Yes, works well. Great swr (less than 1.2 to 1) with 3-17' and 3-33' radials , WRC 213" whip, and 50' rg8x , but your mileage may vary. Made a bypass wire with 3/8 ring terminals, and in the middle an Anderson Power Pole to either add or bypass the coil without unscrewing. Another great video, Thanks and 73!! Mike~NG9B
@briantrask8173
Жыл бұрын
I was thinking about trying it with 3 or 4 33" radials. I think you are confirming my thought on that.
@dwightkellams6065
2 ай бұрын
Per the owner at Hamvention 2024, the coil is now designed for the Chameleon 17' and no longer requires the wire extension. WRC 213" will now have to shorten their antenna 9". I am not certain when the change in design occurred. occurred.
@KB9VBRAntennas
2 ай бұрын
Yes. This video was released in November 2022, shortly after the Sporty Forty coil was introduced. The owners of Wolf River made the design change in May of 2023, and announced it at Hamvention that year. If you watch my videos since that point, you'll see I'm using the improved coil and no whip extensions.
@dwightkellams6065
2 ай бұрын
@KB9VBRAntennas Any way that you can update this video? If I had not asked the question I would still be operating under erroneous information.
@KB9VBRAntennas
2 ай бұрын
I can't physically change or alter the video once it's published. I'd have to remove it and produce a new one. That probably won't happen as I've made subsequent videos that referenced the upgraded coil, like this one: kzitem.info/news/bejne/lKuZma2gnGp0eYo. I can add something to the video description or pin a comment. There are comment replies that talk about the updated coil, though. So I don't know how many people would see it.
@tonyd6884
Жыл бұрын
Thanks for the review. The guys are WRC are great people.
@davewhite7679
Жыл бұрын
Another turn on that WRC coil sure would have made more of the popular telescopic whips viable options. 🤔 Yes, the VSWR on 40 meters with coax feedlines less than 1/4 wave long often seem problematic. I see similar issues not only with the WRC but also with my mobil Shark stick. With an unbalanced 1/4 wave antenna, the coax shield is essentially becoming another radial potentially impacting the measured impedence. A carefully positioned RF choke on the coax or extending the coax length by 10 or 15 ft. might make a big difference in the measured impedence. It won't make the antenna any more efficient, but it will make your transceiver a lot happier. 🙂 KZ9V
@davidsradioroom9678
Жыл бұрын
It's a nice coil. Your review was fair and honest. However, I think I with my TIA-1000. 80 Meters is a must for me. This might be a good value for others, though.
@georgeosier5459
Жыл бұрын
a followup to a previous comment .... I have the Chameleon SS 17 and just got my Sporty Forty yesterday (8/30/2023) ... set it up quickly with one 16 ft radial and 25 ft of coax on a ground mount ... using a LDG AT- 100 PRO II tuner ..... got a very fast tune and 1 to 1 from 7025 to 7120 .... with a better radial system possibly better ..... thanks for the videos turning on to this !!!!! ... de N2JNZ
@haroldskinner1783
Жыл бұрын
Love Wolf River Coil products, add this as soon as I soon as I seen it available, already scheming about adding a jumper or switch to go between 20 & 40 more easily. Thanks for sharing. When sitting up use a NanoVa to do my checking and tweaking with. The whole operation of deploying and checking is 15 min or less.
@briansalsbery9968
Жыл бұрын
Great video. It was especially valuable that you showed that radials and coax shield affect impedance. Nowadays, I am always adjusting how much I coil the tips of my radials with each band change while operating portable.
@RandomWire107
Жыл бұрын
They need to make one for a 102” or folding military whip.
@wildbill1
10 ай бұрын
just ordered the sporty 40 hopefully do a POTA soon. My plan is to center load it it. ill let you know how it works.
@brandonzawaski
10 ай бұрын
I was surprised I could get 80 on the TIAG.
@pasjeihobby
Жыл бұрын
I'm efhw guy but slowly I can feel temptation for verticals. 73
@darylcheshire1618
2 ай бұрын
I just ordered the 213” and the Silver Bullet and the tripod mount, unfortunately the Sporty Forty is out of stock, try again in a few days.
