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Everything posted by kidphc
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Advice needed... two radios and two antennas to optimize.
kidphc replied to WSEM262's question in Technical Discussion
Alternatively, you could punch a hole in the camper top and install a 20" (will be usable for 2m later on) or so steel plate in the camper interior to act as a ground plane. As long as the radiating portion is clear of the roof rack should have minimum impact on the radiation pattern. I also had the same problem with the 2x4sr on a ditch light/hood mount. It really wants a good solid ground plane. Atleast the fold over will help with clearance on the cab of the roof. It still sticks up about 6" high though. My EMS buddies all chose aluminum camper tops for their personal f150/f250s, to accommodate the porcupine look and offer enough groundplane and separation for all the antennas. Guess you are in the same boat as us. We purposely choose places for meets/dinners that would have us avoiding garages and such. Picture for shits and giggles, of one of my customer's roof whom was assigned an old DC brigade truck while her normal patrol was in for maintenance. She is normally responsible for the interoperability/logistics at the Marine Corp 10k. If you get a chance and can make it past security to see the Lt. at the ops tent, say Cha says hi to her. Picture is really to help those intimating in popping the first hole.. lol Sent from my SM-S901U using Tapatalk -
Advice needed... two radios and two antennas to optimize.
kidphc replied to WSEM262's question in Technical Discussion
I had a similar issue with my trucks. 1.) I dismount my antennas and place a cap (sometimes don't even bother with the cap). When i was placing my truck on the lift. Hell this was in a commercial bay with 22' ceilings even there if I didn't pull the antennas they would be bent or strike the roll up garage doors. 2.) Best antennas, this is very subjective. With trying to be widebanded to cover both services there are a crap ton of compromises. It gets even worse when you look at hood mounts etc. I currently am running a 2/70sh on a hood mount for the FTM400 cap modded. With a Laird B4505cns on the roof connected to a XTL 5000. I had the 2x4sr, it performed well but even on the shoulder it took terrible whacks entering the parking garages. So instead of dealing with the fold-over I went back the Larsen. It has taken a beating the top half of the antenna is bent and the coating is missing all over the place. Even the Laird has a bend in it. Normally now a days I switch to a 1/4 or 5/8th Laird that I modified with a Signal stalk whip for potential garage excursions. Are you trying to maximize simplex or repeater work on both radios? Sent from my SM-S901U using Tapatalk -
It Begins - Time to scan the band - Heard anything?
kidphc replied to Lscott's topic in General Discussion
The infamous low flying animal catcher. Lol Sent from my SM-S901U using Tapatalk -
It Begins - Time to scan the band - Heard anything?
kidphc replied to Lscott's topic in General Discussion
That kinda looks like an older version of the old one. Later version looked similar but had different arrays. New one that I saw, well looks like the newer suburban. With kinda a fiberlass topper glued on to the roof and a crap ton of antennas. Sent from my SM-S901U using Tapatalk -
It Begins - Time to scan the band - Heard anything?
kidphc replied to Lscott's topic in General Discussion
Might be something like roadrunner. A former secret service customer I had mentioned that roadrunner, usually was staffed by former military electronic warfare specialists. Sent from my SM-S901U using Tapatalk -
It Begins - Time to scan the band - Heard anything?
kidphc replied to Lscott's topic in General Discussion
No I haven't. I will ask some of the public safety guys, probably not anytime soon if they know anything about it. For a while I couldn't get GPS, cellular or 2 way radio coms around the David Taylor Naval Research Center. But that was moons ago and there were patriot batteries right by the road. I got laughed at when I mentioned, because it seems a EMF dampeners were active in the area at the time. I just didn't know, but my friend were aware, 100+ feet down the road and everything was normal. But I know where roadrunner gets fixed fairly often. Would be suprised if it wasn't active during an inauguration. Sent from my SM-S901U using Tapatalk -
It Begins - Time to scan the band - Heard anything?
kidphc replied to Lscott's topic in General Discussion
Been working with HIPPA since the requirements came in. I was working at a fortune 5 software company. Our division dealt with document management. The amount of NDA with various organizations I signed is staggering. I wish I could say the same here as far as HIPPA compliance and transmissions. Listen long enough to the conversations, and name, address, age, vital stats, previous medical conditions come across. Especially, on FD/EMS dispatched calls. That type of traffic irregardless of purpose should be encrypted, IMO. Sent from my SM-S901U using Tapatalk -
It Begins - Time to scan the band - Heard anything?
