SteveShannon

SWR is a calculation that involves the ratio between forward power and reflected power. It’s very hard to say without putting an antenna analyzer on it, but it could simply be that the directional coupler in whatever you’re using to measure SWR isn’t capable of measuring the reflected power at the lower power setting.  That’s not uncommon with external watt/SWR meters.  If reflected power cannot be measured SWR becomes nearly perfect. 
Sweeping the system with an antenna analyzer would help.

I had one on a four foot RG-8x jumper I built just the other day.  I didn’t do the repetitive checking you correctly recommend.  I knew it was almost certainly just a single strand, and I was even tempted to connect the shield and center to the two posts on a battery to see if I could just zap it like a bug zapper. Instead I cut off the end and replaced it, being more careful that time. I had checked the other end before crimping so I was certain which end it was in.  

Look for a damaged coax. 

SWR is a calculation that involves the ratio between forward power and reflected power. It’s very hard to say without putting an antenna analyzer on it, but it could simply be that the directional coupler in whatever you’re using to measure SWR isn’t capable of measuring the reflected power at the lower power setting.  That’s not uncommon with external watt/SWR meters.  If reflected power cannot be measured SWR becomes nearly perfect. 
Sweeping the system with an antenna analyzer would help.

With all CPS software:
Make sure you load the driver first, before ever plugging in the cable. Most require you to select the correct com port.  

You can try messaging @Quantum8 using the private messaging features of the forum or you can write them using snail mail.  

And yes being inside a garage can affect the SWR some. Things like a very low ceiling and metal garage door tracks will mess with the antenna SWR. I've noticed that with my antennas.
I have a Comet SBB1 on my Ford Escape and it barely clears the garage door and the tracks are pretty low. SWR is fine on 2m and 70cm but high on GMRS when I test with the Escape parked in the garage. The SWR is lower on all three bands when I test with the Escape parked in the driveway. 

I have not seen this here in Minnesota as far as dimming with age or freezing.  When it's well below zero they tend to take additional time to fully display, but they come on fully after at most 20-30 seconds at -20. This on Kenwood, Yaesu and Retivis rigs in the truck.

SWR is a calculation that involves the ratio between forward power and reflected power. It’s very hard to say without putting an antenna analyzer on it, but it could simply be that the directional coupler in whatever you’re using to measure SWR isn’t capable of measuring the reflected power at the lower power setting.  That’s not uncommon with external watt/SWR meters.  If reflected power cannot be measured SWR becomes nearly perfect. 
Sweeping the system with an antenna analyzer would help.

You sure it doesn't need a ground plane?

Great job reading and understanding the actual question, something I failed to do.

I also missed that 1 silly little "b" haha

Great job reading and understanding the actual question, something I failed to do.

The published operating temperatures are -20°C ~ +60°C, which is -4F to 140F. You were definitely outside the operating temps. Most of the commercial stuff is rated for -22F to 140F or better. I've never had an issue with my Kenwood stuff, and that comes on when the car starts.

Ive never had issue but all my gear is commercial LMR other than my HAM radio. I run a TMD700 in the wifes JK and for 10 years in upstate NY had not one issue. 

Welcome from this Army Security Agency/INSCOM Vet here in the Twin Cities!  Depending where you are up there in the North, some decent coverage repeaters. I use a few of them that are strategically located near a couple of the OHV Parks I like to off road the Truck in.  If you get down to the Cities, there's a decent group of us on Ch. 19 Simplex, as well as some good repeaters that sometimes have traffic on them.  Otherwise, you will find that GMRS can be a bit of a "bring your own" radio service.  My wife and I use it up north where cell phones are spotty, as well as around the spread at home so as to keep in touch without having to yell!.
Enjoy going down the rabbit hole!
73 de WRJG283

I use cross band repeat on my base radio (Icom IC-2730) quite often when I am working around outside. I can get into the local 2m repeater with my HT but I don't have the best signal doing so. I don't have to worry about where I am standing or which direction I am facing when using the HT when I use cross band repeats on my base radio.

the RX only above channel slot 54 applies only when the radio is operating in GMRS mode.
if you are in the unlocked "Normal" mode... there are no restrictions.

I am not sure if there are any similar restrictions in HAM mode.

