@RCModelReviews @4:13 into the video, there's a fix to this problem. You can get some AWG 19 gauge solid copper wire and bridge the gap. the 19 gauge solid wire fits nice and snug in the hole. It's essentially creating a pin. It works like a charm
Really helpful! Just today I actually was about to buy a 5.8ghz Boscam TX/RX and some 5.8ghz cloverleaf antennas off of HK when I saw this video pop up; so I checked and sure enough the antennas were SMA!!
So true... I have a box full of them. However, be warned that some of the converters on the market are not such good quality and can cause noticeable signal loss.
Thanks Bruce. It's all as clear as mud now. My worst problem has just become focussing my eyes on the blooming things. I'm ordering a good quality magnifying lens to hang around my neck.
Yes, I've read that too. Although Bruce tells sma is used for wifi, all my wifii stuff has RP-SMA connectors. For rc I try to avoid it at all cost. Just don't buy it or resolder an SMA connector on it. Don't use cheap adapters, they are crap.
4:48 Thanks for the valuable knowledge. Great video sir. Btw, I was wondering, shouldnt there be a 2-sided sma pin? As an adapter( like a tiny pin) For these 2 rp-sma adapters.
Thank you Bruce. So what is it now? For us that modify our rc's to get better range. On the transmitter use a male connector. That's one that has a pin sticking out of the middle of it . Am I right?
Another advantage is that RP-SMA will have the the male pin and the male screw on the same side to confuse less over what side is called male and female. right?
I just noticed your soldered bridge on your VTX :D .. stupid reverse polarity protection diode gone pop because you looked at it the wrong way on a Thursday morning?
***** Great idea. I read on some forum that more power outgoing from antennas equals more sensitivity to wrong placement of equipment. And this way more power from VTX antenna may reduce total range of plane from pilot. There was also written that most if not all low pass filters which are sold for RC, silencing significantly also desired band and they are simply reducing all power outgoing from antenna. Is it all true Bruce/xjet?
Question. I have lost my standard 2Dbi 2.4Ghz FrSky Whip Antenna. (Been using a 7Dbi Patch Antenna) Can I use a 5.8Ghz whip antenna from my spare 5.8Ghz Tx (Gone to Clover Leafs)??? Or will I have problems with this??? Thanks in advance for any advice.
PLEASE HELP!!!!! Hi can you clear something up for me my transmitter is RP sma boscam and my skyzones goggles are sma so if I buy sma antennas and use a adapter so one of the sma antennas fit the rp sma transmitter will I lose much signal and range is this setup fine. Do I just need to buy a sma transmitter so both are sma.
Female to female adaptors on eBay. Two pins with a short piece of solid wire soldered into them... These are WORKAROUNDS --- best practice is to use the proper fittings, but if you have these adaptors in your kit, and are caught out in the field with someone facing the matchup problem you can look like a hero. In Ham Radio we have seen SMA and now starting to see RP-SMA. Your "reason for it" was the first I've heard... I'll pass that along to my students who complain. Sounds as reasonable as anything. Cheers, Bob WA8YCD
+Bob West Thanks, I figured using an adaptor to mount my SMA bluebeam ultra onto a black pearl would effect the range. Wondering how drastically it might effect the antennas range? Should i just trying building my own antenna with the proper connector?
Yeah I ordered some of the RP-SMA extension cables and HobbyKing sent the wrong ones (SMA) , now I,m still waiting for the correct RP-SMA cables to arrive that were supposedly shipped on the 15 Nov 2013 :-(
Very insteresting explanation. Can you solder a rp sma conector to a coaxial cable. I want to connect an omnidirectional antenna to extend the range of my router. I'm in Mexico and is very hard to get reliable information and components down here.