kidphc replied to Lscott's topic in General Discussion
I have heard of them discussing here. Having dispatch outbound un-encrypted and the rest encrypted. Personally, I am in favor of encryption. There is just traffic that the average people do not need access to. It could save the life of a first responder, HIPPA compliance etc. Sent from my SM-S901U using Tapatalk -
It Begins - Time to scan the band - Heard anything?
kidphc replied to Lscott's topic in General Discussion
To the original question you posted. During the rush in the Capital. I could see the increased activity through the Simulcast repeaters on the SDR. But the data meant crap, obviously I don't have the keys, so it like trying to listen Charlie Browns teacher and decipher it. MoCo had switched to some encrypted TAC inoperability channels, to assist. Since the rioters were using HTs, no buneo on traffic from where I am. I am better off turning on the t.v. and watching for smoke over the horizon. I wish sometimes...lol most i get on gmrs is from friends whom use to know my commute. They would inform me of avoid areas due to accidents and such. -
It Begins - Time to scan the band - Heard anything?
kidphc replied to Lscott's topic in General Discussion
I would say for those purposes you would be better off buying a dedicated scanner. Still won't help you with encrypted traffic. Which you already know. They were purpose-built for scanning. They can fly through the memory bank so much FASTER. Really disappointed at how slow some of my Yaesu gear is. Which is still 1000% than a Baofeng. Here outside of D.C. almost makes no sense to waste radio gear on scanning. In D.C. the Office of Unified Communications has everything encrypted, you can't hear them talking about the explosion in a porta potty.. Only PG County police and Moco aren't encrypted yet. Although both have been talking about flipping the switch. -
Radioddity DB20-G for Vehicle&Home Use?
kidphc replied to WSFJ540's question in Technical Discussion
Yes, that is what my setup in the house with the blade antenna. I chose a pryamid power supply with a cigarette lighter outlet built in. So I could unplug it and drop the radio in the wife's van. She didn't want a radio so ease of removal was a high priority. Everything else I own uses power pole connectors. Sent from my SM-S901U using Tapatalk -
Socal is correct everything in everything he is saying. Antennas will be much better when outside, when properly tuned for your service, have a proper ground plane (counterpoise), with the lowest loss coax for that frequency and high as you can get it. Then they will perform up 1000% better than the same setup on the ground. VHF/UHF are line of sight for the most part. Get them up high, limit their obstructions and they start performing well. I had a buddy on a roof top (15 stories up) some 20 miles away he was able to hit me on simplex with 5w. We could do 15 miles of simplex with his base. But his antenna was over 100 feet up using air core hardline. RiP WRPJ758, 73. The old fart understood the basics. When it comes down to it pretty much all antennas are a compromise to begin with. Make them smaller, shove them inside of house, put it on a ht, use a hi-gain antenna, etc and you are adding compromises on top of compromises. Any reason you are trying to use indoor antennas? Just about everyone will recommend against it right away. Almost all my gmrs/ham gear is in the basement. This blade antenna I built was for my wife to use on rare occasions. Really was onl built to cover the neighborhood to get in touch with the kid. We used it all night for Halloween. For grounding, if everything is indoors than no you will not need grounding. If anything exits the house I recommend grounding. Even if is just the co-ax. You can get static buildup just from dust blowing over it in the wind. Sent from my SM-S901U using Tapatalk
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I use external antennas mainly when I can for hf. For the ham uhf/vhf stuff it's in the attic. Fortunately, I have almost 10 feet in height to work with. So up went a 8ft long fiberglass vertical. All this because of the HOA. More inline to answer your question, I made an indoor blade antenna. I took a N9Tax slim jim tuned for gmrs, only because I got lazy. I ran inside some plastic wiring track up to the 2nd floor in a vaulted area of my house. Marginal success with both the wife and ht. It started to shine when I hooked up a db-20g/at-779uv to it. The range from the ht went from 600ft to closer 1500-1700 ft on simplex at 20w. Keep in mind a moderately Heavily wooded suburban area. It was enough for my wife to be able call me at a local Plaza while I was about 30ft inside a Walgreen, when I was on a ht. As far as repeater work it was almost as good as being outside with the ht. But really that is how good the local gmrs repeaters around here are. Sent from my SM-S901U using Tapatalk
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Right here thanks to WRUU653. Post #34 Sent from my SM-S901U using Tapatalk
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MARC, has a video of a presentation he did to an offroad group. Which might answer several basic questions for you. It is somewhere on this site. Sent from my SM-S901U using Tapatalk
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UHF and propogation conditions - weird experience last night.
