How To Tune A GMRS Antenna & SWR Basics

How do I tune my mobile GMRS antenna? What is SWR? What does SWR do? What is "good" SWR and what is a "bad" SWR? In this video I answer these questions and talk about the basics of SWR on GMRS and UHF antennas including how to tune a mobile GMRS or UHF antenna.
Link for the inexpensive SWR meter we use: amzn.to/2GSzOqH
Link to the Browning BR-450 GMRS / UHF antenna we use: amzn.to/3lp4WwL
Link for the smaller, Tram GMRS antenna: amzn.to/3naC5g8
#GMRS #SWR #MobileCommunications

[@TheNotaRubicon]

Link to the inexpensive SWR meter we use: amzn.to/2GSzOqH Link to the Browning BR-450 GMRS / UHF antenna we use: amzn.to/3lp4WwL Link for the smaller, Tram GMRS antenna: amzn.to/3naC5g8

[@nypigskin]

Quick tip. After setting the bolt cutter where you want to cut the antenna, throw a small rag over the top of the bolt cutters and antenna end so you don't shoot those little suckers all over the place. They'll drop right at your feet.

[@westondupree4012]

Just getting into gmrs and this channel is just what I needed. Great content !

[@Dallas-Rife-UDX-347-Tennessee]

It’s about time someone addresses this issue ,, thank you 👍

[@TDanNix]

It's hard for men to get over the longer is better mentality, I would have guys ask me "why are you cutting my antenna, it won't talk as far". Good job on the no bs explanation of swr and the need to tune an antenna.

[@ewicky]

LMAO "longer is better mentality". It's not about how longer your antenna is, it's about how you use it.

[@toddhoffmaster6057]

A Dremel with a cut off wheel is the easiest and cleanest way to cut the antenna down to size.

[@petek1pml746]

Great video Randy, But I missed your normal sarcasm. Best calibration video I have seen to date. Thank you for your always great information.

[@williamholiday468]

I hope you realize that, in addition to your work here being very engaging (I like watching “some people” getting their chops busted), it is truly very informative. Particularly for someone like me who up to a few months ago thought the only part of a radio you had to know about was the O-N/O-F-F switch. Thanks!

[@positivelyportugal]

Thank you for all the great videos. Takes a real man to use a cute little vice like that in front of everybody, stay strong fellow girl vice user.

[@donalddodson7365]

Great explanation. (Fun to see your early set up ... and persona.)

[@caseyl3631]

I really love the topics your covering! Great intro for 4x4 folks who are looking for more out of their comms. I'll add there are plenty of antennas out there that come pre tuned. But don't think I'm suggesting to ever do any antenna install without at least measuring SWR just as you stated. Comet 2x4 is one of my personal favorites.

[@BlindIo42]

This was a much better tutorial on tuning than I've seen in the past. Thank you.

[@KV6OTT]

What a difference a year has made! I've enjoyed your videos... Keep up the good work annoying SadHams.

[@WarpedSpeed]

I trim mine on a bench grinder. Slow and steady and mark a line where to stop.

[@MrAcuta73]

Perfect! Thanks for the link! The whole Ohm's Law Vs RF boost Vs SWR is just....confusing. But as long as I can just plug in a meter and figure the SWR, I don't care. LOL

[@explorer867]

Thank you very much for your videos dealing with GMRS radio. I will be tuning my antenna today and your video is informative. Have a great day.

[@patrickralston1246]

Amazing how better your videos were back then.

[@CliffLoehr]

Very informative! Just thinking... shouldn't you check for any bent, or coiled coax cable, and check for proper grounding BEFORE cutting your antenna?

[@txbob5978]

That's exactly what I was thinking when he talked about trouble shooting the adjustment.

[@erichenery6315]

Well done, I appreciate the humor, radio can be monolithic... you must be a teacher, if not, you should be. Thanks for the instruction.

[@weswalker1208]

When you trim it a little too far you can regain some length by putting the antenna below the set screw but not bottoming it out

[@moss-ccw7971]

Pro-tip: @ Randy Notarubicon Productions For tuning replace the Stainless Stinger (SS) with a piece of wire that is about the same diameter, & length as the SS one. Trim or lengthen the tip of the wire, until you get the best SWR, then remove it and cut the SS to match. Install the SS, and your done. I've been doing it this way for many years. It saves a lot of time and frustration of pulling the stinger in and out, especially on taller vehicles.

