Best home built SHTF Repeater? SR-328 and SR-628 (Part 2)
ฝัง
- เผยแพร่เมื่อ 8 ก.ย. 2024
- This is a comparison and proof of concept of home built amateur radio repeater system.
Part 1 - crossover cable
Part 2 - Surecom SR-328 - Duplex Repeater Controller
Part 3 - Surecom SR-628 - Cross Channel Repeater Controller
Part 4- Surecom SR-112 - Radio Record Simplex Repeater Controller
Part 5 - Retevis RT97 - Portable Repeater System
Hi i whant to no the radio are they on the same channel
Not sure why you a blaming the controller for your lack of provisioning suitable separation, duplexer cavities, antenna & adequate transmit power (to meet your expectations of cover a LOT more distance).
How far extra are you expecting it to transmit beyond the normal HT range when they are both co located ?
Perhaps looking at the purity of the audio in & out of the controller (compared to each other) and any TXD also be of value. This is important for any data related transmissions
I think your summary is biased based on flawed testing (and apparently expectations without supporting technical data).
Good to know that its not reliant on VOX
😂 yup. Coax the antennas far apart, or 2m to 70cm different bands still need some separation of antennas but not as much and or a duplexer which kills your power. Radios need some separation even with coax. Side by side is no good since they will bleed so don’t put them into a plastic case like what you see on some videos. Coaxed antennas at least 12ft apart min. The more the better! Repeater from 2m to 70cm works better because they arnt fighting each other for RF. They still will interfere but nothing like on the same band.
On an analog repeater, I turn roger beeps off. They have a squelch tail, you don't need it. DMR is different.
Would this work to relay a garage opener’s signal
I am just looking at this trying to find out more about the surecom products. My hunch is that it is not really the surecom causing the grief but the close proximity desensing the front ends on the cheaper "Fangs". How was the SWR on those magmounts when you checked it? reflected RF back down the radios and maybe into the receive radio could really cut down the range. Did you put them on a metal ground plane? Again my thought is there was RF contamination back into the receive... probably. I am just spitt-balling getting ready to do some similar experiments.
I am setting up a bigger repeater with a duplexer but I want to try what you are doing for a SHTF in a toolbox style repeater with the two antennas. Just to save $$$ I will probably just do the Cross-Cable and Vox method to start and then if it look promising I might get an actual controller. Oh an though I am a Licensed Extra class Ham I will be doing these on GMRS with Type accepted Baufengs or Retevis radios. That way I don't have to jack around with frequency coordinators and my whole fam can use them next time they shut down cell coms.
You It may take two cheap @$$ harbor freight tool boxes separated and a longer audio cable extension looped through ferrites but there is no reason this idea should not work
Making sure i understand this because im new to all of this. Either of these will work with one radio or simplex orbduplexbmode if i understand that right? Ive had a cheap radio for awhile and managed to get and listen in on ham,murs,frs,gmrs. I wanna upgrade radios but in my research i realized i have no gmrs repeaters in my area. So here i am trying to figure out shtf repeaters until they catch up to speed. I dont wanna go through the work of a ham liscence at the time so id like to just do the gmrs liscence. Sorry for the newbie question.
Maybe build your own GMRS repeater. Check out NotARubicon on TH-cam. He has a lot or really good videos on GMRS systems and different radios. Also you can check out the RETEVIS R97 repeater. It’s pretty good starter system.
Check out Part 3 th-cam.com/video/QK8suRLCwE4/w-d-xo.html. It explains. I highly don't recommend buying any Surecom "repeaters"