N5J: Jarvis Island DXpedition
6:24
16 сағат бұрын
What is the Beam Width of My Moxon Yagi?
6:16
Have You Heard About a Quagi Antenna?
3:02
12 сағат бұрын
Learning a Bit About RTL-SDR Blog V4
3:47
14 сағат бұрын
The Beta or Hairpin Match for Antennas
2:58
Пікірлер
@MENSA.lady2
@MENSA.lady2 Күн бұрын
About that time I was using 6146B valves, or the mil spec version CV3523 if I could get them. I got similar results. G4JIU
@johnsonstechworld
@johnsonstechworld Күн бұрын
Thanks a lot for sharing your experience. Nice to meet old timers here! Hope to meet you on air some day. I am QRV on 40/20/15/10m, though not on a regular schedule. I am yet to work a G land station, though I have worked DL, ON, EC, IU, SP, 5B, mostly on 10m when the band was very active. 73 de Jon, VU2JO.
@MOBJihad
@MOBJihad Күн бұрын
Hello VU2JO. I also heard a little part of your callsign but unable to copy the full call. Hope to work you soon an ARISS. 73 S21MOB Jihad
@johnsonstechworld
@johnsonstechworld Күн бұрын
Glad to hear directly from you S21MOB. Looking forward to working you on LEO satellites soon. I am also trying AO-91, PO-101, IO-86, SO-121 and SO-50. But often I am not able to get contacts on those satellites. 73 de Jon, VU2JO
@vu2kocomprakash328
@vu2kocomprakash328 Күн бұрын
wow fantastic
@johnsonstechworld
@johnsonstechworld Күн бұрын
Many many thanks. Nice to know that you could copy S21MOB and he could also copy you. 73 de Jon, VU2JO
@johnsonstechworld
@johnsonstechworld 2 күн бұрын
Report of Debut Ham Radio Technical Discussion Net on 7065 kHz, 1:45 am UTC (7.15 am IST) johnsonstechworld.blogspot.com/2024/08/debut-ham-radio-technical-discussion.html
@EUROPAONTOP
@EUROPAONTOP 2 күн бұрын
73 de LZ1BWD
@johnsonstechworld
@johnsonstechworld 2 күн бұрын
Thank you. 73 de Jon, VU2JO
@kishor_VU2MZT
@kishor_VU2MZT 2 күн бұрын
Good excercise
@johnsonstechworld
@johnsonstechworld 2 күн бұрын
Yes! 73
@sc20910
@sc20910 5 күн бұрын
Great to know it’s done with Moxon! Also , curious about whether moxon is good compared to a circular polarized antenna for satellites?
@johnsonstechworld
@johnsonstechworld 4 күн бұрын
Good question! Circular polarized antenna is best for satellite (kzbin.info/www/bejne/monMmaGdeqeDhdk). Omnidirectional one is Eggbeater or its variant TPM, which does not need an antenna rotator. Cross Yagi is best, but needs a rotator (kzbin.info/www/bejne/sGWTnYd7l72ZkLc). Moxon Yagi is really meant for outdoor manual operation as it is very light weight. 73 de Jon, VU2JO
@W0CYC-HamRadioEndeavors
@W0CYC-HamRadioEndeavors 5 күн бұрын
Thanks for taking us along. It’s so fun to hear your side of the world! 73!
@johnsonstechworld
@johnsonstechworld 5 күн бұрын
Glad you enjoyed it! 73 de Jon, VU2JO
@W0CYC-HamRadioEndeavors
@W0CYC-HamRadioEndeavors 5 күн бұрын
@@johnsonstechworld Absolutely Jon. Always nice to hear you!
@johnsonstechworld
@johnsonstechworld 5 күн бұрын
73
@nursalekmimfahadmomo9719
@nursalekmimfahadmomo9719 6 күн бұрын
I am S21CRO. 😊
@johnsonstechworld
@johnsonstechworld 6 күн бұрын
Thank you very much. I will look out for you on ARISS passes likely to have you in footprint. There is one at 9.36 am IST today, but you may be at work! Hope to work you on ARISS soon. 73 de Jon, VU2JO
@charmcitytoe
@charmcitytoe 7 күн бұрын
Great job and prayers for a quick recovery. 💯
@johnsonstechworld
@johnsonstechworld 7 күн бұрын
Much appreciated on behalf of those at ground zero.