Hi great video! I been using a 300mw booster by Sunhans with two antennas a 5db 9db for my Syma x5sw and x8w. The x5sw flies out to 400m + now and my FPV works well beyond that. The FPV system is RC832 RX with a Anbee clover antenna and a Crazepony FPV micro AIO..40CH 25mw TX. I never really made sure that every thing was RP-SMA or SMA. I thought my booster was RP-SMA then watched you video and checked turns out that it's SMA. Sunhans booster came with an adapter I did not think anything of it I just use it to make sure all the pins plugged in correct. It work great and I have a strong signal. I hope that all made sense:) So do you think that I would be fine using a SMA booster with RP-SMA antennas? Like I said everything plugged in nicely. Thanks again!
Awesome explanation. Certainly cleared up my confusion. Thanks. One suggestion where you would use both SMA & RP SMA. Some TX & RX antennas can be different. So you could use SMA on say the TX and RP SMA on the RX. Just an idea.
The intent behind creating RP-SMA was to comply with specific local regulations. The manufacturers had to make a new non-standard antenna connector for their WiFi devices that was hard to find replacements for (as they were all regular SMA before that), to prevent consumers from connecting antennas with gain and therefore breach compliance (fromWikipedia). So they just simply swapped the locations of the center pin and hole between the male and female connectors, it's nothing to do with the pin being a target for rough treatment in SMA gear
+Colin Ormrod Clear story about SMA and RP-SMA….BUT i still have one question for you: Can i use a Video TX with a RP-SMA antenna and on my goggles receiver an SMA RX with SMA antenna? will those 2 work together or not? or do i need to have RP-SMA on both TX and RX to work together? would be great if you help me out on this question…dumbs up and thanks in advance…greetings from Amsterdam, The Netherlands
And i tough the difference was just due to a Brand* reason. & i made the same mistake, luckily i was park flying. So now i verify if my flybox is filled properly before flying. Thank You Professor
Thanks for the explanation -- that was helpful. One question: What do you do with the nut and washer when you're connecting an RP-SMA? Do you just ignore them if you're not mounting to a bulkhead/panel?
I just ordered a Kia Deng K70C quad, hasn't arrived yet, but doing more research I've found there have been several fly offs, the antenna in the radio and quads is only a short wire, how could I install a 2.4 antenna on the transmitter and the quad and not lose DBS
Another thing that I'm guessing is commonly misunderstood are the numbers attached to motors, particulary when motors are described as "450 series" or "250 series", etc. etc. Is there a reference table that simplifies this practice? Thanks.
Thanks Bruce - another great video. I am trying to set up my FPV base station to be able to fly from within my car given the temperatures in my part of the world at this time of the year. I ordered SMA extension cables, but was sent RP-SMA cables which of course didn't work for my Dragon Link and 1.2Ghz video system. My question is (and I had hoped you would touch on it in this video) "How long of an extension (SMA) can I run for my Dragon Link and 1.2Ghz video receiver, to get the antennas up on the roof of my vehicle from inside the cab?" Does one lose signal strength with the increased resistance of adding too long of an extension? I was hoping to extend about 1.5 meters. Of course, I could set it up and range test, but I thought you would have some insight. Thanks again for the greatly informative videos!
A 1.5m extension lead shuldn't hurt too much. Yes, longer cables do introduce some additional loss but at 1.2GHz the loss isn't too great if the right cable is used.
I was wondering if there's a bottom to the female part of these connectors. ie, if I could just use find an appropriate length and width of rigid wire and use it to bridge the gap when joining female SMA to female RP-SMA. Effectively adding just a pin between the two female components. If there's no bottom or landing to the female connectors, then that would be no good as your pin would probably go all the way though to one side and not necessarily making a good contact with one of the connectors. I'm not so much looking to save money here, more space and possibly weight on micro multirotors. Thanks for the vid, I had discovered the difference some time ago, but hadn't understood it.
I have an amazing mix of TX and RX with both SMA and RP-SMA. From a technical perspective there is no quality difference. Most 2.4 GHz RC TX use RP-SMA and most, but not all, UHF (LRS) systems use SMA. With video TX/RX systems, it depends who makes them. It pays to have an SMA to RP-SMA adapter and an RP-SMA to SMA adapter in the flight box just in case. Not forgetting to make sure that your antenna is the correct one for that frequency!
