Technically, using any of them on any of the non-FRS channels requires a GMRS license per user, even at the 1 w level, unless there's been some drastic change to the GMRS/FRS rules I don't know about. <br><br>Yes, using them on FRS channels can be helpful between say the command post and a registration area a few hundred feet away. <br>
<br>Randy<br>WF5X<br><br><div class="gmail_quote">On Mon, Mar 14, 2011 at 11:53 AM, Bob Bruninga <span dir="ltr"><<a href="mailto:bruninga@usna.edu">bruninga@usna.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
Just did a circuit to be able to key a VOX radio either with audio or<br>
keyline without having DC connectivity. Just a single transistor twin-T<br>
oscillator set to 4.5 KHz. Either VOICE can key the radio, or I can<br>
manually key it over a long wire without having to turn the VOX on/and/off<br>
(from front panel buttons).<br>
<br>
The 4.5 KHz cannot be heard, yet it keys the radio and can be mixed with any<br>
other audio as needed.<br>
<br>
Idea is an FRS STOCK radio 200' away on top of my building with a 3<br>
conductor audio line plugged into the external speaker/audio jack. Radio is<br>
inside a short PVC pipe for the weather, but now I can key it from<br>
downstairs.. Where I can monitor the local student activity with a speaker<br>
(and Mic audio source).<br>
<br>
I just bought 10 packs (20 radios with chargers) for $299 including free<br>
shipping. Think about it. That is the cost of 1 ham radio HT, yet now I<br>
can supply 20 radio club students with radios and not all of them even need<br>
a ham license to contribute. It's a small price to pay to get 20 people on<br>
the air.<br>
<br>
[No, APRS is not legal on them, nor is connecting two of them back-to-back<br>
to make a repeater...]<br>
<br>
These FRS radios have 22 UHF channels, have VOX and have all 38 PL/CTCSS and<br>
also all 83 DCS codes too. Plus NiCd batteries and chargers for only $15<br>
per radio. Oh, they not only scan the channels but also have TONE and DCS<br>
scan! They operate at 1 watt on most channels (.5W on the 7 FRS only<br>
channels). Each ham radio response organization should consider investing<br>
in dozens of these radios to have on hand for ANY local event. It multiplies<br>
our capabilities by letting more bodies participate.<br>
<br>
I have tested them compared to my Kenwood TH-D7 and they have the SAME<br>
excellent sensitivity on the FRS/GMRS frequencies as the D7 has on the ham<br>
bands.<br>
<br>
Bob, Wb4APR<br>
<br>
<br>
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</blockquote></div><br>