Posted: 11/19/2008 3:38:03 PM EDT
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So a buddy of mine and I are re-thinking our comms set up. atm, we listen (no licenses yet to transmit) on a handful of vhf freqs.
We live roughly 5 miles apart. i live in a lower laying area, and even my cell phone gets shitty coverage inside my house. so what we're looking for is something that will cover the 5-10 miles spectrum and closer (line of sight). also we'd be interested in knowing what freqs are usually used by anyone. ie: if we wanted to communicate privately, what range would be the best to do it on? also if you have any radio suggestions we're open. atm i have a vx-150 |
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So a buddy of mine and I are re-thinking our comms set up. atm, we listen (no licenses yet to transmit) on a handful of vhf freqs. http://www.ar15.com/forums/topic.html?b=10&f=22&t=614087 ar-jedi |
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if i'm txing on 144.45 it won't bleed over into 144.50 will it? eta: and if we're txing on 144.45 and the local repeater is programed for 144.39 it won't hit the repeater right? it'll stay in our radio range? .45 and .50 you would be too close to try to use them at the same time. 144.390 is the APRS frequency and is for packet radio only and brief voice-alert uses and is not used for repeaters. Repeaters use a TONE to key up the repeater, they also transmit/receive on a separate frequencies. A Simplex repeater uses the same freq. It really depends on your area . |
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i guess what i'm asking is: at short range what's the best way to keep our conversation private? Low power. Find a good simplex frequency on 1.25 meters (222 MHz), 70cm (440 MHz), or 6 meters (50 MHz). There are a lot of portions of the ham bands to "hide" that most people won't be scanning or looking for activity in. Six meters is a good one between 51.5 and 51.6 See here for simplex frequencies. http://www.ac6v.com/callfreq.htm While no frequency or mode in ham radio will guarantee a private conversation, you can take the steps to make your presence not so obvious. Low power, not often used part of the spectrum, not common mode (AM not used much. SSB will eliminate anyone with a scanner from listening) etc. |
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i guess what i'm asking is: at short range what's the best way to keep our conversation private? luckily, i saved the answer from the last time you asked this question: http://www.ar15.com/forums/topic.html?b=10&f=22&t=604477&page=2#10323386 ar-jedi |
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i guess what i'm asking is: at short range what's the best way to keep our conversation private? luckily, i saved the answer from the last time you asked this question: http://www.ar15.com/forums/topic.html?b=10&f=22&t=604477&page=2#10323386 ar-jedi probably i've never seen that link before but a HUGE thanks. |
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probably i've never seen that link before but a HUGE thanks. here is the original http://archive.ar15.com/forums/topic.html?b=10&f=22&t=613166 ar-jedi |
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Packet is a good way to have a link between you and your buddy. You can connect with him permanently and send text msgs. to him like instant messenger and it is somewhat secure. A "packet box" (as we used to call them in the olden days) is almost unknown these days and traditional packet is all but dead. I used to link with a buddy also and it was great, we would send each other little blurbs like "EA8 on 28.325 -5 split" when we were chasing DX back in the early 90's. The cool thing about this is you could leave the room, go have dinner and when you come back there was the message.
We used 220 mhz band for our link because no-one else was on 220. Packet is somewhat secure because you need some form of decoder to read it, and it transmits in very short bursts which are often missed by a scanner. |
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one of these days i'm going to get down to the red cross for the local ham meeting.
now i'm wondering about using a vehicle mounted 2m as a repeater for our selected channel(s), but am curious as to how that works. I think, with the low power that we would be running, and the channel availability on 2m, we're going to be fine for our purposes, though i'm going to have to use an antenna to get out of the <ditch> in which my house is located. |
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now i'm wondering about using a vehicle mounted 2m as a repeater for our selected channel(s), but am curious as to how that works. first see http://www.ar15.com/forums/topic.html?b=10&f=22&t=604477#10323265 then see http://www.ar15.com/forums/topic.html?b=10&f=22&t=604477#10323267 ar-jedi |