@KB9VBRAntennas
2 ай бұрын
It's worth the wait. Be sure to check out my other videos on using the the Wolf River Coil with a ground screen or Faraday cloth.
@martouf2218
Жыл бұрын
two more variables affecting feedpoint impedance: height of feedpoint above earth, and angle between vertical element and radial elements
@andyw3720
Жыл бұрын
Great video. You’ve inspired me to try my MP-1 Super Antenna coil(s) with my 17ft MFJ antenna for those lower bands.
@n0vty873
Жыл бұрын
Thanks for the review.
@larrybiederman8093
11 ай бұрын
Seems the sporty40 with Chameleon s77 and the extension piece is a good option, since it is more sturdy and allows lenthening without the wire clip
@mattb7406
Жыл бұрын
Is it a problem using a vertical to communicate with others having horizontal antennas? Great VID!
@StevenHailstone
Жыл бұрын
Happy Thanksgiving, Mike! Using the Sporty Forty, can you tune for 30m, or is that band out for this setup?
@gatheringwatersradiomeritb3182
Жыл бұрын
Very easy to get to 30m. I reduced the WRC coil 3 lengths at bottom and another 4.5", if I recall correctly. You can figure out with your antenna analyzer. Then I make a small notch at that point with a file, and I can get back to 30m very quickly without the antenna analyzer.
@KB9VBRAntennas
Жыл бұрын
You should be able to shorten the whip until it tunes to the 30m band. I haven't tried that, but there is no reason why it won't work.
@DonDegidio
Жыл бұрын
Hi Michael, Nice review and also for how the coax length and radials varies the SWR. Have you tried it in a center loaded configuration? Happy Thanksgiving to you and Christine and you both stay safe. 73 WJ3U
@KB9VBRAntennas
Жыл бұрын
I haven't tried center loading yet. I do have a couple of rods to raise the coil, so it is on my list of things to check.
@Frisky0563
Жыл бұрын
Mike hi Happy Thanksgiving! I love that coil will order one for sure. What tripod are you using? 73s ❤
@K3JRZOnTheAir
Жыл бұрын
Definitely a nice little antenna system. 73!
@martinhuyett7502
Жыл бұрын
My limited experience with the sporty 40 is similar. I like the versatility of the mini coil so likely will stick with it
@KB9VBRAntennas
Жыл бұрын
It took a little bit of playing around to figure it out. But once you understand it, setup is super fast.
@tomking8597
Жыл бұрын
Can you measure the inductance of the sporty forty?
@322doug
Жыл бұрын
Thanks
@anonymous_friend
9 ай бұрын
Do you use a current choke at the radio or at the antenna feedpoint with verticals like this? Also curious if I go with the shorter Chameleon 17' whip and the silver bullet 1000, will I have trouble tuning into the upper and lower portions of 80m? Thanks!
@smfritch
Жыл бұрын
Do you have a chart to adjust the whip part of the antenna for different vans other than 20 and 40? That would be extremely helpful and save hours of time. I realize they were going to be slightly different in every application, but getting the general links would be wonderful.
@larrybiederman8093
11 ай бұрын
Thanks!
@KB9VBRAntennas
11 ай бұрын
Thank you for your support, I really appreciate it.
@dougdaniels
Жыл бұрын
Nice comprehensive review. Any experience on a vehicle with a magmount?
@gregorykenley5997
Жыл бұрын
Michael - what application are you using on your laptop as you on the air doing your POTA activation? Also - what battery are you using? I have recently returned to using the WRC after converting to the Battery Clip Radials (thanks) and I also use the Yaesu FT-891. Follow your channel regularly - lots of very practical day to day tips. AC1NY
@kuhumbuwa
9 ай бұрын
Antenas official ®
@hp7093
Жыл бұрын
I was going to get a few of these coils. Ham soda a ham stick comparison and there was no performance difference
@BurtonChristmasLites
Жыл бұрын
Mike I have several of the MFJ hamsticks. While I know the power handling may be less, how do you think this might compare in the same setup? (Instead of using the Sporty Forty) I know that is a open ended question of sorts, but not really interested in buying if I can achieve the same type of results with the hamstick. Esp. on a tight budget. Have not tried it yet but think I will do the same type of experimentation you did. Ideas? 73, Robert Burton KD4YDC
@billjobes1851
Жыл бұрын
Michael, since SWR isn't the only measure of a successful Sporty Forty install, and Reactance can really help tell the story, what are the Reactance ranges you consider to be acceptable, even when the SWR is less than ideal? Thank you.
