Simultaneous Transmission Tests, Comparison, and Review of the Chameleon Antenna Tactical Delta Loop
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- เผยแพร่เมื่อ 9 ก.ย. 2024
- GOUND MOUNTED or MAST MOUNTED configuration; the data tells the story. Let's put Chameleon's Tactical Delta Loop through its paces in this demonstration and review.
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Fantastic analysis! Elevating a CHA TDL in an urban environment is a MUST due to buildings proximity. But the TDL does DX and NVIS simultaneous on 40M, 60M and 80M! It's also directional. So depending of the orientation - you'll get some gain!
Everyone who brags about the TDL gets it almost right; its actually better than they say!
really enjoy these videos and the understandable way you break down these concepts! thank you
Thanks. Appreciate the feedback.
I love this series. I can’t wait to get the other components to turn my MPAS 2.0 into the Tactical Delta on the mast.
Thanks for the feedback; I too am enjoying playing with all the Chameleon gear.
Pretty much in agreement with what I have found over the years with DLs. 30 to 10 meter performance at modest height (I never had any DL over 30 feet max) was great, and always better than a dipole mounted in the same space. The low bands do show the TDL limitations, 80m in particular, with a good antenna you can expect the band noise to be S9, let alone the signals on there. Your video shows signals way under what I would expect on 80m. We sometimes dont appreciated how strong signals are on the low bands, you know when you have a good antenna when you HAVE to switch in some attenuation! But even a compromise antenna is better than no antenna so the TDL giving something your typical tuner can work with is good.
73s de G0AFV
Thanks for viewing and sharing your experience with the rest of us.
hi there, i run a chm tdl for pota (ground), the only thing i can say is money well spent ,some contacts to Europa on ssb 57 both ways , now i guess i need a mast 😀😀😀 73 from Canada
Glad to hear confirmation of my findings; everyone seems to love the TDL.
Love the Excel analytics!
A skillset I learned in my profession over the last 30 years. Glad to finally put it to some worthwhile use in my hobby!
I did this same thing 3 weeks ago with a 20 foot mast during the 11 May 24 weekend of the aurora and G5 storm. I feel the 20 foot mast on my truck saved the activation. I made alot of components to adapt a broken Spiderbeam Pole and a brand X hitch mount and some printed pole clamps. Imminently cheaper than the hitch and metal pole that Chameleon sells. I've been working on that project for a least the past 6 weeks.
I enjoy your experiments Philip; keep it up!
I have both the MPAS 2.0 and TDL and both work very well but I am particularly impressed by the TDL even during poor band conditions. Thanks for the video comparison.
Thanks for the feedback...so far its unanimous. Those that use it state it is an excellent antenna.
Great video! I use the TDL for portable setup all the time and have great results. 73
Agreed. I've been pretty impressed with it. If I wasn't in an HOA I'd have it up a lot more!
Nice video, Bob. Look at L.E. Cebik’s paper on loops. His models demonstrate the effect of height above ground on how loops like this change the take-off angle and other factors. You’d enjoy reading it…
Thanks @Frank_K4FMH for that input; I'll definitely be checking that out.
Pivot tables and relational databases are the coup de gras for data analysis! You objectively show what we subjectively knew from operating. Thanks!
Its great when the data confirms reality! And then when it doesn't time to rethink things.
Great work sir!
Thanks, I enjoyed performing the tests and studying the results.
nice reports -- Always good to see the FACTS on paper.....love my TDL...
Everyone who owns the TDL says the same thing about it. Nice to have the data confirm what we all felt to be true.
Great video Bob. The bands have been pretty bad up here in TN for the last few weeks. I'm hoping things will be different with the CHA TDL.
Thank you for another video!! Enjoy this heat!!
Glad to share it with you, and glad to have you come by for a look.
Bob, one of your best analytical videos. I'm pretty much sold on Chameleon antennas. My QTH is very noisy and I need a quiet antenna. It's my understanding that Delta Loops are inherently quiet. Have you found that to be true.?
Because of being in the HOA, I've been careful about using the Delta Loop as it draws attention. The few times I have used it, I was blown away by the low noise floor.
My next POTA activation is definitely going to be with a TDL.
Pivot tables are your friend, especially if your job is statistics or statistic related. In a past life... Nice way to compare antennas. 73
Thanks. Once I saw the data table, my brain immediately went to Excel...couldn't help myself.