[@jrpefx]

Great job, a very good description of what needs to be done and how to do it .And you touched on the other stuff that might be wrong, Thank you.

[@TheDukie54]

I just wanted to thank you for all of your video's and the information you share. I have learned a lot for you. I look forward to each new video your produce. Thanks again!

[@garymcilnay2675]

I use a fine triangular file to score the antenna then use pliers to snap off the antenna at the scored mark. I have found that that works very well.

[@Doodlez4]

I found your channel a few months back and can relate to your sense of humor, but the visual of a toe nail flying into you eye... hahahaha, sorry, that's just funny

[@freeidaho-videos]

Yeah, finally watched a video of yours with no bitching. Thank you! Thumbs up!

[@TheNotaRubicon]

People that dont like the bitching are usually who I am bitching about.

[@wrem9706]

Thank you so much! I was able by following your video to get my SWR down to around 1.2!

[@pauldickinson1756]

Excellent video. I just ordered the inexpensive SWR meter you linked. Thanks! Once it arrives, obviously I'll check my SWR.

[@timsmith9169]

I lucked out , I had a pro that works for public safety doing radios . I have a Motorola cdm 1250 with a team 1480 6.5 db gain with 50' lmr400 .he got 1:1:1 match .wow does it get out too .our club has 3 large repeaters . We all check out not a these videos great tips for our new people and us ole timers as well . Great videos keep em coming .73s nysgmr

[@jal7306]

Stupid question, no doubt, but I will ask it anyhow. Let us assume that you have trimmed so that your SWR has dropped from the original 1:8 to 1:4. Now, you are about to proceed to trim again, making sure that you are taking the same size bits from the antenna as you have previously in the process. You are, of course, trying to get to as low an SWR as possible, so you continue. You test after making the last cut, and the SWR begins to proceed back up the scale. You check everything that you have mentioned regarding what could cause this problem but nothing other than the size of the antenna seems to be the problem. Consequently, you are stuck with the higher SWR now. You can't go any lower now, of course. It is at that point in the process that seems to be totally unpredictable. When do you decide that the process needs to stop? Do you settle, say, for instance, on the last measurement of 1:4 or do you take the "leap" so to speak to venture into the land of "damn, I have to buy another antenna!"

[@canyonrunner]

Been there and done that more than once. Depending on your particular antenna and its 'style' I have found that Amazon sells stainless steel rods in a 10-pack of varying lengths that have helped me to save a two-part antenna that I over trimmed. It was easy to get the hang of it when I was practicing on disposable rods. My final tune on my expensive antenna was 1.25 on Channel 15 at Low Power. Channel 1 SWR is 1.15 Good enough for me. Thanks Amazon for the 300mm x 3mm 304 Stainless Steel Solid Round Bar Lathe bar Stock- Pack of 10 for $11.00.

[@keithguiste2659]

The swr meter is out of stock at Amazon until November 24, i hope I remember to come back here and click thru your link when I get ready to buy😊

[@CWfist]

Put it in your shopping cart anyway,,, when it becomes available it will be there

[@shawnm2597]

I was wondering if you should tune using 465.1437 as your center frequency to account for the higher frequencies that the repeaters use? (low ch. 1 at 462.5625 and high of 467.7250 for highest repeater freq)? Considering the higher repeater frequencies are the frequencies that allow up to 50 watts, would it be better to make sure these have the lower swr readings? Oh, and thank you for posting this video. I know its a little bit dated, but i just discovered it and it shows how easy it is to tune your antennas.... hopefully it will encourage others to tune without being afraid of destroying their antennas. Great video.

[@mitchellconley9338]

Could you elaborate on your justification on why its not necessary to use the CB method of comparing SWR's on low and high channels? You state that because the antenna instructions give the recommended length, we can just trim the antenna till we get the lowest SWR. I don't see how that would work because we wouldn't know that it is the lowest achievable SWR until the ratio starts to go back up, but at that point the antenna is already cut too short. Is the method of checking on low and high frequencies still applicable to GMRS the same as CB? Great channel btw. You have a good attitude. Just discovered your videos and also just getting into GMRS after being on CB for a few years. 4x4 club is transition to GMRS so its time to get on the bandwagon.

[@huntinbob06]

Great video. Where did you get the white wire that connects to the GMRS?