@sc20910
@sc20910 7 күн бұрын
Great idea, will like to join such a net
@johnsonstechworld
@johnsonstechworld 7 күн бұрын
Please do! There will be a preliminary trial on 7060 kHz at 6.30 am IST (UTC+5.30) today morning. 73 de Jon VU2JO.
@NgakpaW
@NgakpaW 7 күн бұрын
What a great idea! de AD0L
@johnsonstechworld
@johnsonstechworld 7 күн бұрын
Glad you like it! 73 de Jon, VU2JO
@abbyck
@abbyck 7 күн бұрын
This would be awesome
@johnsonstechworld
@johnsonstechworld 7 күн бұрын
Thank you. There will be a preliminary trial on 7060 kHz at 6.30 am IST (UTC+5.30) today morning. 73 de Jon VU2JO.
@CE3FJK
@CE3FJK 8 күн бұрын
spotting yourself will not work, as many have the cluster settings filtered by continent. if you think calling CQ for 15minutes is enough to call a band dead. well its dead for your antenna system and QTH. I have been able to made daily contacts on 10m since Jan - 2024. mind you, all CW, so for me It's wide open with a wire and 10 Watts.
@johnsonstechworld
@johnsonstechworld 8 күн бұрын
You are right one VU ham from North of the country has been able to have 10m contacts on CW recently. Yes, for my antenna system, 10m is not that good now! Nice to know that you are having regular contacts with a wire and 10 Watts. May I presume that it was out door operation? 73 de Jon, VU2JO
@Nayana-4S7NDR
@Nayana-4S7NDR 8 күн бұрын
I am also really happy that I could establish a QSO with you Jon. We will have many QSOs in the future. Thank you for the video :)
@johnsonstechworld
@johnsonstechworld 8 күн бұрын
Thanks a lot. 73 de Jon, VU2JO
@spirit_soul3708
@spirit_soul3708 8 күн бұрын
Damn, every time i hope on 10 meters its extremely dead. I hope it recovers soom.
@johnsonstechworld
@johnsonstechworld 8 күн бұрын
There are sporadic reports of activity on 10m. But we may have to wait till the end of September for a full recovery. 73 de Jon, VU2JO
@spirit_soul3708
@spirit_soul3708 8 күн бұрын
@@johnsonstechworld 73, KQ4SJM
@johnsonstechworld
@johnsonstechworld 8 күн бұрын
73
@spirit_soul3708
@spirit_soul3708 8 күн бұрын
@@johnsonstechworld I guess my comment didn't go through. Pretty sure it said "KQ4SJM 73"
@kishor_VU2MZT
@kishor_VU2MZT 9 күн бұрын
does it hairpin match really necessary ?
@johnsonstechworld
@johnsonstechworld 9 күн бұрын
May be when the antenna impedance is quite different from that of the feed line. 73 de Jon, VU2JO
@straightnochaser4878
@straightnochaser4878 9 күн бұрын
You are absolutely right. The narrower the diagram, the more difficult it is to guide the satellite. Such antennas assume the use of full duplex. If you do not hear the retransmitted signal, then the antenna with a narrower radiation pattern will lose in relation to a simpler antenna. I was convinced of this from my own experience. If you make DK7ZB I suggest trying to direct the antenna manually. You will be able to control the azimuth, angle and polarization quickly and effectively
@johnsonstechworld
@johnsonstechworld 9 күн бұрын
Thanks a lot for the suggestions. 73 de Jon, VU2JO
@flightstatic4662
@flightstatic4662 10 күн бұрын
Good catches!