Thank god , If I had done this nobody would have seen it Bruce. Another useful 10 min bit of brilliance would be thrust measurement and the subsequent spreadsheet one generates The means and the method. Everyone needs to do their own data matrices
Hi all.. I have a question about a dual antenna mod. What if you use a T shaped RP-SMA connector at modified transmitter and connect two 50 ohm antennas together in parallel? Is it gonna help to increase range? And would if affect badly on the Tx as you're playing with the antenna impedance? Thanks.
Excellent - thanks Bruce :) Just got a few parcels in of various things, and I did what I usually do and not put everything back into it's correct box. Was faced with "um... which antenna now goes with which little black box?" Didn't realise (or more to the truth, look closely enough), but the now I've got a heads up on SMA v's RP-SMA, I'll know how to tell which boy bit goes with which girl bit. Brilliant :D (or should that be 'brullyant'?). Fanx.
If you've got antennas on different frequencies but they all look like those little black ones -- put some masking tape on the base and write the frequency on them. Without an analyzer -- or without pulling them apart, there's no way to tell what frequency they are designed for otherwise and putting a 5.8GHz antenna on a 2.4GHz system (or v/v) will produce problems -- regardless of whether the connectors are the right type or not.
amazing they were so smart to make it like that for such an inane reason but came up short to make them look different to we can easily tell which is which. eg, different colour or shape or even different size threads? A small length of solder works well to connect a RS-SMA female to a SMA female connecter. Make it slightly longer so it squashes in nice and tight.
for me im gonna use rg316 with an rp-sma for my wifi extender that has been fckd up and previously using sma but needs to solder on its terminal. i bet i wont have any problem with this. Thanks Mate
Working at Jaycar, you should see the look on some peoples faces when they ask you for a SMA connector, and you ask whether it's a reverse male, reverse female, or just regular male/female ...
now the antenna screw threads are female and the pin is the female and the radio side is male for threads and male for the pin.. it keeps the sexes completely separate.
I thought the antenna damage excuse was a far too lame of an excuse to justify totally screwing up what WAS a standard, so I looked it up and found this on Wikipedia. Blame the freaking bureaucrats as usual: "Because they were not readily available, RP-SMA connectors have been widely used by Wi-Fi equipment manufacturers to comply with specific local regulations, such as those from the FCC,[10] which are designed to prevent consumers from connecting antennas which exhibit gain and therefore breach compliance. The FCC considered that the RP-SMA was acceptable in preventing consumers changing the antenna; but by 2000 it regarded them as readily available,[11] though delaying its ruling indefinitely.[12] As of 2013, leading manufacturers are still using RP-SMA connectors on their Wi-Fi equipment.[13]"
Sure now you tell me, I was so exited to get my new 1.3ghz skew planer antennas I didn't notice they were the wrong ones and I couldn't figure out why I had no range. DAAAAA!!!
A third wave feminist invented RP connectors. Unfortunately putting the male pin on the appliance and the female pin on the cable means that the expensive equipment is now more likely to get a damaged pin than it was before and the cable (which is cheap and can be reterminated easily) is now needlessly ruggedised. If you are rough with your cables it is because you don't care so no need to change it. A colleague of mine damaged the RF port on a satellite modem and the modem cost $5,000 to repair in order to keep the warranty. Maybe just keep the appliance female.
RP-SMA is stupid stuff - avoid at all costs,. It was introduced to make it difficult for the layman to attack commercially available hi-gain antennae to WiFi routers, voiding the EIRP guidelines. Silly, as if there would be no converters, ever. Anyway, you don't want an RP-SMA on your transmitter or other equipment, because
Excellent, easy to understand. You are our saviour in this djungel of antennas.
I now really get the difference between SMA and RP-SMA. Thanks!
