An easy hand-held dual band 2 m/70 cm yagi satellite antenna for working the SO-50 and other FM amateur radio satellites. For more information: www.amateurradi...
Your tape measure Yagi had become a hit in this region. VU2TEK was heard with this antenna on satellite about 5000 km away in Bali, Indonesia! I am planning to try one out. 73 de Jon, VU2JO
Great tutorial! I have used an old uhf aerial taken down when the digital era came to life in the UK. Used all the old elements ( with length to spare : 450 mhz) ) and followed your measures.Looks factory made , works a treat and cost me 0!!! Thank you.
I am 32 and just started working on getting my ham ticket. have watched your most of your video's are there vary informative. thanks for posting the videos.. and may be some day ill hit you up on the radio..
Hi, Dave, I am a member of the Wireless Institute of Australia and as a professional physicist, I did intensive research on antennae and various applications. I find your program interesting and will follow your instructions in building an antenna of your description for the use of AMSAT. Thank you for your kind contribution.
Love your videos an your personality. I know your goal was to make this portable but I have two suggestion. one, make the handle end longer so you can tuck it under you armpit for leverage and stability. two make the boom out of pvc pipe. this would give you a place to store the elements for travel like back packing. just some ldeas I had while watching.
I built a similar antenna a few years back. not placing plastic or rubber tips on the element ends CAN lead to coat hanger impalement. luckily nothing major (artery or major vessels) was penetrated in my forearm. Explaining, tobthe nurse, what my project intentions were was a little entertaining.
I am going to take my licence, been playing with SO50 for a few weeks with a mate of mine from Macclesfield Radio Club, just had a field weekend in Brandside, if I had known you were into it I would have given you a shout! I will add you on Facebook.....
The bird is on a polar orbit and tumbling i think in a right hand motion. similar to the NOAA LEO birds. Also you have to account for doppler shift as it passes by I think SO-50 has a 15 minute window? It is abit tricky to work a bird especially if you have alot of trees in your yard and nosy neighbors.
Nice!!! Im going to build on of these...just got my tech license and getting ready in June to start on my General....just a thought..why not take a "bracket" and drill and tap it for a camera tripod mount! one guy really easy to operate for sats....KEEP UP THE GREAT POSTS!!! KD2ICI.. Dan..
I hit the SO-50 and a couple others with a counterfeit Nagoya NA-771 and NA-774 for $2 on eBay. I knew they were counterfeit, but, couldn't afford authentic's at the time. However, counterfeits are not always bad.
Enjoyable video as always! One note about working SO-50: I find I am having to rotate my handheld Elk log periodic dual band beam between 0 and 180 degrees during most passes as the polarity changes during a pass...you might try that as a way to improve both up and down links as required....73 de AA5FR
I made this last year, and when adjusted and tuned it's great. I use mine on a tripod with a pvc 3 foot mast, and can lock it down for repeater work. Has anyone figured out the gain on this antenna? I would appreciate knowing that, soo much.
Dave, would like to see a home made weather satellite Omni-directional antenna for 2 meters in order to receive and print out weather satellite images.
Hello Dave: Thanks for making a complicated subject very down to earth (no pun intended) I like the idea of doing Satellite in the near future. I would like to ask if you can do a video or series of videos showing how to use the various MFJ antenna test equipment. In my case in particular, I got an MFJ antenna bridge Mod # MFJ-204B and after reading the instructions I get it, but when I go outside I get a bit lost. My antenna bridge has a meter showing impedance from 0 to 100 in the scale, other similar bridges show SWR. To my understanding I need to have an impedance of 50 ohms or as close to 50 ohms to have a match. The question is: When cheking the impedance, my meter should show a "dip" when the resistance knob is at 50 ohms or indicate 50 ohms? Dip or 50 ohms? I guess I am a visual guy and the only video shown here in youTube is from Brazil, my Portuguese is rough. Can you help us all? Now I will be working on installing my HF vertical 5BTV and in the car a Comet UHF-VHF and 6m plus the 10-15-20-40m coils. Thanks 73 de N2JKW Javier.