@johnsonstechworld
@johnsonstechworld 10 күн бұрын
Glad you enjoyed it
@straightnochaser4878
@straightnochaser4878 10 күн бұрын
To work with this satellite, you need to use full duplex. You can use a couple of portable radio and a duplexer. For reception, I use a superheterodyne with a sensitivity of 0.16 μV. What to use for transmission is not important. I have 5 elements for transmission, 6 for reception. An open-sleeve yagi. With the correct orientation of the antenna, the retransmitted signal is slightly lower in audibility than on SO-50, but still quite strong
@johnsonstechworld
@johnsonstechworld 10 күн бұрын
Thank you for introducing open-sleeve Yagi. I am hearing that for the first time. Can you please post a bit more details and if possible, a video on your channel? 73 de Jon, VU2JO
@johnsonstechworld
@johnsonstechworld 10 күн бұрын
Did I hear a DX station towards the end of the audio clip, beyond 4:30 of the pass recording? It was a near overhead pass of International Space Station here and UHF side of IC 2730 showed even six segments of signal strength at TCA! A VHF repeater at 40km gives hardly one segment display on VHF with this antenna. That is the power of ARISS!
@johnsonstechworld
@johnsonstechworld 11 күн бұрын
Today I came across GAWANT designer JF1QHZ on X (x.com/JF1QHZ)! Nice to meet the innovator. First Saturday and Sunday of every month is celebrated as GAWANT Day (x.com/GAWANTDAY)! First GAWANT was made on 21st May, 2016. 73 de Jon, VU2JO
@garylester3976
@garylester3976 11 күн бұрын
HAM operators are rare in Costa Rica. I've only met one in decades of being in Central America. That was a lucky contact.
@johnsonstechworld
@johnsonstechworld 11 күн бұрын
So nice of you. I was quite happy to hear him loud and clear. Glad to know that you are from Central America, very near to TI2CC! 73 de Jon, VU2JO
@garylester3976
@garylester3976 11 күн бұрын
@@johnsonstechworld Yeah, that was hard to hear with all the static, but sounded like maybe an American. The HAM operator I met about ten years ago was a Tico named Caesar, and sold fish from a truck up in the mountains between San Vito and the Panama Border area. And a like able person. I'm not a HAM, but was a Navy Radioman, Have a Son thats a HAM in Oregon, and I am working towards moving back to the US, and planning on getting into it. Had a friend pick up a used Kenwood a couple months back for me, but I dont know if it needs repair etc. and will be awhile before I can get there. I'm planning on living as an Overlander, and setting up mobile HAM, in whatever vehicle I get as a hobby in remote camping areas. Its been something I wanted to do for decades. I've been a short wave listener since I was a kid, but now my last reciever dead from humidity and momentary contact on/off switch. Those switches die on everything in the tropics, and no decent quality recievers available here. Hopefully get moved back to US soon, and get booted up... Nice hearing from you!
@johnsonstechworld
@johnsonstechworld 11 күн бұрын
Hope you will get back US soon and come up on the air. 73
@garylester3976
@garylester3976 11 күн бұрын
@@johnsonstechworld Thanks for the good wishes! cant hurt!
@johnsonstechworld
@johnsonstechworld 11 күн бұрын
73
@LB4FH
@LB4FH 12 күн бұрын
Interesting that you felt it so far south too 😯 Space WX has surely been active this year
@johnsonstechworld
@johnsonstechworld 12 күн бұрын
Yes. That was the first major radio black out I faced after coming on air with FT-710 in January 2024. 73
@RajeshA
@RajeshA 12 күн бұрын
🏁
@johnsonstechworld
@johnsonstechworld 12 күн бұрын
🙏
@Ei2iP
@Ei2iP 13 күн бұрын
Noise is a killer on HF
@johnsonstechworld
@johnsonstechworld 13 күн бұрын
Certainly. Most of the time I have near S9 noise, except on 10m with S2-3 noise. But 10m is dead for me from the second half of May 2024. Some of my friends in rural areas still enjoy S2-3 or even lesser noise on 40m. 73 de, Jon, VU2JO
@RajaramSrinivasan59
@RajaramSrinivasan59 13 күн бұрын
Thanks for your really good videos. What time does Stan give reports? 73
@johnsonstechworld
@johnsonstechworld 13 күн бұрын
Stan is usually there around 5.30 pm IST. Even though his signal is not that strong here, I hear stations from Central and North India as well as Bangladesh stations calling him very well. On listening carefully we can hear him as well. 73 de Jon, VU2JO
@W0CYC-HamRadioEndeavors
@W0CYC-HamRadioEndeavors 15 күн бұрын
Another informative video my friend. You should try the Preamp I use for the UHF downlink satellites. It will wake up the 2730 and you will hear SO-121 so much better! SHF Elektronik Mini 70, made in Germany. 73!