@KB9VBRAntennas
Жыл бұрын
That's a great question. I think the answer is to look at your feedpoint impedance. if the impedance is 50 Ohms, then your SWR will be very low, but the reactance could vary (for example, a dipole has a natural impedance of 70 Ohms and a 1/4 wave vertical can be as low as 25 Ohms). Which means if you tune for those resonant impedances, your SWR will increase to 1.5:1 or so but the reactance will be near 0. If you tune for 1:1 SWR, the reactant impedance will be the difference between the resonant point and the 1:1 SWR point, which would be about 25 ohms or so. The debate, of course, which is more efficient- 1:1 SWR or 0 reactance. I think the answer lies in the middle and this exercise is a great example of why you shouldn't sweat it if you can't get perfect SWR out of your antenna system.
@billjobes1851
Жыл бұрын
@@KB9VBRAntennas Thanks, Michael for lifting the veil on what to me has been a mysterious topic ! When you mentioned the reactance factor in the video, you opened my eyes to a topic I managed to skirt over some decades of intense focus on SWR alone. The clarity of your explanation powers me forward with newfound curiosity as I fiddle with wires.
@forgetyourlife
Жыл бұрын
Crazy 80 please. :)
@KB9VBRAntennas
Жыл бұрын
That would be cool
@garytedlock7533
11 ай бұрын
Michael ,what kind of clip did you use?
@KB9VBRAntennas
11 ай бұрын
It was a small alligator clip
@garytedlock7533
11 ай бұрын
Micheal, thanks ,that's what I thought you used , I had a piece of 10ga. I used and I thought it was going to be to heavy for the small Alligator clip to hold it' I'll just make another with 12ga.
@donaldsmith3048
Жыл бұрын
With the coax length, can a clip on choke be moved along the coax to adjust?
@davewhite7679
Жыл бұрын
Yes, I've had some success doing that. It can be a little tedious finding the best spot, but if you always use the same cable, just leave the choke in place for next time. KZ9V
@ScottWalton
Жыл бұрын
Hi Michael, I just got a brand new Sporty Forty. After watching this video, I expected to need the lengthening trick, since I also have the Chameleon 17’ whip, and made your alligator clip extension in preparation for testing. My experience however, is quite different. In two separate tests, I’ve found the best SWR results from shortening the whip by about a half section, rather than needing the extension. I’m wondering if it’s possible that WRC has listened to the comments and added a bit more wire to the newest models so the 17’ whips don’t need an extension? I tried this mounted on a stake in the ground and also when mounted to a car based hood mount. Same results in both situations. Thanks for any thoughts!
@KB9VBRAntennas
Жыл бұрын
That's a good question, and I don't know the answer. If I see the WRC guys at Hamvention, I'll ask if they made a change to the coil. Otherwise the only other possibility I can think of is maybe your ground conductivity is different. Here in Wisconsin, where both WRC and I live, we suffer from poor conductivity due to the high degree of granite bedrocks. If you have better conductivity, that may affect your resonant frequency.
@ScottWalton
Жыл бұрын
@@KB9VBRAntennas Thank you. I am in Northwest Florida with lots of sandy soil everywhere. Not sure how that impacts conductivity.
@AllanBProductions
Жыл бұрын
What is reactance?
