BoxCar
-
Posts
1425 -
Joined
-
Last visited
-
Days Won
31
Content Type
Profiles
Forums
Events
Gallery
Classifieds
Posts posted by BoxCar
-
-
One additional kit is Anytone GJ-0854. The PS and mount hold a radio that's 1 1/2" high (40mm) and a 5/8" wide (119mm) from here: Base station power supply
-
Well, I'm not close but there are several things you can do to check the repeater output yourself. The first thing is to check the power to the antenna with a power meter and dummy load. You need to put the power meter and dummy load at both the repeater output port and, at the end of the coax feeding your antenna to compare. The second is to inspect the antenna and verify its suitability for the channel. This is best accomplished with a nano VNA as UHF antenna analyzers are expensive. Thirdly, how is the antenna mounted? What's the HAAT? That's Height Above Average Terrain. For UHF average terrain will include buildings and trees as well as hills as they all affect the radiation patterns and distance. Once you have done those checks you'll be ready for some "drive tests" to determine both handheld and mobile coverage areas.
-
-
LMR will be for the entire business frequency pool.
-
15 hours ago, SteveShannon said:
Repeaters are required to transmit the call sign at the end of a conversation and every 15 minutes while in use. Most don’t transmit their call every 15 minutes when not in use because that would be annoying to anyone who monitors the repeater.
So, after a repeater has been on standby for awhile and someone tries it or kerchunks it, many repeaters will issue their call sign.Nit pick time - a private repeater that carries only traffic from the owner is not required to ID as long as the owner does.
-
Other than one not needing any metal to act as a ground plane, no.
-
Welcome to the group and as a note, there are literally hundreds of YouTube videos on getting started with GMRS -- and no, you don't need a repeater!
- SteveShannon and dosw
-
2
-
The Retevis CPS will display the default tones shipped on the radio. I don't remember how you disable the tone or if it was even possible on those radios.
-
-
Scadacore will let you model the RF path between your two sites by showing the terrain and earth curvature you need to factor in for antenna height. As far as equipment, the three most important things are: 1) Antenna; 2) Height above ground (AGL) at both sites; 3) radio. If you don't have a clear path, no antenna or radio will work at GMRS frequencies as the signal travels about 15% further than the horizon. Power just means there is more signal in the area, not more distance. The 20 mile distance you estimate would be adequately served with a 25W radio in most instances. Personally, I would choose an Anytone radio over the two you mention as their price/performance is on a par with much more expensive units from other Chinese manufactures.
-
2 hours ago, WSAQ296 said:
Well, unlocked what bandwidth options does it give? 12.5 is always narrow, but 25khz is wide in commercial and ham, 20khz in GMRS. splitting hairs I know, but still. I guess the minute it's unlocked it's not legal on gmrs, so if it's out of bandwidth compliance who'll really know/care?
Wide band means the channel is 25kHz wide, but the intelligence (speech) occupies 20 kHz of the 25 available.
-
FM CB is still new and most of the radios in service don't have the FM capability. I imagine FM will become used more as users either upgrade or replace existing radios.
-
Good luck on finding one with a Type C - you won't. The best option is for an adapter from the battery to the radio's Tee connector.
This will connect to a LiFePO4 15AH battery and the radio. Should be good for a couple days use without heavy sending.
-
-
The FCC may levy the fine, but the money goes to the Treasury department as part of the General Fund. The only parties that quickly pay are those with licenses the FCC grants as they can cancel or deny further application or renewal.
- SteveShannon and TrikeRadio
-
2
-
comma, comma, comma
-
Congratulations on the new license. Yes, General is a fairly easy upgrade but be careful as the toys are expensive.
- SteveShannon, WRUU653 and hxpx
-
3
-
Have you tried contacting ICOM? Their phone support is very good.
- SteveShannon and WRUU653
-
2
-
3 hours ago, WRTC928 said:
I'm curious about why you want to do this.
On 5/22/2025 at 1:25 PM, WRPL657 said:Can two repeaters with same input and output frequencies but with different transmit and receive tones for each repeater work without creating a feedback loop or some other problem? Our situation is we have two repeaters, one is in operation now. It does not cover a critical location in a mountainous area. We have a second repeater set-up that is identical in frequency and tones. If the second repeater's tones were changed to be different from the first repeater could they operate in close proximity (10 miles) with out creating a problem? Anyone out there with similar experience?
That's why.
-
-
I'd contact Maxon for guidance as the connection between the units may not be standard in their standalone units. "
-
3 hours ago, marcspaz said:
If the tones are the same, both repeaters would come up and 'repeat' your transmission at the same time. No loop could be created.
You will still get some interference from the other repeater in overlap areas due to the phasing of the signals. Overall, it will work with the same frequency/tones.
-
-
48 minutes ago, AdmiralCochrane said:
As I understand it, that is to the physical visible horizon, but RF propagation usually follows the curvature of the Earth some fraction beyond the visible horizon.
37 minutes ago, SteveShannon said:That’s correct. For UHF it’s several percent further than the visual horizon.
About 15% at most. Figure close to 10% but it's all dependent on terrain and weather.
Is GMRS what i need
in Guest Forum
Posted
Your entry level ham license is very easy to obtain. About 8 to 12 hours of Q&A memorization or viewing Youtube videos and taking a 35 question test to show you understand the basics is all that's required. You can find a local ham group to help you study and do the test from the aarl.net website.
Good luck, and get legal on using the full abilities of your radio.