@RCModelReviews @4:13 into the video, there's a fix to this problem. You can get some AWG 19 gauge solid copper wire and bridge the gap. the 19 gauge solid wire fits nice and snug in the hole. It's essentially creating a pin. It works like a charm
Really helpful! Just today I actually was about to buy a 5.8ghz Boscam TX/RX and some 5.8ghz cloverleaf antennas off of HK when I saw this video pop up; so I checked and sure enough the antennas were SMA!!
I think it's worth mentioning there are SMA/RP-SMA adapters you can buy.
Never hurts to have a couple laying around.
So true... I have a box full of them. However, be warned that some of the converters on the market are not such good quality and can cause noticeable signal loss.
thechosendude true
Thanks for the info. Finally cleared that up!
Well this really cleared things up for me I was so confused. Tanks I really appreciate you putting this video out.
Thank you sooooooo much for this video. I was so confused trying to figure out what my IP camera was, rp-sma or sma.
Thanks Bruce. It's all as clear as mud now. My worst problem has just become focussing my eyes on the blooming things. I'm ordering a good quality magnifying lens to hang around my neck.
I read somewhere that the RP was created when wifi hubs were introduced to 'stop' people putting better antennas on them, FCC requirement apparently
Yes, I've read that too. Although Bruce tells sma is used for wifi, all my wifii stuff has RP-SMA connectors. For rc I try to avoid it at all cost. Just don't buy it or resolder an SMA connector on it. Don't use cheap adapters, they are crap.
man, you have a video for all of my questions. thanks so much.
Good information for antenna connectors.
4:48 Thanks for the valuable knowledge. Great video sir. Btw, I was wondering, shouldnt there be a 2-sided sma pin? As an adapter( like a tiny pin) For these 2 rp-sma adapters.
Great video and a simple explanation!!!
can i connect two rp-sma (females) connectors by inserting a small piece of copper wire???
Yes, you can.
wow thats for the info it was driving me crazy now i can get the ones i need
Thank you Bruce. So what is it now? For us that modify our rc's to get better range. On the transmitter use a male connector. That's one that has a pin sticking out of the middle of it . Am I right?
do i need special crimps or anything else to repair these? Or any other recommendations on tools?
good video, thanks Bruce, I didn't know about that
Thank you for the video. It was most informative!
Thank you for this video and I would like to ask if a adapter is available to change over.
You are such a great help, and a hero to the hobby. Thank you for all you videos
Marc
Is it possible to convert a sma antenna with rp sma vtx with adapter or would it be worth investing in a new one?
Another advantage is that RP-SMA will have the the male pin and the male screw on the same side to confuse less over what side is called male and female. right?
I just noticed your soldered bridge on your VTX :D .. stupid reverse polarity protection diode gone pop because you looked at it the wrong way on a Thursday morning?
No, that's the way it came!
***** Great idea. I read on some forum that more power outgoing from antennas equals more sensitivity to wrong placement of equipment. And this way more power from VTX antenna may reduce total range of plane from pilot. There was also written that most if not all low pass filters which are sold for RC, silencing significantly also desired band and they are simply reducing all power outgoing from antenna. Is it all true Bruce/xjet?
great video Bruce, very useful =D
Love these info videos mate, keep em coming please :)
Brian :)
Instead of a weighty extension can I cut a stinger from rg59 coax and insert it into the ant?
Awesome as always!!...:).... thank you for the explaination
Hi Bruce, having an antenna with the wrong type connector, is there any major drawback in using a SMA to RP-SMA adapter to connect the V-TX?
A good quality converter should cause no problems. There are some cheap ones however, and they can cause some signal loss.
Question. I have lost my standard 2Dbi 2.4Ghz FrSky Whip Antenna. (Been using a 7Dbi Patch Antenna) Can I use a 5.8Ghz whip antenna from my spare 5.8Ghz Tx (Gone to Clover Leafs)??? Or will I have problems with this???
Thanks in advance for any advice.