@johnsonstechworld
@johnsonstechworld 15 күн бұрын
Thank you very much for the suggestion. As I have only one radio, using a pre-amp will mean adding a switch to bypass it during TX. I am yet to familiarise myself with connecting PTT to another device and switch with relay etc. Anyway, it is there on my wish list. 73 de Jon VU2JO.
@W0CYC-HamRadioEndeavors
@W0CYC-HamRadioEndeavors 14 күн бұрын
@@johnsonstechworld the preamp I’m using that I recommended is auto switching. All you would need is a short piece of coax and a 12 V DC power supply.
@johnsonstechworld
@johnsonstechworld 14 күн бұрын
That is really interesting! Preamp bypasses itself in transmit mode when PTT is pressed, without need for any connection from the PTT circuit?
@nealbeach4947
@nealbeach4947 15 күн бұрын
Settle down people. Its the solar maximum. I've been doing this for 50 years. It happens.
@johnsonstechworld
@johnsonstechworld 15 күн бұрын
Thanks a lot for the pacifying words from an old timer! Though I started off 40 years back, came on 10m only this year. In my initial days I had only 40/80m homebrew and it was sunspot low time soon after I started. Learning 10m with my new FT-710 now. Waiting for summer doldrums to settle and winter anomaly (kzbin.info/www/bejne/pHWxcqigiJVqqKssi=dkW5sPt8T9Az1nqZ) to improve 10m. 73 de Jon, VU2JO
@johnsonstechworld
@johnsonstechworld 15 күн бұрын
Error noted: Wire length after shortening was 10m and not 20m.
@KC0JH_HAMateur_Radio
@KC0JH_HAMateur_Radio 16 күн бұрын
I cannot wait to get my 710 field out and about. Actually made my first DX contact on it from home this evening. S51DX in Slovenia! 73, Jon!
@johnsonstechworld
@johnsonstechworld 16 күн бұрын
Great job John! Hope you will have a nice time with it outdoors. 73
@paulswift700
@paulswift700 16 күн бұрын
Yes I agree with you. See later
@johnsonstechworld
@johnsonstechworld 16 күн бұрын
73
@paulswift700
@paulswift700 16 күн бұрын
Yes I would love to hook up with on the HF bands some day. Look out for me on 17m. De HS0ZLQ.
@johnsonstechworld
@johnsonstechworld 16 күн бұрын
May be when 10m wakes up in October or later during Winter Anomaly! 73
@PetrBelohoubek-ot5ok
@PetrBelohoubek-ot5ok 17 күн бұрын
That is just SDR on FPGA....
@johnsonstechworld
@johnsonstechworld 17 күн бұрын
Thank you. There are some even in our region who use it along with a linear amplifier with very good signals on the air. 73 de Jon, VU2JO.
@PetrBelohoubek-ot5ok
@PetrBelohoubek-ot5ok 16 күн бұрын
@@johnsonstechworld I mean, sure, it's great when you want to learn Verilog, and mess with SDR on the hardware level, but you can achieve the same with ESP32, which is waaaaay cheaper ;-) (but I'm not sure, if its able to transmit, It may not, or most likely can, but its pretty poor signal)
@johnsonstechworld
@johnsonstechworld 16 күн бұрын
Thank you for the new information. May be those experimenting with Radioberry will be more interested. 73
@todd.mitchell
@todd.mitchell 17 күн бұрын
I've barely been able to work RBN on 10m but my (paper) log still looks like it did around 1980. Almost all DX. Running 100W & dipole here in MN. TNX ES 73 DE NØIP
@johnsonstechworld
@johnsonstechworld 17 күн бұрын
Nice to know that you are also a fan of 10m. Hope it will wake up after September when they say that MUF will go above 28 MHz (kzbin.info/www/bejne/pHWxcqigiJVqqKs). 73 de Jon, VU2JO
@michaelwalsh7846
@michaelwalsh7846 17 күн бұрын
Yes band dead , occasional short lived weak sporadic E in the UK, nothing at all today! I check the band by tuning to 27555, the Italians are shouting continually , if I hear them then thats my indicator that there is a chance for an opening on 10, if not then there is nothing on 10m!