[@williamb9060]

Great explanation on SWR.

[@phillipstracner7909]

My wife tells me i need to fix the SWR on my pecker.

[@augustusmccrae7714]

I newbie question. For the handheld GMRS radios that have removable antennas - are the antennas that are included with a Baofeng GMRS-9R (Upgrade of the UV-5R) pre-tuned out of box? And, if you buy a longer whip antenna that can screw into the radio, are they pre-tuned? In other words, is it necessary to check their SWR readings the same way you would for roof-top mag mount antenna?

[@RescueEMS]

The FCC advised me today that the fee for GMRS has NOT been reduced by Congress. They suggest waiting until the last date for renewal to see if Congress has approved the $35 fee. They suggest waiting at least 30 days from May 7.

[@DrivinwithJoe]

First let me thank you for all the information you have made available. It has helped tremendously. I am a total noob. I have 3 radios on order from (affiliate link below). And have been researching, but I can’t find much on antennas, mounts, wire, connectors ect.. Any suggestions on where to look? I’m thinking of contacting we’re I purchased my mobile unit for my truck to ask for suggestions. But I thought I’d ask you first. And maybe give you video(s) idea(s).

[@mikeanderson6219]

Do you stop once you get below 1.5:1 or keep going until you get closer to 1.1:1? How do you know when to stop cutting, or more importantly, what if you go too short looking for the best ratio?

[@Texas1FlyBoy]

Trim only a very small amount at a time, and only if moving the whip in/out of the base doesn't give you good enough results. If the SWR lowers as you move the whip farther in, but the whip bottoms out, then cut a very small amount and try again. "Rinse and repeat." If the SWR starts to go up - STOP cutting and move the whip back UP just a small amount and the SWR should go back down.

[@randolphtrager5858]

Thanks for de-mystifying the closed World of radio, and love the verbosity and de- pussification of language

[@polishpicl]

Recent facts shows a high swr DOES affect receive..I personally have shown it on a manual tuner on hf or uhf..

[@trondyne3513]

SWR problems may not be related to electrical length and instead related to other problems like bad ground plane or no ground plane... These can be harder to fix...

[@Sean-sj4hv]

So why go with the UHF antenna you have that you have to trim instead of something like a Midland 6db whip antenna that is supposedly cut at the correct height? What are the gains and losses of either choice?

[@TheNotaRubicon]

I went with a UHF antenna that requires manual trimming because the GMRS/no-trimming antenna that I wanted was out of stock.

[@Sean-sj4hv]

@@TheNotaRubicon Thank You for the reply. What antenna did you originally want?

[@tylercourtney7770]

@@TheNotaRubicon Morning! The Midland 6DB whip vs the short stubby 3DB gain. I am not sure if I am understanding this correctly. Does going from 3DB to 6DB “double” the range and or power?

[@gphilpot1]

I noticed my antenna mount is solid metal. Also my antenna base is metal. Assuming it electrically becomes the same when connected to the mount. Does does the antenna mount need to be chassis grounded?

[@joeglennaz]

Great video thank you so much love from Phoenix Arizona I’ve been enjoying your videos

[@dirttrekking4321]

Thank you for this video. Very informative, helped me set up my GMRS antenna very easily.

[@mattdwight2106]

Great instructional video. One question. I used your link to purchase the SWR meter and it arrived a few days ago and I'm finally getting a chance to use it but the adaptors it came with dont fit onto my antenna nor the back of my GMRS unit. What other adaptors do I need to buy? Thanks

[@BigGoad]

Depends on what radio you have. Amazon and ebay have a ton of kits for different adapters, or you can search specific. Some common connectors are PL-259, BNC, SMA male, and SMA Female. I have the same little meter, or one like it and it had everything I needed except for one to go to PL-259. What model radio do you have?

[@georgespeck8761]

Thanks for the great information about the antennas.

[@raychandler2757]

Answer to newbie questions I had. Thanks.

[@samuelmcgill-rl3lb]

wouldnt a grinder or drimmel be a little more accurate ?

[@JahazielCruzPLUS]

Love it thanks for the INFO!

[@wildercreekhoney]

What's the best placement on a vehicle? Installing one on a Nissan Frontier and undecided if I should mount on tool box, roof, or hood of vehicle.

