nokones

Yah, I know. I was born and grew up in Orange County and a 5.1 earthquake is nothing more than a liquor bottle and dish rattler. Some of those liquor bottles and dishes may make their way to the floor. In other words, its a no-bigee.

And there was an earthquake.

What PL are you using on the 675 freq pair?

The DILA 550 repeater is an open repeater thus doesn't care what language is inputed into it. Whatever goes in should come out the same.

That is the freq pair for the "Sheep 725" repeater located on Mt. Lowe near Mt. Disappointment/Mt. Wilson.

A project of this nature is more involved than you think because of governmental bureaucracy. The funding of equipment, installation, engineering, and staffing; and in some cases the respective agency's employee union(s) may also be a matter.

Have you tried the Dila 550 and Sheep 725 repeaters? There both open repeaters.

Isn't the GMRS Repeter, a.k.a. "Repeater" Channel pairs, are actually designated as GMRS channels 23-30 and the GMRS channels 15-22 are actually simplex operated channels?

Have you tried to contact an Aviation Avionics Repair/Service Company? Most of them specialize in aviation audio systems and have dealt with interfacing numerous systems to aviation onboard intercom systems. Some of them build custom audio/intercom systems that interface with various LMR systems. More than likely they may not provide any information for free but, you can try to see if they have the info you're seeking and decide from there if you want to pay or not.

Positive/red wire from the radio to the positive or plus post/contact on the power supply and the negative/black wire from the radio to the negative/minus/ground post/contact on the power supply.

Very good point!

I had a feeling that was the case and I expected no less.

I think the Jeep guy's response was in future tense not in past tense. Although, since I am not an expert, just a lowly ol' internet user, I could be wrong.

That would be UHF TV channels 14-18 a.k.a "T-Band". I believe TV Channel 14 (470-475 MHz) is used in the San Francisco TV market which is near the OP's location and the rest of the T-Band freqs are used for LMR stations in the Bay Area.

The SAC 625 repeater should cover most of the bike trail and may stop providing coverage as you approach Sunrise Blvd. I doubt that you will have coverage beyond Sunrise. The Orangevale 725 most likely will over shoot the bike trail as you ride along the bluffs past Sunrise.

You didn't see that I pasted the OPs post to to response which the subject was the repeaters in the Sacramento Area? What other repeaters do you think I would be responding/referencing?

I was referring to the repeaters in the Sacramento Area and there are not 917 repeaters in Sacramento.

PL means Private Line which is a Motorola term for CTCSS which stands for Continuous Tone Code Squelch System. It is a function tone to squelch your receiver or open up a receiver and is analog in Hertz, i.e. 141.3 Hz which is the GMRS travel tone. DPL is also a Motorola term for Digital Private Line also known as DCS Digital code system which is a digital coded squelch system that sends a digital coded bit stream to do the same thing as the analog tone system. The first DPL code on the list is 023 and the last is somewhere in the mid to high 700s. By the way, Private does not mean your radio communication is Private. It just a nuisance eliminator function so you don't hear other radio traffic if you don't want to. The cheap consumer radios don't use the actual tone frequencies or digital codes for the specific tones/codes. They use a programming number i.e. the programming number for the 67.0 Hz CTCSS is "1" and the programming number for the first DPL is also "1" for most of the cheap radios. Some cheap radios continue with the numbering scheme after the last analog tone.

Most of the repeaters require permission to be submitted via this site and a license.

The Shaw Butte repeater is linked with the Southwest Community Radio System (SWCRS) network of other repeaters throughout Arizona, New Mexico, Texas, Colorado, and I think Utah. The Shaw Butte repeater has two access modes, one for the local mode only, no link to the network; and one for the network mode to link up with the other linked repeaters. The linked repeaters in Arizona are Shaw Butte, Towers 600, Mt Elden, Diamond Point, Greens Peak, Pinal, Mt. Lemmon, and others. The DPL code is for the linked network access and the local mode requires the CTCSS/ PL of 100.0 Hz. There is no tone on the downlink side. If you want to communicate with other stations near the other repeaters both stations would have to access the respective repeaters with the link tones. Also, if you want to participate in the Sunday and Wednesday Nets, you'll have to access the network with the link tones.

I would try using a Laird B4502N antenna that you can get from Arcadian Antenna. They have a warehouse in Phoenix and it would only take a day or two to get it. The B4502N is a base load NMO mount 1/2 wave non-ground plane 2.4 dB gain omni-directional antenna. If the antenna is properly trimmed for use on GMRS freqs ( tune for high 464-low 465 MHz freqs) the rod would be about 10 1/2" high/long.

When discussing ctcss/pl tones and dcs/dpl codes that are split between the mobile/base stations and the mobile relay (repeater) stations can be confusing to most users when using terms such as encode and decode, transmit and receive, input and output. I believe it would be less confusing to most people when discussing split tones/codes that if naming terms such as uplink and downlink where used would help a lot.

Is it possible to guy wire the tower? Would you have the unobstructed space to guy it? What would the requirements be for the anchor points and will the soil accommodate the anchor points without any difficulty? More than likely the tower wasn't engineered/designed for being guyed since it is a free standing tower and you may have to do some modification to the tower. Just a thought.

There is an easy fix for your two repeater problem. You can either program the two 675 repeater freqs and tones in the custom programming channel slots, 8-14, or one repeater freq and tone(s) pair in one of the 8-14 channel slots, and set the appropriate CTCSS/DCS tone(s) for the other 675 repeater on Repeater Channel 28. Don't forget to set the other parameter settings that those two repeaters require such as the bandwidth/channel spacing setting, etc. One of the problems that I have with the Midland GMRS radio is that CTCSS/DCS table does not include extra non-standard tones in their table and they have no intention to include them in the future. Another issue with consumer grade GMRS radios is that they don't have a true monitor feature whereas the feature will put the channel receive in a carrier squelch mode to defeat the PL Tone Decoder, and a Talkaround/Direct feature whereas the radio will transmit on the programmed receive freq setting instead of the transmit freq setting when you want to transmit simplex. You have to burn one of the precious channel resources to have a talkaround/simplex channel to do so. My first GMRS Radio was a MXT400. It's not a bad radio but, you're limited in what you can do with the radio. If you only need to have access to just a handful of channels than it's not a bad radio. The price for this radio with just a few capabilities is a tad high for a consumer grade radio. I sold my first GMRS MXT400 radio within three weeks after I got it and bought a better quality mobile radio that has the features I was looking for in a mobile radio.

What channel are you using?