PLEASE HELP!!!!! Hi can you clear something up for me my transmitter is RP sma boscam and my skyzones goggles are sma so if I buy sma antennas and use a adapter so one of the sma antennas fit the rp sma transmitter will I lose much signal and range is this setup fine. Do I just need to buy a sma transmitter so both are sma.
Female to female adaptors on eBay.
Two pins with a short piece of solid wire soldered into them...
These are WORKAROUNDS --- best practice is to use the proper fittings, but if you have these adaptors in your kit, and are caught out in the field with someone facing
the matchup problem you can look like a hero.
In Ham Radio we have seen SMA and now starting to see RP-SMA. Your "reason for it" was the first I've heard... I'll pass that along to my students who complain. Sounds
as reasonable as anything.
Cheers, Bob WA8YCD
+Bob West Thanks, I figured using an adaptor to mount my SMA bluebeam ultra onto a black pearl would effect the range. Wondering how drastically it might effect the antennas range? Should i just trying building my own antenna with the proper connector?
Yeah I ordered some of the RP-SMA extension cables and HobbyKing sent the wrong ones (SMA) , now I,m still waiting for the correct RP-SMA cables to arrive that were supposedly shipped on the 15 Nov 2013 :-(
Very insteresting explanation. Can you solder a rp sma conector to a coaxial cable. I want to connect an omnidirectional antenna to extend the range of my router.
I'm in Mexico and is very hard to get reliable information and components down here.
Can I get more range out of my transmitter if I put a cloverleaf antenna on it. By transmitter I mean my radio for
My model
Does the connecter determine the polilrization of the antenna as far as left or right?
No.
great info, thanks for sharing
Hi great video! I been using a 300mw booster by Sunhans with two antennas a 5db 9db for my Syma x5sw and x8w. The x5sw flies out to 400m + now and my FPV works well beyond that. The FPV system is RC832 RX with a Anbee clover antenna and a Crazepony FPV micro AIO..40CH 25mw TX. I never really made sure that every thing was RP-SMA or SMA. I thought my booster was RP-SMA then watched you video and checked turns out that it's SMA. Sunhans booster came with an adapter I did not think anything of it I just use it to make sure all the pins plugged in correct. It work great and I have a strong signal. I hope that all made sense:) So do you think that I would be fine using a SMA booster with RP-SMA antennas? Like I said everything plugged in nicely. Thanks again!
Thank you sir for the information.
can this be used in uhf/vhf walkie talkies?
Awesome explanation. Certainly cleared up my confusion. Thanks.
One suggestion where you would use both SMA & RP SMA. Some TX & RX antennas can be different. So you could use SMA on say the TX and RP SMA on the RX.
Just an idea.
The intent behind creating RP-SMA was to comply with specific local regulations. The manufacturers had to make a new non-standard antenna connector for their WiFi devices that was hard to find replacements for (as they were all regular SMA before that), to prevent consumers from connecting antennas with gain and therefore breach compliance (fromWikipedia). So they just simply swapped the locations of the center pin and hole between the male and female connectors, it's nothing to do with the pin being a target for rough treatment in SMA gear
+Colin Ormrod Clear story about SMA and RP-SMA….BUT i still have one question for you: Can i use a Video TX with a RP-SMA antenna and on my goggles receiver an SMA RX with SMA antenna? will those 2 work together or not? or do i need to have RP-SMA on both TX and RX to work together? would be great if you help me out on this question…dumbs up and thanks in advance…greetings from Amsterdam, The Netherlands
So do the rp - rp sma adapter affect signal quality?
Not much.
And i tough the difference was just due to a Brand* reason.
& i made the same mistake, luckily i was park flying.
So now i verify if my flybox is filled properly before flying.
Thank You Professor
thank this helped soooooooooooooooo much!!
Thanks for the explanation -- that was helpful.
One question: What do you do with the nut and washer when you're connecting an RP-SMA? Do you just ignore them if you're not mounting to a bulkhead/panel?
