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- Опубліковано 30 тра 2018
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Tom - Наука та технологія
The output wattage is correct and accurate with the dummy load. The high SWR causes the false watt reading. Great video / review of this Surecom SWR device ! I want one :-). Thanks
Thanks for the info.
mine has a third bottom option , what does that do ?
I like how you spoke your callsign every time you transmitted into the dummy load lol
Habit
@David Gold » Yeah, it gets to be a habit, I recon. I _never_ give my call sign when testing. The FCC will probably knock in my doors some night and drag me screaming and kicking from my house!
Try holding the black box like it says in the instructions. I get a lot better reading with SWR when I do that.
The power reading is TOTALLY USELESS as Raymond stated unless you have a perfect match ! I just purchased one to measure SWR to get a ball park figure because its small and much more easier than dragging out my HP stuff. Like they say "you get what you pay for". TNX 4 the upload
73 N8AUM
Hi
can i keep this swr meter in permanent situ with the external antenna connected?
Neat lil' SWR meter, reasonably priced!
Thank you, Sir.
You are very welcome and have a great day.
Neat little device for the shack.
Thanks Tom. 73's
You are welcome.
I watched another video that this meter also showed high SWR. Are all the antennas de-tuned, or is the adapters and meter on a rubber duck causing the de-tuning?
My experience is that rubber duck antennas have high SWR.
Thank you for the positive review. I'm curious, would this equipment be suitable for testing both my 25-watt and 45-watt base radios, or is it designed specifically for portable radios? Your clarification would be greatly
Yes, is should work fine on your base station radios.
@@hamrad88 thanks 👍👍👍
@@SecretMan299 you are very welcome.
just got the Mark II of this same model (difference is the Mark II has ONE more mode: ref(lected) power, bottom horizontal segment lights up). I have 3 aftermarket antennas as well as the included antenna for my UV-5RIC (Industry Canada certified). The included antenna is the second version (tapers to the end, not like the first edition that didn't taper and was always reported as being horrible).
Testing on the meter showed the included antenna
Thanks for the detailed report and have a great day.
just got one today works well found out my telescopic antennas have the best swr`s the factory ones suck. and after market antennas are ok.good little meter. but may want to do same test outside away from buildings.
Thanks for the report and have a nice day.
Interesting. When I was testing on my antennas, it triggered my paper shredder. That was weird.
I'm not sure you need to identify yourself when you use a dummy load, and when I test my equipment, I never bother with identification as most frequencies are unused in my area (Washington, D.C., suburb). I do a lot of scanning and there isn't anyone on the frequencies with the exception of a HAM repeater that's fairly popular. Oh, there are also two things about the SW-102, SW-33 and SW-33Plus. First, all of these meters test crazy high SWRs as is. The new SW-33/+ has three settings: 1) power, 2) SWR, and 3) reflected power. You also have to cup your hand around the meter and the radio when you take the reading. If you take the time to identify, your battery life will suffer. I generally transmit 3-4 seconds using a dummy load and five seconds using an antenna. And all of my Surecom meters test very high on antennas, even with Nagoya antennas! Power readings seem okay some of the time, then inexplicitly comes in very low. I'm hoping the 33+ does a better job. Again, try cupping your hand around the meter when you take your reading. It or may not help.
Habit
Thank you for this video! If you read the instructions for the sw33 it states that you need to touch the box when testing. It brings it down to 1.01 without touching it it's 1.67. Did you try the same thing? Touching the Box while transmitting?
Yes and as I remember it made little difference.
@@hamrad88 thank you for responding.. The big question is if I trim/tune the antenna will I be trimming too short if I don't place my hand on it the box?
@@ralphperez2735 Only suggestion I have is to compare it to other meters that maybe someone else has.
Thats why I dont use stock baofeng antennas, get and test a nagoya antenna they are much better. Thanks Tom
You are welcome.
Yeah genuine Nag's are hard to beat!
Watch out for knockoff nagoya's they are rubbish, coat hangers work better.
The manual says you should touch the SW-33 unit when you take a reading. Which you did not. This greatly affects the SWR reading.
Thanks. You are correct. My bad.
How's the little meter reading? Im interested in one for my ht's and FT-817nd kit. Thx mike.
My limited testing show that it is fair.
