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Motorola invented CTCSS. This was called "Private line" PL tones. I believe there were 38 original tones. Older Motorola equipment only has access to the original 38 tones. "Private Line" is a trademark of Motorola. WRCW870

I have a the radio shop working on a Vertex Standard low band radio to change it to 6 meters. The shop has the programming software however on this radio the "Service Software" is a separate program. I am needing to locate "SVS-49 Service Software" to turn the power down as the instructions online say needs to be done. The radio shop says they have had no luck.Any help would be great. The radio is a VX-6000L 120 Watts. Instructions online say to reduce power to 100 watts to protect finals. The software is the "service and alignment" software. Thanks Lee WRCW870, KI5GXD

AXORLOV, thank you for correcting my drawing. This would be a short term solution. 48 hours. This is a better and correct drawing. Thanks

This is a radio question from my AUXCOMM class. The scenario was a cell site with 48V power system has lost it's normal power supply and batter charging ability. Also 2 Public safety repeaters are on this battery source and battery power will run out in 4 to 6 hours. I have drawn a picture of a possible solution. 4 12 volt batteries in series to make 48V and 4 12 volt batter chargers to recharge the 12 volt batteries in series. Will this work? Repairs will be made in 48 hours. Thank you for looking. WRCW870 Lee.

Don't know if this was covered. If it has been please disregard. Do you have your channel programmed into your radio for tone squelch or just squelch? Had to change mine to tone squelch. Farmer on same channel but not on repeater coming on the base at the house. Changed to tone squelch, farmer is still there my radio sees the transmission still buy unless on correct tone I no longer hear it. Hope this helps. WRCW870

What information to I need to provide to the person setting up a DMR repeater for me? Frequency's, Repeater ID from "RadioID.net" ? The repeater is a Vertex VXD-R70. The person selling said he will program and set up. I don't know how. I don't know what information he needs to program. Thanks KI5GXD

I have been thinking about this for some time now. The ham radio club has an antenna on a 500ft tower. Nice coverage from this location. The antenna is a DB420 (460-470Mhz) model. They have been using this for some years with no issues. I have been told this is possible. I have reached out to several places with no answer or just no response. Ham repeater is 444.250 and the GMRS would be 462.?. This is a 18Mhz spread. Both repeaters to use there currently tuned duplexers. Combine them with another duplexer that simply blocks the other transmitter. Is this proper thinking? Just need to protect from transmitter power from each other. I have a DB4076 that I could use for the combiner duplexer. Thank you for your time. WRCW870 KI5GXD

Link to video: The antenna is a DB420B. The local ham club is using a DB420B on the 70cm machine. Frequency is 444.525 and it has been working fine for years.

I have reached out to Bridge Comm. They have a video using 3 duplexers to combine 2 repeaters to one antenna. I have failed to get a response from them at this time. Who would be able to help with this type of setup? I do have an application: One GMRS Repeater on Channel 21 and One 70cm Repeater on a yet to assigned pair. The split should be about 18 Mhz between pairs. Bridge Comm is using 2 4 cavity duplexers and one 8 cavity duplexer. I have been researching this and found RX TX Systems has much information on this subject. However they use a combiner set up. I plan to reach out to Bridge Comm again. Any help would be great. Also don't think this matters the 70cm repeater will be DMR. Thanks KI5GXD WRCW870

Thank everyone for there feed back. No cell service. Try to contact emergency service through Amateur or GRMS by Relay. The last resort. Contact Emergency services on public service channels. At this time I could not foresee a time I would need to do this. Just asking the question. Thanks WRCW870 KI5GXD

This is not a GMRS question. I have just programmed all the State Emergency Management Interoperability channels into my D578. There are 3 channels that are common interoperability channels. They are listed as: OK Law 1, OK LGMA 1, and OK Net 1. The question: If it became necessary to contact the local law enforcement agency for an emergency purpose. (of course). What would be the contact protocol? Would one use your Armature call sign or GMRS call sign? Or just use name, rank, and serial number? Thanks for the feed back. I like the new web site and network map. WRCW870 KI5GXD REACT 6259

Good thing I'm not a "SOONER" fan. GO COWBOYS!

The "Travel Tone" is CTCSS 141.3 Hz. Has become a standard tone for travelers and others to talk to each other. I hear traffic on this tone on many different channels of GMRS. Weatherford OK is right on I-40. WRCW870

I have my base station back up after my lighting strike. I monitor MURS, and GMRS Channels 1-22. I have the FRS 8-14 programmed for monitoring. I have overserved a great number of people using the Travel Tone" . I have all the channels programmed into my D578 with the travel tone. If these users are using the travel tone in my book they want to be talked to by other operators? I get some positive replies and some less the positive replies when I try to talk back to them. So what I guess I am asking. Is why use the "Travel Tone" if you don't want to be bothered? Thanks WRCW870