Ham Radio Mystery Antenna: Was This $5 Flea Market Find Worth It???

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SevenFortyOne Radios and Repairs

7 ай бұрын

I picked up a $5 mystery Ham Radio antenna at a recent ham fest (ham radio flea market). Do you think this was a decent find or should I scrap it?
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Пікірлер: 64
@bb_37
@bb_37 7 ай бұрын
The 6m repeaters you were trying probably had vertical antennas. Your horizontal antenna would have about 18 dB of loss when trying to work a station with a vertical antenna.
@SevenFortyOne
@SevenFortyOne 7 ай бұрын
Good point! I didn't think of that. I'll have to change the polarity and try again
@Siskiyous6
@Siskiyous6 7 ай бұрын
In no way can you lose getting that much metal for $5.00. I usually convert yagis to traditional dipole drivers instead of using the matching units they always are designed with.
@1crazynordlander
@1crazynordlander 7 ай бұрын
Nice find! Our closest 6 meter repeater is 206.1 miles away. I played with 6 meter repeaters when I was in Denver visiting my daughter and family. I was able to get a response from the repeater but nobody answered.
@SevenFortyOne
@SevenFortyOne 7 ай бұрын
I know the horizontal polarization is not ideal in this video. This was just a quick test I did Thanksgiving morning and didn't think to change it while recording these clips as I was going back and forth between the backyard and the kitchen helping my wife cook. I'll give it a try with vertical polarization in the future and see what happens.
@joshmyer9
@joshmyer9 7 ай бұрын
One other idea for a follow up test: turn the antenna 90° off of repeaters that you successfully open, then 180° for the ones that open. It's always fun to demonstrate that the theory actually works for newer folks, and also show that maybe they don't need a directional antenna. (I'm guessing that everything you could open in this video will open in the deepest null of a 3-el yagi, once the polarization is matching 😅. If it's any consolation, I didn't even think about it, as 6m is a band I never use.)
@acestudioscouk-Ace-G0ACE
@acestudioscouk-Ace-G0ACE 7 ай бұрын
A $5 antenna that works and 2 Collies, you are a lucky man! I used to train Collies to work sheep and we did dog agility for fun. Your guys would love dog agility! Thanks for taking the time to make your videos, I always enjoy them.
@SevenFortyOne
@SevenFortyOne 7 ай бұрын
We are very fortunate....thanks for your support!
@Patriot-bn9om
@Patriot-bn9om 7 ай бұрын
I purchased a used Cushcraft Ringo 6m vertical around 30 years ago. It might have already been 20 years olds at the time. I'm still using it today, maybe 50 years since it was made. The materials, connectors, and clamps on the Ringo all look identical to the 3-el beam in the video. I believe it's a earlier version of the Cushcraft A503S beam maybe 30 or 40 years old. Those are about $250 new today. For repeater use, the beam could be up to 30db better mounted in vertical polarization.
@SevenFortyOne
@SevenFortyOne 7 ай бұрын
Thanks for the info!
@Wa3ypx
@Wa3ypx 7 ай бұрын
In my area of the country, the local gas company used vertical polarized yagis that seemed to be cut for maybe 40 mhz. at their compressor stations. Ive noticed over the past few years those have been replaced something looking like an antenna for EME use!
@davidsradioroom9678
@davidsradioroom9678 7 ай бұрын
For $5, you got a real bargain. Congratulations!
@MowerJunkie
@MowerJunkie 7 ай бұрын
Wow! that's a great deal you got on that antenna.
@AlexanderGrotewohl
@AlexanderGrotewohl 7 ай бұрын
that's a cool find! gotta find a couple neighbors that wanna chat when the bands aren't open (and obviously you'll be busy now when they are :D )
@JxH
@JxH 7 ай бұрын
For wire dipoles that I've cut a bit too short, I have added a little 'flag' made with square inch or two of folded-over *aluminum* (metal) duct tape as a sort of capacitor hat. It works to lower the resonant frequency, and is a surprisingly powerful effect (since it's at a voltage peak at the end of the element). Multi-elements would be a bit of a chore, but maybe just copy the driven element solution to the other elements.
@nimroddiaries_
@nimroddiaries_ 7 ай бұрын
Nice one Rob.
@W5IPAJASON
@W5IPAJASON 7 ай бұрын
⁠​​⁠Great find! I also noticed your license plate solution
@SevenFortyOne
@SevenFortyOne 7 ай бұрын
Bonus points for the license plate observation!
@jamesholbrook3648
@jamesholbrook3648 7 ай бұрын
Try to find some aluminum tubing with an ID to match the OD of the element tips. Cut just a small collar to push over each element tip. OR small aluminum angle and clamp little extensions to each element tip. Great find for $5, always enjoy your content 73
@Radiowild
@Radiowild 7 ай бұрын
Interesting antenna. I think you got a terrific deal on it! Probably would be better like your setup on the house, using a rotor. Gotta find a 40 foot fold up to put that on!