[@TheNotaRubicon]

"Best" is always highest spot, center.. But any place will work with little noticeable impact.. Mine is mounted in pretty much the worst possible location (low, rear corner) - the experts say it wont work at all - yet i can talk to my wife in her jeep, also with a bad antenna location, over 30 miles away.. So what I have learned from this is that the "experts" are idiots.

[@gussuk11]

Thank you for another great video. Questions. The browning antenna you show obviously requires the purchase of a base for it to screw on to? What about the length of the antenna wire does it effect the SWR? I just purchased a UV9G ( and made sure you got credit for the sale) and want to use it at home with an antenna on the roof. What kind of antenna do you recommend for that? I have been told to use a Discone is that the best idea and what about a ground plane? If I use one of the mobile antennas do I have to mount it on a cookie sheet like you did? When the OEM antenna is mounted directly to the radio what is the ground plane then? Thanks for your help.

[@jdsmaintenance]

Are you recommending to not coil, or loop, up the extra antenna coax cable to avoiding unwanted high SWR readings? Thanks!

[@robdurham7974]

I have a radioddity 20 watt that I use as a base station. I have a laird 5db xs 2 1/2 wave ant set up on the second floor of my house. I have not trimmed it and on repeater channels I get a swr of 1.01. on my simplex channels I get 2.58. I only use my repeater channels. SHould I bother adjusting my ant or am I good to go.

[@TheNotaRubicon]

2.58:1 is not a "great" SWR, but I would not bother messing with it.

[@theoutdoorsliving3949]

First I want to thank you, your videos have been very helpful for me since I just got into GMRS. I have a video suggestion!! Can you make a video where you show and test different antennas, an antenna shootout if you will. Btw I just order me a Wouxun KG-1000G thank you your recommendations.

[@tedman2535]

Lmao. “The instructions... that you didn’t throw away.”

[@JoseRamirez-dr5xk]

Question: when u tune a gmrs antenna on a vehicle will it work ok when you use it on a diff vehicle?

[@TheNotaRubicon]

For the most part, yes.. However the SWR could be different on the other vehicle due to a different ground-plane, connections, etc so its always good to check the SWR.

[@joeglennaz]

Great video thank you so much! Hello from Phoenix

[@full_metal2452]

I assume that you will eventually get to the point it will go back up without ever hitting the perfect 1.0/1.1?

[@john-nn6u]

Yep - if you keep making it shorter and it starts going back up, stop cutting! You've gotten it as good as it's going to get (and then made it slightly worse).

[@timothysheppard3276]

I have a side by side with a plastic roof, if I mount a 12x12 steel plate to the roof, should I install a ground strap to the roll bar? I am going to use the 6db gain midland antenna with magnet mount so it will give me a break away point if it hits low trees. I really appreciate your videos.

[@TheNotaRubicon]

Connecting it to the cage with a strap (not a wire) wouldn't hurt, but probably not necessary as long as you have at least 4-6 inches of all around the base of the antenna.

[@billgross3579]

Doesn't adding the SWR meter to the antenna increase the antenna length and hence affect the SWR?

[@TheNotaRubicon]

Not very much on a mobile-radio setup as you're only increasing the length of the feed line, not the electrical length of the antenna.. On a hand-held radio though, it can make a significant difference.

[@legallimitoutdoors9917]

So if I have a antenna that came with my radio and it was a 144 - 430 mhz. From Factory and or another antenna That's rated that megahertz could I still tune the antenna

[@andrewyoung-n8ary]

Nice layman’s explanation. Many people would benefit by listening to these tidbits. I cringe every time I hear myths about SWR, co-ax lengths, etc. Many radios will reduce power at high SWR, luckily.

[@sopmod556mm9]

You can also use a grinder.

[@ucdesigns396]

Thanks for this video. I went out and got the SWR meter you use and I just love it. Works fantastic. On trimming the wire, I bought a Nagoya NMO-200C that they advertise as not needing any tuning for GMRS... Well, I put this up and the SWR without touching it, on channel 1 was 1.9 and 22 at 2.6. So yea, didn't think that was true. So I've taken a half inch off of the top rod and have it down to 1.86 and 2.0 respectfully. So while it is coming down, do you just keep trimming until it comes down? I don't ever recall trimming that much off an antenna but guess so. And I trim using the grinder too. Works fast.