Good day!
I apologize if this question has been asked/answered -- I did some searching and wasn't able to find anything specific to this, yet I don't believe I'm the first person to encounter this.
TLDR; I can't transmit on a second similar frequency channel with or without a "privacy code"
I know "privacy code" usage isn't private. I'm using it as a general term for using DCS/CTCSS codes to reduce hearing unwanted signals.
Equipment: I have a TIDRADIO TD-H3 (HAM version) running in GMRS mode
The firmware version is GMRS_240817 I can and have programmed it on Odmaster or CHIRP I can do some limited work on the HT itself I just got it this week, so I'm still a little new (Jan. 15 2025) Intent: My younger children have some FRS radios where I used FRS/GMRS Channel 1 plus a "privacy code" to (a) reduce some of the distraction from area GMRS/FRS users (b) potentially reduce the possibility that their ears might hear something inappropriate. I'd still like to be able to switch to a regular "privacy code"-free channel when I'm away.
I want to talk to communicate with them from my TD-H3.
Situation: I can't transmit out on higher of the TD-HD3's two channels if I have a mixture of privacy code and non-privacy code for the same frequency. The radio prevents transmitting on the higher channel of the same simplex frequency. Example: If I use GMRS freq. 1 and put the "privacy code" on HT radio channel 1. I then use a "privacy code" free GMRS freq. 1 on the HT radio's channel/slot 100. I can transmit out and be heard on the FRS radio when I use HT slot 1, but can't actually transmit (and hear a rejection tone) when I use the HT radios slot 100 on the same frequency. If I make HT slot 1 clear of codes and make HT slot 100 the same frequency as channel 1, but use a "privacy code", the radio blocked me from transmitting on slot 100.
I discovered this after several hours of troubleshooting and hand-wringing. It didn't matter whether I used DCS or CTCSS. I then tried using "privacy code" on the lower radio channel and put the privacy free* on the greater channel and saw I could use a privacy code successfully. What's a little weird is that I have a repeater setup with a CT tone and the radio will transmit fine.
I don't know if this is by design or a limitation of the TD-H3 and similar firmware. For all I know, it might be a general phenomenon of TIDRADIO products.

Comparison: I have a brand new pair of Baofeng 5RMs that I would like to see if they exhibit the same phenomenon, but there are issues with the programming over the cable preventing me from quickly programming them. Maybe I'll figure out how to program them on the keypad. Observation: I get the feeling that Baofeng and TIDRADIO are basically the same manufacturer but simply different brands.
Kind regards,
Jim
Woodleaf, NC USA
WSGP797

Instead of “work” I would say “transmit”, if that’s accurate. “Won’t work” doesn’t provide enough information. 

Apparently if you program the channels higher than 54 they’re all RX only. 
But most of the software used has the ability to inhibit TX on a per channel basis. 

Good job!  Trust me when I say any one of us could do the same thing. 

I did this for myself.  Used the BTECH 50w, 50' LMR400 with a 7.2dBi gain antenna about 40' up.  I have it at my shop so I can contact my wife at home with an HT.  My house is near the river, AKA in a hole.  I have my antenna on the house about 40' up and it has LOS without not counting the trees in the way.
The duplexer didn't exactly fail on the 1st one but they replaced it because of my complaints and the reception of the new duplexer is substantially better than the original.
The BTECH seems to be operating well.  I don't care for the way it reacts on digital tones, on analog ones it's perfect.  They haven't got the morse code setting the way you would think it should work, every 15 minutes while the repeater is busy and quiet otherwise.
Best thing about having the repeater at the shop (your home) is you get to have free range with an HT in the house or yard/neighborhood.  I travel about a 5 mile circle and can still hit my shop.  But I live in an area that is very hilly so unless the antenna is up 150'+ some areas will always be a challenge.
If you are up high and contacting your family in a valley then it should work much better.

I've got a concrete ready-mix company in the Mid Atlantic area with over 100 trucks using M1225 and PM400 radios in their fleet. They've been a customer since 1998, and they're still using some of the original radios that we sold to them. They go through palm mics & external speakers (which get clogged with concrete dust) but the radios sit in trucks that are parked outside all the time. They see temps from Zero to 90 every year. They get about as much use and abuse as any radio I've ever seen, and the M1225/PM400's are nearly bulletproof in my experience.
The M1225 is Part 95 type accepted. The PM400 is not, but is just the updated version.
Either one can be bought used all day long for prices similar to any of the CCR models listed above. Many sellers will program them for you.

Yep, folds away cleanly. You'll never know there's radios in the truck except for the antennas. And if you look in you will see only one of the mics.