@Ron_KR2D
@Ron_KR2D 7 ай бұрын
That looks like a Hi-Par Hilltopper. I have one, purchased at a hamfest last year for $40 - you got a fantastic deal on that one. Not much info about them on the web. There was also a 2m version but I've never seen one. Some of the old timers in my club are familiar with them and one guy has 2 of them. Apparently they were made in the 1960s or 1970s. They were intended for portable operations - field day, VHF contesting on hilltops, etc. Would be awesome for SOTA and POTA.
@SevenFortyOne
@SevenFortyOne 7 ай бұрын
Thanks for the info! I was thinking my antenna seemed like it was meant for portable use since it has those collapsible elements and wingnuts everywhere. I may give it a try on a nearby POTA park that is up on a hill at some point.
@joelaut12
@joelaut12 7 ай бұрын
Add some coils to the driven element might bring it down
@phatforrest
@phatforrest 7 ай бұрын
Doing pretty good with a horizontal antenna. Many of those repeaters have fantastic range, as you know.
@n1kkri
@n1kkri 7 ай бұрын
Just think how well it would have worked with the correct poliarity
@garyclark4930
@garyclark4930 7 ай бұрын
If you were to reorient your antenna to vertical polarization , might get into to some of the repeaters you didn't bring up due to cross polarization. Great deal either way.
@temporarilyoffline
@temporarilyoffline 7 ай бұрын
If it were me, id use so hardware store clamps and dangle a few inches of wire off the ends to bring it down the band, you'd need 9 of them... Id do some research first on how that tuning stub works because I dont get it. Overall, great find and great vid!
@n0vty873
@n0vty873 7 ай бұрын
put it vertical for the repeaters. Also change the tuning capacitor to a longer and smaller tube along with the shorting bracket (make one) use vinyl tube as an insulator, to give you more tuning range. Or just live with it for $5 what the heck. It looks as if it was built for portable use, easy up and down.
@tommiehinman1349
@tommiehinman1349 7 ай бұрын
Just find tubing the same as the Gama match connection and use the new aluminum brasing rods that claim to weld any metal together and braze it together. Then sand/grind the weld down so the clamp slides over the weld
@SevenFortyOne
@SevenFortyOne 7 ай бұрын
Good tip!
@iowahank1
@iowahank1 7 ай бұрын
Anytime you can get that much aluminum for $5 that's a great deal. Even if you can't figure it out you can use it for something else.
@Oldcomputer
@Oldcomputer 7 ай бұрын
Wow good find for 5bux. With the wing nuts and the way it folds up nicely Ill bet it was meant for portable/temp use. Like for field day or camping. I have a more modern Dimand 2m antenna that i like that. Also all the repeaters are going to be V polarization. I think thats why you had better luck with the ones far out compared to the local ones. Any luck on the 6m FM calling freq 52.525?
@SevenFortyOne
@SevenFortyOne 7 ай бұрын
I didn't think to try the calling frequency. There is usually activity on the repeaters but I recorded this on Thanksgiving so things were quiet
@Palosrob
@Palosrob 7 ай бұрын
Border collies! My sister had a border collie and she was my dog niece. The most incredible dog I ever knew. It takes a lot to understand them but I took the time to understand what border Collies are all about and we were very close. She died at 12 1/2 years in July of 2022 because she came in contact with a raccoon virus that eventually shut down her kidneys. I will remember her for the rest of my life. Mollie the Border Collie
@SevenFortyOne
@SevenFortyOne 7 ай бұрын
My dogs aren't pure border Collie...they were rescues so we aren't positive but I think they are mixed with regular Collie. They have all of the energy of a border Collie but not the intelligence. They are good pups though...very loyal and great with our family
@2metercrew389
@2metercrew389 7 ай бұрын
I wish I had that many 6 meter repeaters 👍🏽👍🏽👍🏽👍🏽
@johnwest7993
@johnwest7993 7 ай бұрын
Your antenna is horizontally polarized, but I know of no repeaters that aren't vertically polarized. The loss from a horizontally polarized Yagi-Yuda attempting to hit a vertical is atrocious, as much as 30 dB, the difference between 1W and 1000W. You could easily hit with full quieting and a quarter-wave vertical any repeater you managed to key at all with the horizontal beam. I'm actually surprised you managed to key any of them. In any near-LOS communication, correct antenna polarization isn't just important, it's essential. I learned this when I was on a mountaintop Field Day site feeding a 9-element 2-meter beam with 160W. The beam was atop a 25 foot mast and was pointing directly at our club repeater 35 miles away out on the Colorado plains. With binoculars I could literally see the water tower our repeater antenna was mounted on, but I couldn't key the repeater. Meanwhile, other hams were wandering around our Field-Day site with their HT's working the repeater no problem. That's the difference polarization makes.