[@DavidAllen-hc2pf]

I’m new to GMRS. Dose the antenna need to have the spring/coil in/on the antenna?

[@TheNotaRubicon]

If the antenna is designed/tuned to work on GMRS with a spring/coil/anything on it, then it is not recommended to take any pieces off.

[@joecromer9710]

I just received my GMRS license, what would you recommend for a base station antenna. I plan on using the Btech 50X1 radio. I hope to hear from you. Thank you

[@leskobrandon538]

Awesome video and info for the meter!.. Check the antt grounding, that's the biggest problem

[@Emanemoston]

Thanks for the video.

[@htdriver2012]

When you buy a antenna that is made for gmrs, are they not pretuned?

[@eatmelily]

yes

[@ghosty6201]

Pretty new at this but unfortunately at my workplace you gotta take initiative to get shit done sometimes. Anyways we have kng-m150, with the MWV1365S, permanent mounts on the roof of the vehicle for most and others having a longer antenna from the hood. Having PA VSWR issues some will go into low power others wont allow transmit at all. So try antenna, grounding, and then the coax cable? For example, we swapped antennas and still got vswr fault so thatd rule out antennas. Then a swr meter would help me confirm a coax cable problem is that correct? Also our frequencies range from 154 to 171.5, our most used channel is at 166.9. Thatd put the middle at around 162, but itd be quite a bit of work to change our 171.5 repeater channels. I imagine we could just aim for our 166.9 channel to have the least swr since our 154 channel is hardly used either.

[@coryehrler2132]

Where did you get the adapters for the antenna cable and for the radio to meter?

[@TheNotaRubicon]

I get all my stuff from either BuyTwoWayRadios.com or Amazon

[@Anthony-bt2vo]

I’m going to get one of those SWR power meter but where did u get the tow lp-259 adapters?? Plz let me know

[@leopoldomolina1763]

What happens when you think you got the lowest SWR but actually cut more than irreparable? Does the SWR measurement start increasing back again?

[@TheNotaRubicon]

Yes.. thats why you cut in tiny MM increments.. and dont get greedy.. leave well-enough alone once you get around 2.0:1

[@NickWindham]

Your question was exactly what I was thinking. I know me, I would struggle to leave well enough alone until below 1.5. Maybe after the SWR starts rising, you could solder the previous tiny bit back on?

[@Lacquay]

What happens or what would an SWR Meter read if I cut an antenna too short (cut too much off)?

[@TheNotaRubicon]

if you are too long or cut too short, the SWR would start to read high.. the shorter you cut it, the higher.

[@johnhamilton4449]

At some point when you cut, the SWR will go back up. This is the whole reason for cutting little pieces at a time (1/4 inch). When you reach that point, just extend your antenna back up. There is usually at least 3/4 inch of adjustment area in the base.

[@joezahn7334]

Hello! I have a Midland MXT400, 6 meter antenna cable and 6dB gain antenna (mxta26). Using a Surecom SWR (sw-33), with the radio set to low power, the SWR reading is 1.05. I think I've cut the antenna too short. Can anyone confirm my belief, or is the reading acceptable? TIA

[@TheNotaRubicon]

1.05 is near-perfect. .Dont touch it anymore.

[@flpirate4565]

Thanks Randy,very well explained.

[@mikeramsey9747]

Good video, but have you made one on a Dual Band Antenna (UHF/VHF)

[@deniseblack3499]

I have the Browning like you have in the video it's 5/8 ths wave by 5/8ths I don't have the meter or the list to trim it I use gmrs c

[@kevinmiller6154]

Pl259 connector or the cable your showing does not come with the swr meter in the link you provided. Did you make it up? If so what length would it need to be. Thanks! Im running btech 50-2

[@kevinmiller6154]

Its a jumper im assuming

[@williampierce6554]

Just ordered my first gmrs mobile radio for my truck. It's gmrs repeater capable, and scans uhf and vhf ham. My question is what's the best antenna for this? Should it be dual band in order to pick up the other frequencies? Thanks in advance

[@TheNotaRubicon]

If you're going to be talking on GMRS and scanning ham VHF, then yes, a dual band primarily tuned for GMRS (462-467Mhz).. If you're going to be scanning ham 70cm, then a GMRS tuned antenna will be good/close enough

[@williampierce6554]

Thank you. I enjoy your channel. Very informative. I appreciate what you're doing . Much respect.