I just ordered a Kia Deng K70C quad, hasn't arrived yet, but doing more research I've found there have been several fly offs, the antenna in the radio and quads is only a short wire, how could I install a 2.4 antenna on the transmitter and the quad and not lose DBS
Another thing that I'm guessing is commonly misunderstood are the numbers attached to motors, particulary when motors are described as "450 series" or "250 series", etc. etc. Is there a reference table that simplifies this practice? Thanks.
+Glenn Doney
I think they are talking about the distance in mm between two motor shafts diagonally across form eachother.
Taranis part 3 please?
thanks the information in this video realy good
could you do a video about Arkbird UHF system setup, please ? there is no video about how to set it up on the youtube. thank you
Helped solo much thanks
Thanks Bruce - another great video. I am trying to set up my FPV base station to be able to fly from within my car given the temperatures in my part of the world at this time of the year. I ordered SMA extension cables, but was sent RP-SMA cables which of course didn't work for my Dragon Link and 1.2Ghz video system. My question is (and I had hoped you would touch on it in this video) "How long of an extension (SMA) can I run for my Dragon Link and 1.2Ghz video receiver, to get the antennas up on the roof of my vehicle from inside the cab?" Does one lose signal strength with the increased resistance of adding too long of an extension? I was hoping to extend about 1.5 meters. Of course, I could set it up and range test, but I thought you would have some insight.
Thanks again for the greatly informative videos!
A 1.5m extension lead shuldn't hurt too much.
Yes, longer cables do introduce some additional loss but at 1.2GHz the loss isn't too great if the right cable is used.
What I want to know is who are the jerks that are giving his videos a thumbs down ?
Thanks!
so the rp-sma has a pin, as I understand you?
I was wondering if there's a bottom to the female part of these connectors.
ie, if I could just use find an appropriate length and width of rigid wire and use it to bridge the gap when joining female SMA to female RP-SMA.
Effectively adding just a pin between the two female components.
If there's no bottom or landing to the female connectors, then that would be no good as your pin would probably go all the way though to one side and not necessarily making a good contact with one of the connectors.
I'm not so much looking to save money here, more space and possibly weight on micro multirotors.
Thanks for the vid, I had discovered the difference some time ago, but hadn't understood it.
I have an amazing mix of TX and RX with both SMA and RP-SMA. From a technical perspective there is no quality difference. Most 2.4 GHz RC TX use RP-SMA and most, but not all, UHF (LRS) systems use SMA. With video TX/RX systems, it depends who makes them. It pays to have an SMA to RP-SMA adapter and an RP-SMA to SMA adapter in the flight box just in case. Not forgetting to make sure that your antenna is the correct one for that frequency!
Wish I had watched this half an hour ago! Oh well now I have some emailing to do to sort out the mess I've made!
cheers mate, helped alot
Very helpful!
Thank god , If I had done this nobody would have seen it Bruce. Another useful 10 min bit of brilliance would be thrust measurement and the subsequent spreadsheet one generates The means and the method. Everyone needs to do their own data matrices
Hi all.. I have a question about a dual antenna mod. What if you use a T shaped RP-SMA connector at modified transmitter and connect two 50 ohm antennas together in parallel? Is it gonna help to increase range? And would if affect badly on the Tx as you're playing with the antenna impedance? Thanks.
Excellent - thanks Bruce :)
Just got a few parcels in of various things, and I did what I usually do and not put everything back into it's correct box. Was faced with "um... which antenna now goes with which little black box?"
Didn't realise (or more to the truth, look closely enough), but the now I've got a heads up on SMA v's RP-SMA, I'll know how to tell which boy bit goes with which girl bit.
Brilliant :D (or should that be 'brullyant'?).
Fanx.
If you've got antennas on different frequencies but they all look like those little black ones -- put some masking tape on the base and write the frequency on them. Without an analyzer -- or without pulling them apart, there's no way to tell what frequency they are designed for otherwise and putting a 5.8GHz antenna on a 2.4GHz system (or v/v) will produce problems -- regardless of whether the connectors are the right type or not.
