tweiss3

You do need the RF adapter assembly: It does look like the rest of the alignment/testing can be done with the standard programming cable though.

I have to say this brings up another point. When running high power at 200W, who cares about the loss of a meter inline, especially on VHF. It is a very different scenario running barefoot on UHF with an already pretty long feed line.

YSF does this, atleast on the FT3DR and FTM-400XDR, but only with YSF.

I just sent you a message. Kenwood TK-3140's can be had for the same price as the GM-30, and in my opinion works much better. You loose front panel programming, but lets be honest, with some good thinking, and the ability to program up to 250 channels, its not an issue by any means.

I was without "my" truck yesterday, so I had the 7550e sitting in the cup holder, and could hear just as well over the hill on the XPR as I do on my mobile rig. My office is just on the other side of the ridge, but it's 200+' in elevation difference (1050ish to 1270ish). I normally don't pay attention because there usually isn't a conversation going on when I get out, but I could hear it all the way up the hill.

I will say, I think the "behind the keypad" speaker and microphone is a negative as well.

I see a few additions, most of which I saw on RR's thread: 1) Better wifi 2) 0.8W more power 3) as noted, bigger screen 4) new battery, but can use old chargers if you update the charger firmware

To be clear the NX-300 Type 2 400-470 (ALH378501) does not but they Type 2 450-520 (ALH378500) does.

Beyond system stress testing, and for something to do, it also helps improve each user's listening skills, practice for proper protocol to pass traffic, and in some cases, help one understand the system coverage/dead spots when mobile. Practice makes perfect.

Well, I installed the commercial antenna I had just above the roof line because the wife said I needed to clean up my office, and 1-1/4" feedline and parts were all over the place. I have a few months to maybe find a better antenna deal, but for now, I'd say that X300NA is not good for GMRS. If I could find two folded dipole arrays, I'd combine them onto a single mast, or even if I could find a DB-315 (no longer in production, super hard to find). Not looking to spend huge money, as I'm still going to be limited on height.

It makes a boom like firecrackers (and shook windows).

I've replaced a few well working older computers with recycled workstations, more power and better efficiency on the electric bill. We use some high-pressure wireless hole punches ? on our hard drives, sometimes we also used some "make it disappear powder".

This was a test setup just to measure where it landed in GMRS, knowing it was a ham antenna. I think you have some serious masking in your feedline, because my measurements aligned directly with the claimed SWR for the ham band. My hope was that outside of the band, it wasn't too steep and would work, but it is a bit too far out of band.

The Laird is a commercial antenna designed for that frequency range, with the golden metal tip and golden base. It came with the repeater.

Intent is to put up a repeater on 22 462/7.725 I'd like to setup a winlink gateway on VHF, but if needed I can figure that out later. This antenna is loved away from my other antennas, and is for services only, not normal use (Winlink, iGate & Repeater). My only must right now is the repeater.

I had originally planed to use an X300NA antenna to put up a repeater AND packet services for VHF ham. Today, I finally got around to unboxing the X300 and assembled. I clamped it to a tripod mount 5' above the ground in the middle of my driveway to check how it swept with the VNA. I also have an antenna that came with the repeater, that I think is a Laird Technologies FG4603 based on the size, color and shape. The specs between the two are below: X300 - 10' tall, 9.0db gain on UHF, 5/8 wave five element SWR: 462.68MHz - 2.525:1, 467.62MHz - 3.125:1, 449.67MHz - 1.461:1, 438.36MHz - 1.237:1 Laird - 3.66' tall, 5.0db gain SWR: 462.68MHz - 1.730:1, 462.30MHz - 1.698:1, 467.62MHz - 2.150:1 With the above, I have 22.8W leaving the duplexer, and with the mixture of fittings and coaxial, my coax loss is 0.559db. Using an SWR power forward calculator, and a EIRP power calculator I calculated the following: X300: 19.1 W forward power gives 53.40dB EIRP Laird: 21.28 W forward power gives 47.87dB EIRP Leaving everything the same, mounting height, coax, everything, and knowing here is a 6.34' top of antenna height advantage and 5.53dB EIRP advantage for the X300 with higher SWR over the other antenna, which one would you choose and why?

I signed up for the announcement that comes out in 10 days. Thanks @gman1971

I do have a go-kit radio that I use for hiking and doing parks on the air (6M,2M & 440 while in motion), but I also have EFHW in the bag, one for 40/20 only, and one that will do 10-80. For NVIS (which will get you closer contacts) anywhere around 10' above ground will work, but should be less than 30' in the air. That being said, I have worked Utah, Spain & England on 5W with a vertical on the car roof. The Elecraft are nice, but they are a bit pricy for a bag radio. I know quite a few guys that use them, but they are real points guys doing QPR on CW only. Depending on how you are planning on using it outside of emmcom, The 705 or FT818 will both be great. Both come with their own internal batteries, and can work with an external battery or power source. 705 will go up to 10W on external power, 818 only has 6W. 705 will require you get your own antenna for even 2m use, where the 818 can be used out of the box on 6m/2m/70cm with the included antenna. I have an 817 with a handful of accessories, and for what I paid for it as a used package, I have zero complaints, but if I were to buy another low power HF radio, it would be the 705. I still recommend it is a wonderful radio.

Well, it will do two good things. 1) There may be many more 7550e's on the used market soon 2) Maybe they improved things, like the antenna connector, or added mobile docking for the portables like the APX, I'd dump my current car radio in a second.

As does the XPR series radios for DMR. It's also why the Kenwood NX radios can support all 3 with just key changes.

Correct, P25P2 requires trunking/data channel to synchronize, so simplex flips back to P1 at 12.5kHz. The NXDN sound darn good on VHF, especially since my district has the lowest density due to being interwoven in the national parks system, our footprint is huge. I did find another school system that is low power, 4 site, 5 frequency DMR, but uses only 2 talkgroups (busses and facility/maintenance). They sounded good too, but their footprint is tiny and odd shaped (hence the number of sites. The real problem is there isn't any good current commercial equipment that the FCC has given Part 95 approval for. I'd love to see a current lineup get the stamp. Sooner or later, the EOL stuff is going to be boat anchors.

Yea, my VHF radio at home doesn't like my 1W APRS beacon that is 28' away from the base station antenna (144.39MHz to 147.27MHz). Though, looking at the sites for some local P25 P2 systems, they have frequencies as close as 0.275MHz, however, appropriate TX combiners and filters/cavities it wouldn't be an issue at all. I read somewhere that P25P2 was supposed to be FDMA (true 6.25 individual channels), but ended up TDMA, which is still ok since it is a 6.25 equivalent. I believe NXDN is the only true FDMA 6.25 mode available, and works well for the railroads, but it's not common on the public safety side (my school district uses it on VHF for the busses). As far as TETRA having 4 paths on one frequency, it does, but it is also TDMA in a 25k frequency, so basically 2 DMR stacked next to each other in 1 frequency. Long and short of it, I don't think DMR as we know it is going away. If they stopped acknowledging it as a 6.25 equivalent, then they would have to shut down P25 as well, and that won't happen.

This. I used a hammer the first time, was too much effort. Looking to drive another one soon, so I bought a hammer drill (keep saying I need one for various projects), I'm not doing one by hand again.

Good deal. Enjoy it, thanks for the pictures.

I would suggest you contact Oklahoma State Department of Homeland Security, which is who those interop frequencies are licensed to. It should also be noted, you likely won't get anyone on those frequencies. Looking at the license, the emissions designator is for P25, and considering the state has gone to P25 for OMACS there is likely not a single soul that will be listening to analog NFM to even pick up your call for help.