[@AyatollahOfDahmsistan]

The, best channel!

[@EricSmith-mx7ol]

In my Mazda Miata, I installed a midland mxt275 with the standard (not ghost) antenna that is included. SWR pegs the meter all the way into the red. No coils or pinches. I even took it out of the car and set up inside like you did with your MXT275. Still pegs the meter. Suggestions?

[@TheNotaRubicon]

Fully into the red usually means a short - Check your wires and connectors. if they look good then something is seriously wrong somewhere that is far beyond the scope of youtube comments to get fixed.

[@lh9053]

Really good video, thanks for explaind clear and easy.....also do you recommend the MIDLAND MXT400? Thanks and have a nice day.

[@skalbert12]

If you over shorten, you can solder a piece on the end

[@n6vcw]

Soldering stainless steel? Welding, maybe, but soldering???

[@scottbruffy5961]

the SWR meter you recommended shows the use of a "test jumper coax" in the instructions, but not included in the box? Where do I find that coax cable?

[@TheNotaRubicon]

You will need a short "jumper cable" - You can find them on Amazon, at your local radio shop, or you can even make your own. Just make sure that it has the correct ends/connectors to connect to your specific things that you are connecting to.

[@scottbruffy5961]

@@TheNotaRubicon thanks, I purchased the Wouxun KG-1000 per your recommendation, got it installed and want to check the attenna, i'm having trouble finding the right connections to fit. Can you recommend via Amazon?

[@johnheadley7650]

Please let everyone know the SWR meter needs adapters to PL259 or other midland/ coax connections. . .

[@marksday4936]

Thank you for the video. Great production and clear cut information. I'm just getting into GMRS. My knowledge comes from CB (years ago). Do you have videos regarding grounding antennas? And coax lenth? F150 are all aluminum now (not conducive to magnetic mounts 😂. Thank you.

[@LVJMotorsports]

Great Video, Thanks for breaking it down.

[@harlanhair9893]

Great video😃

[@1fishinghuman208]

Very informative. Thanks.👍 Question: I just got finished tuning my new mobile radio and antenna, a KG-1000g & Midland w/magnet mount GMRS antenna. I have my SWR good at 1.02 across the channels on low power, but when I switch to HI power my SWR jumps to 1.6 to 1.75 on all channels. Is this normal or a problem? Thanks

[@TheNotaRubicon]

Because SWR is a ratio, it should remain the same, no matter what the power level. 1.6 - 1.75 is fine, and not an issue, but it my guess is your SWR meter is not that great..

[@1fishinghuman208]

@@TheNotaRubicon thanks. My meter is a Surecom SW-102. I don't think I'll make any more adjustments for now. Thanks again for the very informative videos.

[@tomwilliams8675]

Thanks Randy, good video.

[@thomasdwyer1654]

Are there better antennas then others?

[@htdriver2012]

Hi there. I just installed a Btech 50x1 radio with a Browning antenna. I purchased an swr meter like you use and right from the start on GMRS channel 16 it was 1.0. When I went to Repeater channel 16, rechecked the swr and it showed 2.0. Is this correct or should I try cutting the whip some to bring it down? Thanks

[@TheNotaRubicon]

Regular channel 16 transmits at 462.575.. Repeater CH 16 transmits at 467.575, 5Mhz higher, so you need to tune the antenna the best you can for both frequencies - you will probably end up with 1.5 for each.

[@greg1516]

Thanks Randy

[@shadowstalker130666]

What about the small stubby antennas that are enclosed in plastic?

[@TheNotaRubicon]

Those cannot be tuned.

[@notwrkn2mch]

On the BR-450 antenna if you know...... would my big old magnet mount from my Wilson 2000 accept that antenna?

[@eijentwun5509]

Ok Genuine Question... Why on Planet earth...if I bought a Specific GMRS antenna...which I assume is Tuned FOR GMRS (arent all GMRS frequencies exactly the same on all GMRS radios)...do I then Have to tune it myself? then why even buy a GMRS antenna???? what am I not understanding here?

[@TheNotaRubicon]

If you buy a UHF antenna, you will need to tune it. If you buy a GMRS specific antenna, you should not have to tune it, but, you may still have to.

[@lisacrews4788]

My SWR is 1.3 but if I Whistle in it it goes way up like 3.5 is that normal