WRYZ926
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Posts posted by WRYZ926
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14 minutes ago, Davichko5650 said:
of course we yelled at the SH's that tried to tell us the freq. was in use, as well as portions of the VHF TV audio freqs. within one mile of our location as we practiced using ECM (jamming) platforms.
The Germans would not let us use the new (at that time) SICGARS radios in 1994. We were interfering with their civilian communications, televisions and broadcast radio.
We would occasionally mess with the local TV station in Rolla, MO when I was stationed at Fort Leonardwood. We would have fun with civilians that complained about us on the frequencies when I was at NTC/Ft Irwin. We would purposely jam the whiners.
On topic, @OffRoaderX it will be interesting what you find is causing the interference.
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Good luck getting the FCC to do anything about the military's use of the bands. The military has priority no matter what.
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It is possible that military radar is causing the interference. Or it could be government data transmission bursts.
I do know that 70cm repeaters are restricted in certain parts of the country close to air bases because of their radar systems.
I usually see large government data transmissions on the 17m band every weekday evening around 5 - 7 PM central time.
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Is this something that happens all of the time or did it just start since Friday?
The solar storms have definitely been causing issues with all of the bands and GMRS since Friday night.
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1 hour ago, WSAM454 said:
Your Comet antenna is advertised as wide-banded, to cover GMRS and Ham frequencies, so somewhere, on some frequency, it may have a lower SWR, but as has been said, 1.6 is certainly not a problem.
Anything under 2.0 is fine.
Even with a SWR of 1.8 on 467.600, I still get great signal reports with the Comet 2x4SR hooked to my Wouxun KG-XS20G radio. The repeater is 21.5 miles away from my house.
The SWR is 1.2 at 462.600 and 1.5 or less on the 2m and 70cm bands when using my 20 watt TYT TH-8600. Both radios and antenna are on my SxS.
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I wouldn't worry about 1.65 SWR. I run a Comet 2x4SR and the SWR on 462 MHz is 1.2 and 1.7 on 467 MHz. The SWR is also very good for 2m and 70cm.
Are you going to use the radio and antenna for 2m and 70cm?
If so, then check the SWR for 2m and 70cm before making any changes to the antenna.
Also you need to know where the antenna is most resonant before making any changes. This will require using an antenna analyzer.
- SteveShannon and WRUU653
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EMF will affect HF for sure and can affect VHF depending on how strong the electromagnetic field is and distance from the source.
I am surrounded on three sides by utility lines in town with two transformers (one south and one north of my property. And the neighbor's above ground service connection is on the fourth side. I haven't noticed any interference on HF, VHF or UHF.
- DSHIDS and SteveShannon
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As mentioned, you should be far enough away from the power lines.
While high voltage power lines do put out an electromagnetic field, you have to be pretty close before they will cause interference. And they will not affect UHF/GMRS like they affect the HF frequencies.
Funny story.
I operated a truck mounted machine shop powered by a 25KW PTO driven generator. The generator was not electromangetically suppressed and would jam all comm equipment within 100-150 feet of the truck.
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Glad to hear everything is working out for you. And if you keep your repeater setup private/family use only, then you shouldn't have to worry about duty cycle or the radios getting too hot.
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@Sshannon we have mentioned that to them. The FRS base station was just talk since the grandson loves radios so much. Grampa is also our club's head VE so I don't see him breaking the rules.
Again, gutting a legal FRS radio and putting the guts into a 3D printed body with the antenna permanently attached was just talk. I'm sure Grampa will get the boy licensed as an amateur in the near future.
- WRUU653 and SteveShannon
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20m has been in and out all day on SSB and FT8. I did find two guys rag chewing on 17m earlier this afternoon. Other than the one signal on 17m, all of the higher bands have been dead on SSB and FT8.
I sat there and listened to the two guys on 17m, one had a good strong signal while the other was pretty weak. That did allow me to fine tune things on my Xiegu G90 though.