One really interesting metric you might be able to pull is what the average difference in recieved SNR is for stations that appear in both datasets.
in sql I think that would be something like this: (with made up column names)
WITH (
SELECT
mast.rx_station,
AVG(gnd.snr) AS gnd_snr,
AVG(mast.snr) AS mast_snr
FROM gnd_dataset AS gnd INNER JOIN mast_dataset AS mast AN gnd.rx_station = mast.rx_station
GROUPBY mast.rx_station
) AS snr
SELECT AVG(mast_snr - gnd_snr) FROM snr;
I was wondering what I could do with SNR for comparison; thanks for the suggestion.
new ham question-sorry:-) when you say they reported hearing you- was this the result of an auto signaling msg you sent out or were you going back and forth with them?
Nice video! I was really hoping that 6m would make an appearance, even if just for the SWR graphs. It’s funny how Chameleon markets this as 6-80m, but all of the data I’ve seen so far is just 10-80m.
I’m hoping for some 6m openings / sporadic E during Field Day, with the intent of using the TDL if so.
My WSPR transmitter doesn't go down to 6, so it didn't cross my mind to check the SWR...now I'm wishing I would have for you.
Nice
Thank you for your videos! You encouraged me to invest in the 25 foot porta mast for my new QTH. I would also love to see a deeper dive into your Excel analysis! I have a quick question, I have not got my Porta mast up and running yet, but plan to use my chameleon hybrid micro to start. I am seriously considering the tactical Delta loop also. I primarily operate on 40 and I'm wondering in your opinion which will perform better? I typically operate between 9 PM and midnight, phone/voice 100 W. At my old QTH I had a cobra full size mounted 40 feet up in trees and could make contacts pretty much anywhere in the Continental United States. My new QT has zero options for getting a dipole up off the ground. Wondering what my experience might be like and if I'll have been too spoiled with my performance in the past.
I used a 73' wire with my CHA Hybrid Mini for a few years; worked incredibly well -- I often worked 40 meters.
My limited experience with the TDL so far, I would say I prefer it even to my 73' wire. HOWEVER.... The TDL isn't intended for parament set up. On top of the Porta Mast, well, the TDL does even better than on the ground.
So, if you're looking for minimal set up, a 73' or longer wire will get it done. Right now because of space constraints I'm using 30'...just doesn't get it done of 40 and down.
Bob, Fantastic Video!. I have the delta loop and a 12 foot mast that will work. It would be cool if you could offer the same data for the elevated 2.0 or MPAS Lite. You would need the "Stinger Kit". From what I have found online such an antenna elevated can create a 3-5 db gain depending on band. If this holds true that would pay almost all of the convenance tax putting a real dent in the I only run resonant nay sayers. I already have a stinger kit but have almost come to the conclusion I am more of an antenna parts collector than a user. 73
Thanks for the view and comment; you've given me a couple of ideas I'll have to give a try.
I have the MPAS 2.0 and am thinking about adding a delta loop. I love the look of it. I wonder if there any advantages to using the longer 2.0 antenna in a loop config since I already have one green whip.
The SS17 is longer than the Mil Whip, making your TDL larger overall.
Great video and analysis. What height was the portamast for the testing with HOA, was it the full 20ft or lower to the ground? Thank you and 73s, Ben K
Full 20' on the Porta Mast. Thanks for the feedback.
Make a good excel video for this. I am an exec, I often over simply analytics in excel vs our deep-dive data analytics front end. I can probably replicate this based on your walk-through. But I am not interested in building another wheel😂 .
Sounds good. It just a some data naming, Pivot Table, and a chart or two.
@@HOAHamRadio Usually by adding additional fields into data sets and various tables, then mapping using filters or other formulas - basic aggregation techniques. I always have tabs for deep dives should one of our more senior leaders want to dig in a bit, but most of my c-suite presos generally are single session, 15-25 minutes, and if they want to deep dive usually a follow on. Most of my follow-one are with peers as they are at a level with me where we need to do both deep dives and manage south and north. So ya, i love to nerd out on data and data points - the firms and organizations I have been in over the past 10-11 years are very data driven, but sometimes you need to dumb it down just a bit (no disrespect) to take deep technical efforts, mostly data center engineering, and put it into more simplified and aggregated visuals. I eases the burden on explaining what the data points are. . Lipstick on a pig as i have been saying now for about 35 years..lol
@@WayneDowning3382 I'm with you; I do exec summaries all the time. You are right, keep it simple, have the backup....