@markusberg2770
Жыл бұрын
Reactance (X) - Opposition to alternating current by storage in an electrical field (by capacitor) or in a magnetic field (by inductor), measured in ohms. See a Smith Chart for greater understanding of optimum antenna configurations, and how reactance is significantly involved in the outcome. 73
@truckinguy92
Жыл бұрын
Don’t radios start folding power back at 2.0 SWRs and above? It’s kind of odd your SWR went down with less radials & the 25’ of coax. This really frustrates and baffles me at the same time. I’ve watched countless videos about number and length of radials. There’s so many conflicting stories and supposed facts. I was under the impression more shorter radials is better and their length doesn’t matter. Ground and elevated verticals seem like more trouble than they’re worth.
@johngriswold
Жыл бұрын
I’d like to see results with different cables. The given results don’t seem right.
@truckinguy92
Жыл бұрын
@@johngriswold Yeah I have no idea. Antenna systems are more complex than most people think. Everything affects everything. He was in a park in the 1st part of the video then at his house the 2nd part. The ground content and moisture could be totally different at both locations which can affect all kinds of readings on the SWR analyzer.
@DaDitDa
Жыл бұрын
Is the coil wire stainless steel? If so, this may explain the odd SWR behavior. Stainless steel wire has a significant resistive loss (i.e., resistive loading) at 7mHz (e.g., 1 meter of 1mm diameter SS wire yields about 14 ohms resistance -- taking into account skin-effect). Edit: Oops... that should be about 1.7 ohms based on calculators found at OwenDuffy's RF/DC resistance and skin-depth calculators website.
@av-ji9qy
Жыл бұрын
When will it be on the Webb site so we can purchase it?
@KB9VBRAntennas
Жыл бұрын
It goes in and out of stock. Watch the order page and try the link every couple of days to see if they have some in stock.
@jyunte
Жыл бұрын
I bought the Sporty 40 and 213-inch telescoping antenna at Dayton this year. I found that it is resonant at 8.2 MHz with the antenna fully extended! That's about 15:1 at 7.200 MHz! I cannot get the SWR any lower, regardless of the number or length of radials. Any suggestions? I've written to WRC twice, but they have not responded.
@KB9VBRAntennas
Жыл бұрын
That doesn't sound right. Maybe there's a short in the coil or your coax. I'd contact Wolf River Coils for assistance.
@Trent28888
Жыл бұрын
What ya need is 10 ferrite beads on ur coax or elevate ur radials but that coik is built bad
@n0vty873
Жыл бұрын
Looks like wolf river coils is caput
@KB9VBRAntennas
Жыл бұрын
Really? How so?
@n0vty873
Жыл бұрын
@@KB9VBRAntennas does not answer phone, emails, order requests. Everything is out of stock. Unless I went to the wrong wolf river coils Websight
@n3ljs399
Жыл бұрын
Cut that shrink tube off and count the wraps for us….
@KB9VBRAntennas
Жыл бұрын
In a Hamvention follow up video that I made, I talk about changes Wolf River made to their Sporty Forty to make it tune a bit better with the Chameleon 17 foot whip: kzitem.info/news/bejne/lKuZma2gnGp0eYo
@vernonbruce3722
Жыл бұрын
If it is that difficult to tune, I wouldn't use it.
@KI5OLVRADIOACTIVE
Жыл бұрын
I got mine to finally tune with my 18 inch extension and my CHA SS17 whip with 6, 11ft 6 inch radials at 1.4 - kzitem.info/news/bejne/pJWNrn1of6CfnIY
@vernonigneri51
Жыл бұрын
Love this so much!!! #1 view provider P r o m o S M!
@williampeacock9473
11 ай бұрын
So Michael the MFJ whip needs to be longer by 11 inches is that right. Thank you for the video you have made. 73 AE4OY WILLIAM PEACOCK,Sr..🦚 EM-81UF Blackshear, Ga. 😂
@KB9VBRAntennas
11 ай бұрын
No. The Chameleon 17 foot whip needs to be 11 inches longer. The MFJ-1979 whip is plenty long. But after my review, Wolf River modified their coil by adding an extra turn of wire. So now the chameleon whip works fine without an addition of wire
@alvarogaitan2529
Жыл бұрын
work well zero cero zero and 0 complains fantastic 73 from kb2uew
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