2022 to all of you at SAQ vy 73 de PA5ABW, ex R/O merchant navy
starting up seemed to be rather easy, you just have to memorize the order of the steps, and if you dont - the alarm bell will teach you :)
(one day training if youre not a fool)
the engineering degree is required for the maintenance and repairs, and the knowing how and why this sequence is required, understanding what it means when a gauge shows something deviating from routine.
How is the continuous wave alternator keyed?
Dear Ken,
Here's how the keying of SAQ is done:
The keying of the continous wave from 64 separate windings in the Alexanderson alternator, each supplying 100V and 30A att full power, is made by two individual systems.
Primarily, the 100V signal is transformed up to 2000V in a transformer. This transformer also has a third winding in between the 100 / 2000 V windings. At key-up, 250V DC current is led throught this third winding, causing the amplification between the 100 / 2000V windings to be disrupted. At key-down the 250V DC current is cut off and full power will flow to the antenna.
Secondly, the tuning frequency of the antenna is altered at key up, by leading the antenna signal to a set of transductors and capacitor batteries. The transductors are oil-cooled iron cores, each with a winding for alternating current and a winding for direct current. The iron cores increase the inductance of the AC windings. When direct current flows through the direct current windings, the iron cores are saturated, which then loses their inductance-increasing capacity for the alternating current windings. In this way one can change the properties of an alternating current winding with a rather small direct current. So at key-up, 250V DC flows through the second winding causing the antenna tuning frequency to change from 17.2 kHz, resulting in that the power from the Alternator will not reach the ether. At key-down the 250V DC is cut off and now the antenna becomes tuned with the Alternator and the signal will go into the ether.
Both systems allow for a slight leak, approx. 10% of the power gets out in the air, which can be detected by listeners.
Where does the antenna current go during interruptions, there is no dummy load or similar device that takes care of the power? Some heat is developed in the transducers during key-up, but most of it "disappears" because the alternator simply draws less power from the mains. It is thus the supplying electricity network that takes care of the power variations. In today's situation, this is not a problem, but 100 years ago with the then weak electricity networks, it was an important factor to consider.
//Fredrik / Alexander Association
How I can get a diploma
Bor en kvart bort från Radio stationen :)
Fantastic!!!! d e LB8LG