sorry! I would like to realize this antenna but I don't understand your Language very well so may you add a little drow with dimension of the antenna in meter or cm ? thank you
I have followed your instructions concerning measurements and layout but instead of the coat hangers I have used 1\ 8" steel rods. Can you please explain how to tune (trim) this antenna? I have a MFJ 269 PRO that I will be using to test swr. Do you tune the 2m and the 70cm separate then reassemble? Any additional information you can give would be appreciated. 73 KC3ELU
Dave, I love this design but what i am wondering, can this be made with tape measure elements as well whilst still keeping all the same dimensions? ZF1DM
Thank you for your nice videos about antennas. I have a question, could you contact the ISS with this antenna? I see that someone asked for an specific antenna to contact the ISS, but I think this one could work. BR
Hi Dave interesting video, I would have thought the impedance of the dipoles with all this parasidic elements around them would have dropped to about 20 ohms, am I missing something here as the vswr seemed ok, and isn't there any interaction between the 2 antennas....Fred UK g4vvq.
Zeb Smith Hi Zeb, yes should be about 10 ohms I would have thought, wonder why the vswr is so good, defies the rules of logic hi...name is Fred here not Tom, don't ask hi....
Clifford Novey Hi Zeb, well you need to increase the impdance a hec of a lot, there are several ways, you can use a folded dipole, they are 300 ohm, and with several elements around them comes right down to where you want, or a Hairpin, or Gamma Matcher, you can google all these things...Fred uk
Hello Dave, I'm going to use your plans to build this antenna tomorrow, except that I will use 1/8th Inch Stainless Steel rods instead of steel coat hangers. will I have to have different spacing/lengths on/between the elements? I don't have equipment to tune the antenna if this is so.
I have the same question, i get sir of 1.4: on the 70 cm and 1.6:1 on the 2 meter but I cant receive anything. I get some (still poor) reception with my rubber duck antenna 73, Va3epm.
When you're building these antennas, where do you get your starting point measurements from given some of the boom lengths and spacings you use. Is it just by trial and error or do you have a specific formula for assigning those spacings?
Works like a charm, the length has to be little bit longer at the (F), both 2m and 70cm but the spacing is 2 cm were the coax goes. tested to open couple repeaters, 2 m is approx. 40km from me and 70cm is around 10 km, no problems at all. Thanks to Dave for very good video. 73 de SM2WGV
Dave, thank you for publishing measurements in centimetres!
As an American who uses the imperial system at work on a daily basis, I will say that the metric system is a superior system of measurement.
Your tape measure Yagi had become a hit in this region. VU2TEK was heard with this antenna on satellite about 5000 km away in Bali, Indonesia! I am planning to try one out. 73 de Jon, VU2JO
Great tutorial! I have used an old uhf aerial taken down when the digital era came to life in the UK. Used all the old elements ( with length to spare : 450 mhz) ) and followed your measures.Looks factory made , works a treat and cost me 0!!! Thank you.
I am 32 and just started working on getting my ham ticket. have watched your most of your video's are there vary informative. thanks for posting the videos.. and may be some day ill hit you up on the radio..
Hi, Dave, I am a member of the Wireless Institute of Australia and as a professional physicist, I did intensive research on antennae and various applications. I find your program interesting and will follow your instructions in building an antenna of your description for the use of AMSAT. Thank you for your kind contribution.
Best antenna guru on youtube!
I really enjoy your videos, good stuff Sir!
Love your videos an your personality. I know your goal was to make this portable but I have two suggestion. one, make the handle end longer so you can tuck it under you armpit for leverage and stability. two make the boom out of pvc pipe. this would give you a place to store the elements for travel like back packing. just some ldeas I had while watching.
I built a similar antenna a few years back. not placing plastic or rubber tips on the element ends CAN lead to coat hanger impalement. luckily nothing major (artery or major vessels) was penetrated in my forearm. Explaining, tobthe nurse, what my project intentions were was a little entertaining.
This cheap antenna is simply amazing. From Northern England I am working stations all over Europe with great signal reports on SO50 :-)
I am going to take my licence, been playing with SO50 for a few weeks with a mate of mine from Macclesfield Radio Club, just had a field weekend in Brandside, if I had known you were into it I would have given you a shout! I will add you on Facebook.....
this video's super inspiring. I built a yagi years ago by it and am keen to do it again. thanks! -KK6VXX
I just put this beast together myself, thanks for the video!
Your videos are fantastic but I wish you'd post High-Def. ;) It would be easier to see the finer details.