I have one of these and been using with good results. Put up a new external base antenna today. The SWR was 1.01 and 1.07 at the top of the GMRS channels. So I am very happy with that. While checking the Power wattage using this meter, have you compared the power readings from this meter to another one? The power reading using the dummy load works fine. When I put it on a radio that has a High and Low setting, the high should be 50 watts and the low at 5 watts on my radio GMRS 50X1. The high setting shows 15.5 and the low at 4.9. I can't seem to get the power to read 50 on this meter. The radio screen itself shows it is putting out high power but not sure really what it truly is.
I can't remember for sure but it seems like it can only read output power accurately up to 15 watts. My memory ain't what it use to be. LOL
Would you make video with your sw-33 with the VHF Frequency..
140mhz to 174mhz
The radiated power of the antenna may differ from the power input. With antennas like this, they can get a low swr by making them having a high loss. An extreme example, take a dummy load put a small antenna on it. I will give a low swr a good power input but very radiated power. This is in part how some of the antennas are designed so as not to damage the radio no matter what you do.
As another example. Take a long transmission line to the antenna. make it with a very loose cable. If you look at the SWR going into the cable lt will show a low SWR. No mate what you put as an antenna you will show a low SWR. The outgoing and the reflected wave are attenuated. Low reflected wave = low SWR. This is why scope probes will be 10X to minimize problems of impedance matching.
Would be interesting to see what its like on 2 meters with different antennas. Im tempted to buy one already!
I will try to do that in an upcoming show.
Same result of mine if am on UHF using stock antenna. Reading around 3swr. But if vhf I can get 1. Weird😅
Boy your voice went low at 4:43! Good for singing bass in a vocal group!
I thought Satan had taken over Tom's body! Terrifying.
i thought it was some kind of prank. the lighting changed to more red also, indicating redshifting into the evening, like some significant time passed
Yes my tests proved the same or similar results to yours. Basically the standard baofeng antennas are no better than coat hangers, the only usefull part of the frequency for these antennas was in the lower 2M 143 mhz range where i could get the swr down to 1.1- 1.5 apart from that its only good for receive for everything else and even more totally useless in the 430-520 mhz range. The surecom swr meter works ok, more than i can say for the rubbish baofeng antennas, i even tried a longer Nagoya knockoff and that was no better in reception or swr so that got binned straight away.
Had some interesting results today after ordering a small mag mount from ebay for about $11. Model: UT-106 This little antenna with its tiny 1" mag mount actually surprised me with far better results than the stock baofeng antenna! SWR was down to 1.1 to 1.5 in the upper 150-170 mhz and although not great in the 477mhz range far better than the baofeng antenna. Using the SW33 meter . Although not a coclusive test as it was done under a carport but the results made far better sense than what i got from the baofeng antenna which was all over the place. FWIW :-)
Thanks for the report and have a great day.
Thanks for the great review! :)
Obviously the antennas are not very efficient.
Might make my own by calculating the wave length by 1/4, 1/2 , and / or FULL....
i remember the days of CB (27Mhz), and full wave length for that was 8ft 9inches, if I remember correctly....
Thanks
1/4 of 11 meters you mean.
FYI, 1/4 wave for chicken band is around 9ft.
Well now it looks like I have yet another bunch of tasks for my 3 BaoFeng radios...
just got mine; how do you know when it's fully charged?
I think the charing light changes color.
@@hamrad88 that's what happened; thanks
why dummy load is different than original antena? I mean the reading..
in theory the antenna should be 50 ohm to match the 50 ohms resistance the radio requires to be able to transmit max power efficiently out of the antenna. Ohms law...higher resistance means higher impedance to the flow of current thus increasing the SWR. The SWR is the back-flow of energy that was unable to leave the antenna and reflected back into the radio. Usually the problem of the antennas resistance is higher than 50 ohms or its not the right length physically or electrically.
Sir can you make a video that you are testing this surecom swr33 in an external antenna? Pls sir..thank you
It would be exactly the same process.
Did you even compare it to a reliable VSWR meter?.......I’ve got one of these and I don’t really trust its readings
Yes, it was within 10%
There handy but 10% is a lot...just saying I’ll use them,but I’ll find someone with a calabrated vswr and check....though I must say I haven’t fried any radios with it, however my 2bmeter yaesu reads higher than the shurecom, however hams are cheep ar#es, and I’m a poor cheeparse ham lol, I’ll be putting away sheckles for a good analouge vswr