@johnsonstechworld
@johnsonstechworld 17 күн бұрын
That is a good piece of information. 27555 should be Citizen Band? 73 de Jon, VU2JO
@michaelwalsh7846
@michaelwalsh7846 17 күн бұрын
@@johnsonstechworld yes sir! This was a year ago from South Spain on my portable World class Belka DX.kzbin.info/www/bejne/Y4SlhISVgpeosJIsi=A2wUJa_BNmA5PkJB
@johnsonstechworld
@johnsonstechworld 17 күн бұрын
I saw that video just now. Wonderful performance of a small radio with a telescopic antenna! 73
@michaelwalsh7846
@michaelwalsh7846 17 күн бұрын
@@johnsonstechworld yes there is nothing like it, the weakest signal it can detect is -138db, the tuning ,selectivity, agc , sensitivity can not be faulted I have a Techsun 660 and a copy of the Malahite chinese radios, these are now not used, all this on a telescopic antenna, what my Icom pro hears on end fed 20m wire so does this beauty on the telescopic, it is like having your table top HF set in your pocket! There are glowing reviews on the net, its hand made by Alex in Belarus direct from him, others sell it at inflated price !UK price about £120, I ordered another 2 months ago latest model with MW, but Alex refunded my money as the customs at his end think it's some kind of coding or other device for the Russian war, he needs other paperwork now.Your audio on your video is superb by the way! Regards Mike g1zyx
@johnsonstechworld
@johnsonstechworld 17 күн бұрын
Thanks for the nice compliment on my audio! 73
@anilbhanot7105
@anilbhanot7105 17 күн бұрын
That was great, VU2TIJ
@johnsonstechworld
@johnsonstechworld 17 күн бұрын
Hope to hear you on LEO satellites soon. I think I have not heard anyone from your state on LEO satellites. I have heard VU2TIW on HF a few times on 20m and 40m. 73 de Jon, VU2JO
@rw3m
@rw3m 17 күн бұрын
GA OM! I think, strong solar CMEs activate the D-layer of the ionosphere, which strongly absorbs HF, especially during the day. “10 Meters” is a daytime band, so this influence is very strong there.
@johnsonstechworld
@johnsonstechworld 17 күн бұрын
Thanks a lot for a new explanation. 73 de Jon, VU2JO
@paulswift700
@paulswift700 17 күн бұрын
Yes I agree with. Some two months ago 10m was the hot band for DX. Now it's very quiet at any time of the day. Now it's 20m being the hot band. I've had several contacts in to England from here in Thailand. Dr HS0ZLQ, G0MIH.
@johnsonstechworld
@johnsonstechworld 17 күн бұрын
Thank you. Glad to know that you are in Thailand now. May be we can contact on HF some day. Currently I have taken down my 40 to 10m EFHW for mounting my Moxon Yagi for LEO satellite operations. So I am not there on 20m. 73 de Jon, VU2JO
@ivandubinsky1857
@ivandubinsky1857 18 күн бұрын
Yes, 10 meters has been very poor lately. I live on the west coast of Canada.
@johnsonstechworld
@johnsonstechworld 18 күн бұрын
I was talking to another 10m enthusiast in this region over phone and he told me the same. 73 de Jon, VU2JO
@george-ev1dq
@george-ev1dq 18 күн бұрын
was buzzing 6 months ago, dead as a dead thing now as is 11 metres
@johnsonstechworld
@johnsonstechworld 18 күн бұрын
Exactly same observation here. 73 de Jon, VU2JO
@terryparker1694
@terryparker1694 18 күн бұрын
Nearly constant CME`s and flares have created blackout conditions throughout the HF band. There is limited DX activity at night on 40 and 75 meters. ssn it at 164. NOT at cycle 25 peak. See Solarham for more facts and less drivel.
@johnsonstechworld
@johnsonstechworld 18 күн бұрын
Thanks a lot. 73 de Jon, VU2JO
@mewrongway
@mewrongway 18 күн бұрын
Wow I made contact with Japan from USA just a few days ago using a Xiegu G106 and a Vertical on 28.355.