Thanks for sending me over to this video Dave. I think I'm gonna try something like this to use with my lost model tracker!
I would have expected the lengths to be as you described using steel (iron) elements due to the properties of the material. Nice video, thank you.
The bird is on a polar orbit and tumbling i think in a right hand motion. similar to the NOAA LEO birds. Also you have to account for doppler shift as it passes by
I think SO-50 has a 15 minute window? It is abit tricky to work a bird especially if you have alot of trees in your yard and nosy neighbors.
Nice!!! Im going to build on of these...just got my tech license and getting ready in June to start on my General....just a thought..why not take a "bracket" and drill and tap it for a camera tripod mount! one guy really easy to operate for sats....KEEP UP THE GREAT POSTS!!! KD2ICI.. Dan..
I hit the SO-50 and a couple others with a counterfeit Nagoya NA-771 and NA-774 for $2 on eBay. I knew they were counterfeit, but, couldn't afford authentic's at the time. However, counterfeits are not always bad.
Another nice video Dave. I thought the antenna needed to be circular polarized but apparently not. I presume your transmit was QRO, 5w.
Enjoyable video as always! One note about working SO-50: I find I am having to rotate my handheld Elk log periodic dual band beam between 0 and 180 degrees during most passes as the polarity changes during a pass...you might try that as a way to improve both up and down links as required....73 de AA5FR
I made this last year, and when adjusted and tuned it's great. I use mine on a tripod with a pvc 3 foot mast, and can lock it down for repeater work. Has anyone figured out the gain on this antenna? I would appreciate knowing that, soo much.
thank you for the centimetres, i see lots of cool US make stuff videos but in inches
Just multiply with 2.54.
Dave, would like to see a home made weather satellite Omni-directional antenna for 2 meters in order to receive and print out weather satellite images.
Hello Dave: Thanks for making a complicated subject very down to earth (no pun intended) I like the idea of doing Satellite in the near future. I would like to ask if you can do a video or series of videos showing how to use the various MFJ antenna test equipment. In my case in particular, I got an MFJ antenna bridge Mod # MFJ-204B and after reading the instructions I get it, but when I go outside I get a bit lost. My antenna bridge has a meter showing impedance from 0 to 100 in the scale, other similar bridges show SWR. To my understanding I need to have an impedance of 50 ohms or as close to 50 ohms to have a match. The question is: When cheking the impedance, my meter should show a "dip" when the resistance knob is at 50 ohms or indicate 50 ohms? Dip or 50 ohms? I guess I am a visual guy and the only video shown here in youTube is from Brazil, my Portuguese is rough. Can you help us all? Now I will be working on installing my HF vertical 5BTV and in the car a Comet UHF-VHF and 6m plus the 10-15-20-40m coils. Thanks 73 de N2JKW Javier.
Hello Dave! I like your videos very much. Would you please enable automatic closed captions on this one. It helps me to understand better. Thanks!!
Thanks for the information. i follow the instructions and now i have my satellite antenna. . KP4TPL
sorry! I would like to realize this antenna but I don't understand your Language very well so may you add a little drow with dimension of the antenna in meter or cm ? thank you
I fancy giving this ago but why is the coax attached to only the 70cm side or am I having a moment? looks good anyway like his passion 👍
I was wondering if it made a difference I’d we attaché the coax to the 70 cm side or the 2 m side (I know the bolts connect to both)
" whos zed?" "zeds dead baby".. vroom
I have followed your instructions concerning measurements and layout but instead of the coat hangers I have used 1\ 8" steel rods. Can you please explain how to tune (trim) this antenna? I have a MFJ 269 PRO that I will be using to test swr. Do you tune the 2m and the 70cm separate then reassemble? Any additional information you can give would be appreciated. 73 KC3ELU
Hello Dave, Is it possible that you could do a video on a hairpin tuning match? Also how to for a balun?
Thanks
I need to try this!
So I’ve built the antenna does the Amsat site give frequencies or are they found elsewhere? Thanks! -73- W1KPS
Hi, I'd like to have a go at this. I'm in the UK does it matter what gauge of steel the coat hanger is? Thanks.
Great video! Thanks! By the way, who is playing that awesome harmonica on the song in the opening??
Do the different bans interfere with each other?
Would it be more optimal to have them separate or is it the same
Dave, I love this design but what i am wondering, can this be made with tape measure elements as well whilst still keeping all the same dimensions?