How to connect a coaxial cabel rg58c/u to a SMA femaleconnector?
amazing they were so smart to make it like that for such an inane reason but came up short to make them look different to we can easily tell which is which. eg, different colour or shape or even different size threads? A small length of solder works well to connect a RS-SMA female to a SMA female connecter. Make it slightly longer so it squashes in nice and tight.
Bruce, actually Boscam uses SMA and Fatshark uses RP-SMA, you confused. Keep up the good videos! Thanks!
Not last time I checked... unless they've changed something recently.
This is what Bryan Cranston could look like in 20 years.
for me im gonna use rg316 with an rp-sma for my wifi extender that has been fckd up and previously using sma but needs to solder on its terminal. i bet i wont have any problem with this. Thanks Mate
Once again. cheers RC!!!
If you want to see lots of versions of these Google >> rp sma vs sma
I bought a few SMA/RP-SMA adapters when they went on sale just for this headache.
Thank you!!
Thanks now i understand
to the vid by 5,00 Why dont you pull one pin out so it fits perfectly and the signal should be sent straight thro the coax without any loss...
thank you
Thanks
Where the pin on this side can screw into LMAO but that was a great explanation keep up the good work though 👍
thx
The real rationale: "let's make the more expensive unit more fragile so they are more likely to buy a replacement."
more informing that flite test
Is it possible to connect a female SMA with a male RP-SMA by inserting a copper wire pin in between the two?
HACK
+Aaron Bash i tried signal lost
sma has a pin at the antenna's and rpsma had a hole at the antenna's. This always make me confused lol
thanks for the explanation regarding of this topic. this really help a lot
...continued
you don't want to replace the chassis part when the exposed pin is damaged. Use SMA, and replace the cable or the cheap antenna instead.
Working at Jaycar, you should see the look on some peoples faces when they ask you for a SMA connector, and you ask whether it's a reverse male, reverse female, or just regular male/female ...
now the antenna screw threads are female and the pin is the female and the radio side is male for threads and male for the pin.. it keeps the sexes completely separate.
I thought the antenna damage excuse was a far too lame of an excuse to justify totally screwing up what WAS a standard, so I looked it up and found this on Wikipedia. Blame the freaking bureaucrats as usual:
"Because they were not readily available, RP-SMA connectors have been widely used by Wi-Fi equipment manufacturers to comply with specific local regulations, such as those from the FCC,[10] which are designed to prevent consumers from connecting antennas which exhibit gain and therefore breach compliance. The FCC considered that the RP-SMA was acceptable in preventing consumers changing the antenna; but by 2000 it regarded them as readily available,[11] though delaying its ruling indefinitely.[12] As of 2013, leading manufacturers are still using RP-SMA connectors on their Wi-Fi equipment.[13]"
Sure now you tell me, I was so exited to get my new 1.3ghz skew planer antennas I didn't notice they were the wrong ones and I couldn't figure out why I had no range. DAAAAA!!!
As an American, it's not "SMI," but SMA! Geez, what a difference an accent that influences the pronunciation makes! 🤣
i fried a dx 7 module because of that reason
A third wave feminist invented RP connectors.
Unfortunately putting the male pin on the appliance and the female pin on the cable means that the expensive equipment is now more likely to get a damaged pin than it was before and the cable (which is cheap and can be reterminated easily) is now needlessly ruggedised. If you are rough with your cables it is because you don't care so no need to change it.
A colleague of mine damaged the RF port on a satellite modem and the modem cost $5,000 to repair in order to keep the warranty. Maybe just keep the appliance female.
I would call them sex changed or Reverse Pin becourse the polarity is not changed.
RP-SMA is stupid stuff - avoid at all costs,. It was introduced to make it difficult for the layman to attack commercially available hi-gain antennae to WiFi routers, voiding the EIRP guidelines. Silly, as if there would be no converters, ever. Anyway, you don't want an RP-SMA on your transmitter or other equipment, because
still confuse as a goat :(
Thanks