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13 minutes ago, WRXP381 said:
Just have grandpa get a gmrs license then grand son can use it. Buy any base station you want and use it. No need for all the junk building and FRS radio that is so limited in power. Heck you could even do an unlocked ham and only put in 1 frequency
Grampa doesn't want to get a GMRS license. And yes we have been trying to talk him into getting his GMRS license. This whole project will probably go nowhere anyway.
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12 minutes ago, WRYS709 said:
Except for the fact that FRS is a system where the license is provided by rule. If you make a DIY FRS radio, no matter what wattage you set it for it becomes unlicensed and all users are violating Part 95E.
Maybe you don't care, in which case, what we answer is irrelevant.
If you want FRS, but FRS. If you use GMRS, get a license.
And that is why this project hasn't gone beyond talking about it. Yes all involved are aware of the regulations. And this is why it was discussed using a legal FRS radio inside a 3D printed case to make it look like a mobile/base station.
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17 minutes ago, WRQC527 said:
There's always this if you want to go the expedient route for about a hundred bucks.
Yes that is an option as is using a regular GMRS mobile programed with CHIRP to keep it set on low power, etc. No one in that family has a GMRS license and they are not interested in getting one. Grampa has been licensed for amateur radio since the 60's and will get his grandson licensed when he gets a little older. I will pass on the information though.
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One of our club members has been considering how to make a FRS base station for his grandson. We talked about taking the guts of a FRS radio and installing everything in a 3D printed body to keep the antenna permanently attached. His grandson is about 7 years old and loves talking on the radio with his grandpa.
As far as assembling an AR. I use nothing but simple hand tool for the lower while sitting at my desk or on the couch. I only use a vice and torque wrench for attaching the barrel and muzzle device on the upper. Otherwise I hand assemble the rest of the upper at my desk too.
@Davichko5650 your post made me smile remembering all the gags we would pull on each other when I was in the Army.
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I was on 20M FT8 when the aurora popped up over mid Missouri earlier. I could tell when I started getting a lot of noise show up on my WSJT-X waterfall. I stepped outside and got some good photos of the aurora. I haven't noticed much effect on 2m, 70cm, or GMRS tonight. But the HF bands were definitely affected.
I did make a few contacts on 6m this evening. Everyones voices sounded digitized and weird.
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I have to agree with @WRWE456, more information is needed so we can make recommendations. If you have eight restrictions, then something like the Nagoya UT-72G or Tram 1174 will work well. The Nagoya is 19" long and the Tram is even shorter. The Comet 2x4SR is an excellent antenna if you don't have to worry about height restrictions, it is around 38" long.
As mentioned, the center of the cab roof is the best spot. A lip mount on the hood or mounting on the top of the bed rails will work but not ideal or as good as the cab. I agree that going with a NMO mount is best. Go with a magnet mount if you don't want to drill any holes. The Midland and Melowave magnet mounts are pretty nice at reasonable prices.
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@kidphc I agree having a turn key option is a good idea. B-Tech needs to work on their duplexer setup first. They could offer a duplexer setup for a single repeater channel for now and let customers choose which channel when ordering. That would give them time to perfect the current multi channel duplexer.
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I wonder if B-Tech is trying to do too much with the built in duplexer by having it work on all the repeater channels. After talking to people more knowledgeable on the subject, they sure think so.
Duplexers that are small enough to fit into a repeater will not work as well as separate external duplexers. And that is why we went with a separate duplexer when we set up our Bridgecom GMRS repeater.
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2 hours ago, WRWH978 said:
Pretty disappointed after watching the review. (thx) Wonder if there will be a V2 in a year or so? I'll stay with my retevis RT97 repeater in the meantime.
The Retevis and Midland repeaters are good for covering a smaller area or for limited use. I would personally stick with a Bridgecom repeater or a used Motorola repeater programmed for GMRS if you want something more powerful that the Retevis/Midland repeaters.
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telewave ant450d Folded Dipole for repeaters?
in Equipment Reviews
Posted
Folded dipole antennas work well and are very common for repeater use. We are using them for our 2m, 70cm, and GMRS repeaters. All are mounted on a local radio station's 900 foot backup tower.