One thing to keep in mind ...as we all know, the Chameleon MPAS and other components are well-designed and modular. The broadbanded 5:1 Hybrid Mini or MIcro unun is the heart of the system. What do you get....lower SWR across the HF spectrum as well as ease and quickness of setup. What are the drawbacks? Loss and expense. Some have calculated at least -1.5 dB thru the Chameleon ununs. So, for about 100 watts input, you only get out about 71 watts into the antenna the other side of the transformer; assuming the testing regimes were accurate. TANSSTAAFL....there ain't no such thing as a free lunch (Robert Heinlein - "The Moon is a Harsh Mistress)...this is not magic. I like the Chameleon MPAS system, but it has its place. If you have the time or inclination to erect a full sized and resonant antenna, then do so. I like Delta loops and am currently exploring options for improving the base Chameleon system without the lossy transformer. The other thing to keep in mind is that the whips and connecting wire are self-resonant around 17 MHz. Performance drops off significantly below that frequency, as we are aware. Chameleon is going to issue longer components of the CHA-TDL system soon to get the resonance down to around 11.5 MHz, two (2) - 25 foot whips and a 35 foot connecting wire IIRC from the company's posts on FB. Finally, this antenna is just one option in your communications toolbox....its not the be all and end all.
What configuration do you use for you WSPR set up? I was looking at an appliance based solution (ZachTek WSPR desktop transmitter). Which is helpful for me since I only have the one radio. For me it’s about comparing what is my reference antenna vs, my own builds.
Ding ding ding...ZachTech WSPR Desktop is exactly what I am using. New addition to the tool kit, and I am thrilled with it.
Hi Bob, I'm not sure if you covered this in another video and I missed it but I had a question on my Chameleon TDL. Can I run just the Mini Base with one17' whip mounted on a tripod and be able to run 40 meters? If yes, would I need a tuner? Thanks, Jim
That would make it a MPAS Lite...not affective on 40. You could give it a try, and you will need the tuner, but I would not expect it to work well. Doesn't mean you would not make any contacts...you've seen me make contacts with some compromised antennas; it just won't work well.
@@HOAHamRadio Thanks for the reply Bob.
2 questions can I leave the T. D. L. up permanently and is it possible to mount this antenna midway up the same mast that my VHF/UHF antenna on and if that is possible is there a commercially made standoff of about a foot in length or will I have to make my own thanks and 73 for now from Ed W9JE
Don't have any recommendations on a standoff. I am not certain, but I do not believe Chameleon Antenna recommends the TDL for permanent set up.
@@HOAHamRadio that totally sucks I live in a space restricted area and the T. D. L. would fit the spot perfectly and I could use ham sticks but it gets sold up here in Wisconsin in the winter so I don't like going outside each time I want to change bands plus I can't run anything that requires radials since I'm on the upper level
@@N9IBZED You may want to check directly with Chameleon.... While I know a lot, I do not know everything.
Ground loss is a big factor.
I've been contemplating finally getting a mast, in general, to get stuff higher up; and I already love my TDL; so I really appreciate this examination of what happens when you get the TDL up high! Other than the PortaMast (which feels a bit more bulky than I want to deal with), do you have a recommendation for a mast for the field?
As far as a robust mast, I only have Chameleon; Porta Mast and their FG Mast. I'm sure there are others out there. The opening shot in the video is on the fiber glass mast; I think collapsed its about 3 1/2 feet...its a chunky boy, and STRONG.
ok i get it- the wspr system does this
Yes, the equipment is doing the communicating...i.e., someone else's WSPR device "hears" me....
@@HOAHamRadio TY 73
I have the MPAS lite and then I ordered extra parts for the TDL. I want to mount it to my 25' mast from DX Engineering. I just need the adapter.
We're manufacturing 200 units of those adapters! They should be ready in about 2 weeks or so!
Hold on - we found about half a dozen at the HQ. I'll post here when ready to purchase today!
@@Chameleon_Antenna Thank you. I am going to have the TDL for Field Day. KI5UTS
Ok - we've 4 units available now! Search for: CHA UNIVERSAL TOP ADAPTOR
You're gonna love that adapter with your FG mast.
I've been considering co-phased TDLs. Hmmmmm......
Hmmmmmmmmmmmm indeed!
What hitch mount are you using?
Chameleon Antenna; one of the Porta Mast mount options. With an extra insert, I'm able to get it to work with my fiberglass mast as well.