ZF1DM
any need for a hairpin match and or high pass / low pass filters for the VHF and UHF signals on the same feed line?
Thank you for your nice videos about antennas.
I have a question, could you contact the ISS with this antenna?
I see that someone asked for an specific antenna to contact the ISS, but I think this one could work. BR
For a future video, how about making a folded dipole for 2m?
Should not the vhf and uhf be at 90 degress?
Thanks Dave. Another great vid.
Congratulations for the nice vídeos, best 73's de PY3YD
Hi Dave interesting video, I would have thought the impedance of the dipoles with all this parasidic elements around them would have dropped to about 20 ohms, am I missing something here as the vswr seemed ok, and isn't there any interaction between the 2 antennas....Fred UK g4vvq.
That's exactly what I was thinking, Tom. I'm wondering how it works without any kind of impedance matching.
Zeb Smith Hi Zeb, yes should be about 10 ohms I would have thought, wonder why the vswr is so good, defies the rules of logic hi...name is Fred here not Tom, don't ask hi....
Zeb Smith
How would one match the impedance of this build? What materials and methods? Thx-
Clifford Novey Hi Zeb, well you need to increase the impdance a hec of a lot, there are several ways, you can use a folded dipole, they are 300 ohm, and with several elements around them comes right down to where you want, or a Hairpin, or Gamma Matcher, you can google all these things...Fred uk
Tom Smith
Great info thank you.
This is sign of real ham
Hello Dave, I'm going to use your plans to build this antenna tomorrow, except that I will use 1/8th Inch Stainless Steel rods instead of steel coat hangers.
will I have to have different spacing/lengths on/between the elements? I don't have equipment to tune the antenna if this is so.
I have the same question, i get sir of 1.4: on the 70 cm and 1.6:1 on the 2 meter but I cant receive anything. I get some (still poor) reception with my rubber duck antenna 73, Va3epm.
What were the measurements after you made the trimming of the elements?
Thanks for another great video! I was surprised and pleased to see I could make an antenna of this nature for such a low cost. 73 de KD0YVV
Very, very cool...thx Dave.
out there in the rain it looks like he just might find out what ben franklin experienced with the kite!
Does anybody know what grade of cable and connector is needed to connect this antenna to a baofeng radio?
can you make a very basic video how this antenna works please
Dave, I would like to see you build an eggbeater antenna.
Could I use copper wire instead coat hanger? please help, 73's 9A3DSU
Well done! Guess what I'm going to be doing this weekend!?! :-)
Awesome video sir!
Can you build a 160 and 80 meter dipole? Donovan Hill 73s
One Point Twenty One Jigawatts ,, GREAT SCOTT MARTY WHAT WAS I THINKING ??!!
When you're building these antennas, where do you get your starting point measurements from given some of the boom lengths and spacings you use. Is it just by trial and error or do you have a specific formula for assigning those spacings?
Sir , how many watts can I use on this antenna?
Thanks!
How did you get your coat hangers so straight?
Is it for transmitting or receiving or both?
Great video.
BRAVO DAVE...
Why don't you only work in metric? The whole world does. You talk about the 2 metre band and then measure your aerials in inches.
Great video.....
Fine Projekt... Tnx es 73
Please automatic translation RUclips thank you so much................................merci
Many Thanks! ;)
What about cooper wire?
I'm building just one and I really don't think the SWR are far a way, have all done, wires and boom, now I need the screws. 73 de SM2WGV
Nice, have test on it and shere results here.
73 de Z31VAJ :)
Tested with 1mm copper wire, swr went crazy, couldn't match it, bought 2.5 mm aluminium tig wire so new info soon
Yes ! I made also from 2,5mm copper wire. SWR was so high. That was the reason i asked here ;) 73
Works like a charm, the length has to be little bit longer at the (F), both 2m and 70cm but the spacing is 2 cm were the coax goes. tested to open couple repeaters, 2 m is approx. 40km from me and 70cm is around 10 km, no problems at all. Thanks to Dave for very good video. 73 de SM2WGV
You shod make an antenna to talk to NA1SS
moxon antenna dude
👏👏👏👏👏👏👏👏
yi1hra
Does anybody know what grade of cable and connector is needed to connect this antenna to a baofeng radio?
Great video.