kidphc replied to SvenMarbles's question in Technical Discussion
But in the middle of the night? It occurs due to temperature inversion. Maybe it was ducting caused by an incomming storm, maybe? Sent from my SM-S901U using Tapatalk -
Seen that one. I think it works great, especially if you don't want something like a havis console. Sent from my SM-S901U using Tapatalk
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I have buddies that get nuts and yes they will try to route lmr400 or 600. Worth it? I don't think so they are much thicker and stiffer. Bend radius is like 1 ft, make it tighter and you damage the insulator and will have terrible performance. Ever notice how losses are measured in 100 ft? 4-12 ft is hardly worth it going to thicker lower loss coax, personally. On a 100-300ft run yes it's worth the cost for aircore or lmr600. Sent from my SM-S901U using Tapatalk
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One channel, multiple parties with tones
kidphc replied to WRXR374's question in Technical Discussion
Whom ever has the stronger signal wins. Hence the stomping comment, sorry this is how fm/digital fm work. The other transmissions will be lost. This is irregardless of tones. You put tones in people just wonder why transmissions aren't getting through or seriously broken up at times. If you are sharing a frequency between parties you will want a business license or amateur radio license and utilize dmr/moto turbo. This was designed to reduce collisions via color codes and time slots. Sent from my SM-S901U using Tapatalk -
Most use larsens or motorola nmo. A lot of times they have better solder joints and materials, and cable. Not huge differences than Chinese nmos, but why bother for what $8.00 difference. With lip mounts depending how often you open and close the opening. You still deal with the negatives of routing the cable through openings like a mag mount. Negative to most nmos are they weren't designed to be exposed on the bottom thus possible water intrusion is a factor. They were really designed to be used in drilled through panel installations. Done properly and avoid serious whack they rarely leak. Sent from my SM-S901U using Tapatalk
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One channel, multiple parties with tones
kidphc replied to WRXR374's question in Technical Discussion
Wouldn't recommend. With tones you don't get more bandwidth. All the parties will stomp on each other during transmission without knowing. Once carrier is being used, irregardless of tone the frequency is being used. Tones just ignore the transmissions and doesn't break squelch unless the tone matches. Sent from my SM-S901U using Tapatalk -
Two repeaters on the same frequency and tones, 20 miles apart. What to do?
kidphc replied to Suburbazine's question in Technical Discussion
We have multiple repeaters in this area that are on different tones. The repeater owners do a good job self coordinating, there are problems sometimes. For the local area users, this sounds great. Till they learn they have to change their behaviors. You can either run no pl on receive, you get to hear all the landscapers and kids on simplex. Me I just run "monitor" for a more than a few moments before transmit. To make sure the carrier signal is not occupied by the other repeater. Why? Doesn't matter what the pl is if the carrier is taken. You will get collisions If both repeaters transmit at the same time. There is a benefit now though. Cross repeater talk. Both parties on both repeaters use no pl or monitor. One party transmits, second party waits till both repeater tails drop then they the second person transmits. Woot, you effectively have linked repeaters legally, and now have one huge repeater where the coverage effectively overlaps. Sent from my SM-S901U using Tapatalk -
What new information do you speak of? Sent from my SM-S901U using Tapatalk
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Cool. Played with my friends icom 7300, from a user stand point it was a more pleasure experience then the ftdx. He sold both and got a ts590, set it up with a sdr and panadapter. Funny enough I think he is crazy happy with the setup. Loves ft8, 5w to europe, 10w to Australia. That is with a 46" ultimax dx snaking through his kitchen and living room that i gave him as a bday gift. Gotta keep reminding it's a random wire and incredibly inefficient. Sent from my SM-S901U using Tapatalk
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If you aren't using some type of cat control, which i recommend for the yaesu hf radios, especially since a computer is probably already hooked up to the radio. I recommend cat knobs. The one I have for the ft991a is discontinued (I believe) he's switched over to a touch screen interface. Either way it had 4 programmable knobs, that sit above or below the radio and is daisey chain able. It was a game changer I am only a technician, but listening on hf was a real pain with everyone running different bandwidths on ssb stc. It allowed me to program one rotary dial to something like bandwidth size, freed up a programmable on screen button, btw that you yaseu but why can't I add more that 4n ever heard of scrolling menus or swipe arrows. Either case it let me have quick access to thing I would be adjusting just so I could listen clearly. Instead of the dread 3 button menu clicking. Sdrconsole and omni rig took care of a lot of other complaints. Link to cat knobs to give you an idea. https://www.catknobz.com/ Miss the old radios because of the simple lack of knobs on new radios. Sent from my SM-S901U using Tapatalk