This is the chart that shows the common CLCC and GMRS freqs & channels along with the coded squelch for the Baofeng type of radios and the Midland "Blister Pack" type of radios. Same code, just different numbers. Like 6:00 PM and 1800 hours. The Baofeng tone/code is the actual standard...
@JohnVee thanks for the clarification. You are correct. The CLCC Motorola radios were previously in commercial/government/public safety applications. You will never find this type of Motorola radio in a blister pack at Walmart. New, they are programmed at the Motorola factory to meet the FCC...
Here is my suggestion to the CLCC guys regarding the GMRS channel plan. No feedback yet.
ONSC standardized comms - https://forum.ih8mud.com/threads/onsc-standardized-comms.1276700/ Post #15
Thoughts???
Here is a coverage map from the Shadowlands Campground. This is based on a GMRS freq with a 20 Watt transmitter and an antenna 10 feet in the air. Ideally, you want a base station radio at the operations center in the campground and a repeater on top of a mountain somewhere. If you send me...
Send me a map of the possible locations where you might put the repeater and the general area you want to cover. I will do plots to see which site has the best coverage.
OK, so at the risk of exposing the fact that I am a techno-nerd-geek, here is a different view of the advantage of a repeater.
This is an Google satellite view of the Cove where we hold the Fall Crawl. We camped at camp VI.
This is a propagation map of the coverage area of a base station...
Yep. Sorry, my chart is old and needs to be updated. Here is a detailed chart of the freqs. General Mobile Radio Service - Wikipedia - https://en.wikipedia.org/wiki/General_Mobile_Radio_Service
Clueless people were buying them and just putting in random numbers for the frequency and interfering with critical comms systems. We had tourists in the DC Mall talking about where to get lunch on an FBI frequency. 🤯
They are now FCC approved.
The fine print at the bottom of the ad. “Harmful interference” means don’t transmit on freqs you are not supposed/licensed to transmit on.
Safety Information :
This device complies with part 15 of the FCC Rules. Operation is subject to the condition that this device...
@Comet I will put a parts list together for you. Give me a couple of days.
@SeanLX and @GLTHFJ60 I would recommend programing all of the repeaters with the same frequencies. That way they are usable by both clubs when we get together for an event. Also, we could put repeaters from both clubs on...
Yes, they are GMRS freqs. The 462 block is for simplex and repeater output/transmit, the 467 block is for repeater input/receive. The 5 MHz between the two blocks is because repeaters need to have some separation between transmit & receive.
The bandwidth of the duplexer is very narrow, that's...
Yep. RSS software to program it and a RIB (Radio Interface Box) between the radio and computer.
The duplexer also has to be tuned to the operating frequencies. This is a manual process. 6 tuned cavities have to be tuned using a signal generator and a spectrum analyzer. The duplexer enables...