@SevenFortyOne
@SevenFortyOne 7 ай бұрын
Thanks, I know about the the effect of polarization. This was just a quick little test I did Thanksgiving morning to see if the antenna worked and I think we saw that it does. I'll try it again vertically polarized when I have a chance and see what happens.
@26TM034
@26TM034 7 ай бұрын
try 6 inches of wire coat hanger lol added to the driven as a test with jubilee clips... test with VnA.. simple cheap test..
@n4leqonthego852
@n4leqonthego852 7 ай бұрын
Great video, maybe you could add length to the antenna by adding solid copper wire to the end of the elements.
@SevenFortyOne
@SevenFortyOne 7 ай бұрын
I thought about that but am not sure how to make it hold up in the weather
@n4leqonthego852
@n4leqonthego852 7 ай бұрын
If you use a heavy enough gauge wire (12-14awg) solid wire and just use a ring connector and tap a screw through the aluminum tube it should stay pretty much straight , just an idea. short of adding more aluminum tube that is about the least expansive way to accomplish it, you don't want a $5 antenna to turn into a $30 project :)
@Locksnut
@Locksnut 7 ай бұрын
It probably would work, but I don't think mixing copper with aluminum, especially for outside use, would be prudent.
@SevenFortyOne
@SevenFortyOne 7 ай бұрын
Good point...I actually have some heavy gauge aluminum wire I can use
@capndavey1
@capndavey1 7 ай бұрын
I bought a 7 element 220 beam for 10 dollars and a 17 element 900 for 15
@davidvincent1093
@davidvincent1093 7 ай бұрын
Instead of clamps get some really good shrink wrap ... not the crap from Harbor Freight... cut a piece so that it is about 3 inches longer than the center of the slider splice. I/A cut a 6 inch piece and slide it down to 3 inches on either side and then shrink it. I personally prefer to do it this way because it will limit and reduce the liquid between the 2 elements and you having to run up there every year to clean out the oxidation. Good luck and have fun wit your $5 toy as far as I am concerned you can never go worn with a YAGI and a compass to point it with
@SevenFortyOne
@SevenFortyOne 7 ай бұрын
good tip!
@davidvincent1093
@davidvincent1093 7 ай бұрын
I have done it for more years than I can think of and never had a problem MQ4MRI
@franciscolopez3229
@franciscolopez3229 7 ай бұрын
May I ask, that dips that you saw on the nano vna, is that really normal sir, and why do you think that is? I'm new to ham and been experimenting in homebrewing a yagi for 2 meters and upon testing it via an analyzer, I'll get a 1.2 swr from 144 to 145 then goes 1.5 on 146 then dips to 1.2 again at 147. Am I doing something wrong. I'd appreciate it much for some advice. Thank you sir.
@SevenFortyOne
@SevenFortyOne 7 ай бұрын
I'm not an antenna expert but I think the dips might be something to do with the matching network you are using. My other Yagi, a 5 element with a hairpin match only has one SWR dip.
@franciscolopez3229
@franciscolopez3229 7 ай бұрын
@@SevenFortyOne Oh, alright sir. I am using a Gamma Match sir. I'll do more research and I thank you sir. All the best....73.
@XPFTP
@XPFTP 7 ай бұрын
cut the tips off. stuff some copper tubing or rod of some sorts in the ends. shouldnt need to much .. maybe what 3 to 6 inchs .. no idea tho ..
@dave10524
@dave10524 7 ай бұрын
Are not most repeaters vertically polarized ??? you were horizontal, correct polarization would really help
@SevenFortyOne
@SevenFortyOne 7 ай бұрын
It's ok, it was just a quick test to see if the antenna would work at all.
@turkeyslayer63
@turkeyslayer63 7 ай бұрын
You would get much better results if you changed to a vertical polarization.
@SevenFortyOne
@SevenFortyOne 7 ай бұрын
Thanks, I know about the the effect of polarization. This was just a quick little test I did Thanksgiving morning to see if the antenna worked and I think we saw that it does. I'll try it again vertically polarized when I have a chance and see what happens.
@foxman362
@foxman362 7 ай бұрын
would this antenna work on 11meters and 10 meters.
@SevenFortyOne
@SevenFortyOne 7 ай бұрын
probably not
@jwnagy
@jwnagy Ай бұрын
I have one of these...6 meters
@SevenFortyOne
@SevenFortyOne Ай бұрын
Cool!
@jwnagy
@jwnagy Ай бұрын
@@SevenFortyOne you can expect about 5 db gain forward...works well. 73 Jeff W3AAB
@foxman362
@foxman362 7 ай бұрын
don't throw away do a giveaway so your channel grows.
@SevenFortyOne
@SevenFortyOne 7 ай бұрын
Giveaways are governed by complicated laws related to lotteries and raffles here in CT that I don't want to get involved with.
@scott762mm
@scott762mm 7 ай бұрын
It as $5.00 homie! We spend are money on dumber shit then that!