@johnsonstechworld
@johnsonstechworld 18 күн бұрын
You are quite lucky! May I presume that it was an SSB contact from the frequency you used? 73 de Jon, VU2JO
@mewrongway
@mewrongway 18 күн бұрын
@@johnsonstechworld Yes John I was quit lucky, Yes SSB. Last time I got Japan was 1984. That was on a HR2510.
@johnsonstechworld
@johnsonstechworld 18 күн бұрын
Great!
@chrisspeakman7215
@chrisspeakman7215 18 күн бұрын
Yep they all are , 40 , 20 , and 15 meters all gone . I got my ham Class A license in the early 80's and at that time H.F. radio was buzzing , there were so many broadcast stations , hundreds day and night . Ham bands were in constant use . O.K. this was before the end of the cold war and the beginning of the internet . But it's more than that . There are still some S.W. Broadcasters But H.F. Conditions here in the U.K.today and recently are usually very poor too none . I think the ham radio community is in total denial . It's not the lack of Ham radio operators on H.F It's the lack of H.F. propagation . Somehow we managed to kill the Ionosphere F1 layer F2 layer all gone . Sorry to have to say it but most days here in the U.K. H.F. radio is mostly just STATIC NOISE ! 80 meters at night 20 or 15 during the day All gone .thanks for the video DE G4MXC
@johnsonstechworld
@johnsonstechworld 18 күн бұрын
I can't agree with you more. Same situtation here! I could work a lot of DX on CW with homebrew radio in late 1980s. Now with commercial SSB radio, I have not been able to work DX for the past one month. Noise level is quite high most of the time. 73 de Jon, VU2JO
@terryparker1694
@terryparker1694 18 күн бұрын
"We" have done nothing. It's totally the Sun. Solarham has more.
@johnsonstechworld
@johnsonstechworld 18 күн бұрын
Thank you. 73
@johnnorth9355
@johnnorth9355 18 күн бұрын
10 meters will come back from September onwards - peak summer is always quiet so hang on in there. I also use 11m CB and the same applies. Propagation is of course a different issue from the slow decline of amatuer radio in general. As more megawatt with beam users shout across the airwaves the real hams interested in using conditions rather than power technology to make qso's tend to decline in proportion. This trend is exactly what governments want as they reclaim bandwidth for commercial use. 73 M7BLC / 26CT3775.
@johnsonstechworld
@johnsonstechworld 18 күн бұрын
Waiting for 10m to come back! I am unable to get any DX contacts now except for an occasional one on LEO FM satellites. 73 de Jon, VU2JO.
@user-bw6vn8xm7i
@user-bw6vn8xm7i 18 күн бұрын
😃👍👍 VU3 RFN
@johnsonstechworld
@johnsonstechworld 18 күн бұрын
🙏🙏🙏
@hagei406
@hagei406 19 күн бұрын
Same observation here. I look over 10m every day , as i am doing intruder watch . Just some local noise and nothing ... Hence there was good Sporadic E this week in Europe on 6m .
@johnsonstechworld
@johnsonstechworld 19 күн бұрын
May be 10m will open well by October! 73 de Jon, VU2JO
@hamradioonthego
@hamradioonthego 19 күн бұрын
Great video. I operate 10m mobile with a CB type mobile antenna. I notice it also works well on 2m. Test your antenna on an Analyzer if you have access to one. A tuner will also work, if not listen listen listen on other bands and test on low low power. You might get more use out of your antennas. Great video again. 73
@johnsonstechworld
@johnsonstechworld 19 күн бұрын
Thank you for the suggestions! Currently I do not have an antenna analyzer, though a nanoVNA has been on my wish list for quite some time. 73.
@hamradioonthego
@hamradioonthego 19 күн бұрын
@@johnsonstechworld nano vna are great with plenty in such a small package and a great price. I had one sold it and was able to purchase a used MFJ-259.
@kishor_VU2MZT
@kishor_VU2MZT 19 күн бұрын
🤩
@johnsonstechworld
@johnsonstechworld 19 күн бұрын
🙏🙏🙏
@KE8ODY-WV-Ares-Ham-Dad-3O4
@KE8ODY-WV-Ares-Ham-Dad-3O4 20 күн бұрын
Resolution go higher than 800
@johnsonstechworld
@johnsonstechworld 20 күн бұрын
Thank you.