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We have a longer hand time set on our 2m Motorola Quantar 125 for this reason. The Quantar 125 has a pretty high spike in amp draw when it firsts starts transmitting. The spike is fast/short enough that amp meters can't get a good reading. This caused us some issues with our Renogy inverter. The repeater would cause the inverter to throw a ground fault error and shut down. Our fix was to have the Quantar plugged into a line conditioner and the line conditioner is plugged into the inverter.

my uncle, now deceased, had the ammo can version in his collection. It wasn't really an ammo can, it just looked line one. Yes, it was pretty heavy for its size. I remember lifting it and think, what the hell is in this thing.. He also had a Military AM portable radio (i can't remember what they called it) with the radio mounted above its power supply.. The power supply was DC or AC depending how it was configured in the field. That thing was very heavy.

Maybe, but there are a few different ones to try.

I did try one like it but the one I had did not work. It may be a bad one but I had better results with just the wire with the appropriate jacks on either end.

Im ordering it over the weekend. i really thing that's the missing part to the setup.

From what I remember there were different sizes of battery boxes that could be used with the PRC-77. They were heavy (for the size) even with just a single battery attached. And then you had the weight of any spare batteries you carried on your ruck sack.

My $25 Tidradio H3 does split tones. I have my repeater with a analog receive and a digital transmit. Mostly don't because of the interference issues I have at my house, nothing to do with trying to keep people off. But it's a private repeater so it doesn't matter anywho

Sure there is. A wait time for someone to answer so it doesn't unkey and then rekey quickly. It's not as bad but no matter what start and stop produce wear and tear even on electronics. And having a 2-3 second hang time gives your party time to respond without the transmitter going off and then back on. It certainly isn't the same wear and tear as a large relay and tube system. But electrical spikes in transistor circuits can be fatal.

didnt they have several variants of that radio? Backpack, ammo can, mobile, etc? The battery back is what made them heavy as in the ammo can and mobile version they were realitivitly small

I have not had any problems with my Q10H yet. But I have had other brands of radios act up. though usually just reloading stuff fixed them. I've had Icom and Yaesu radios have glitches too.

Make sure to fill us in..

I hated when I had to carry the PRC-77. At least I did not have to carry the PRC-77 at the same time carrying the M60 machine gun. The only SINCGARS radios I dealt with were vehicle mounted. They were heavy enough trying to carry from the shop to the vehicles for installation.

Just added that to my cart. I'm gonna test it next week.

I've looked at the spec's for the man-pack radio itself. https://en.wikipedia.org/wiki/AN/PRC-77_Portable_Transceiver At 1.5 to 2 watts for the size at the time seems crazy now days. Just think what a modem commercial, not military, grade P25 HT can do , 5 watts and with AES256 encryption. It would fit in a uniform shirt pocket. I also checked the spec's on the old WWII handie-talkies. I was shocked to see they only did 360 milliwatts! Remember that while watching those old B/W WWII movies. https://en.wikipedia.org/wiki/SCR-536

Okay, I reported your issue also.

I have the same issue & reset password & followed instructions. Still same issue. I am told I have to create an account in forum but it won't let me saying I already have an account.

Yup..

Hello, this is whats missing Amazon.com: ZEZEFUFU Two-Way Relay Walkie Talkie Repeater Box RX/TX for Baofeng UV-5R Accessories 5MHz U-V V-U Cross Band Walkie Talkie Repeater : Electronics

Okay, check your email to see if you received a password change link. Follow it, bla, bla, bla.

I am thinking you need to swap radios on the duplexer ports. Like, I think they are labeled backwards. It would make sense that the case of the HT is letting enough RF leak in to trigger a receive light, but there is not enough of a signal to create usable audio output to trigger the vox operation. If its not labeled wrong and it is wired correctly, you could just be washing out the systems due to being to close to each other and too close with the test handheld. I have seen some HTs so sensitive to RFI from other HTs, that we had to separate them by 75 to 100 yards before the RFI and desense was small enough for the radios to work correctly.

I haven’t tried it. Won’t be able to test it til Friday but definitely worth the attempt. Thanks for the tip.

So this is a full spectrum tuned duplexer. Says 550-725 on the label. So have you tried this on other frequencies? How about separating the RX and TX HTs. Put on of them in a metal box to try to isolate it. Maybe the common antenna is desensing the HTs

@marcspaz Yes, using cable exactly as you describe with Vox. Yes, it seems to work without going to the duplexer using whip antennas. There’s some background noise but I figure that’s due to the proximity of the antennas. This is what happens. As a separate troubleshooting effort, I moved the common antenna away when the HTs were connected at one point. Still nothing. It seems to be on the receiving radios output or the transmitting radios input. But the connection cable works fine without the duplexer so I’m leaning more to duplexer issue. I’m open to suggestions.

I need to ask some questions... You are using a cable to go from the receiver audio out to the mic audio in, and set to vox? Correct? If you simply remove the antenna cables from the duplexer, everything works (as well as to be expected without a duplexer, anyway)? When you hook up the duplexer, the receiver receives a signal, gets a green light, but the transmit radio doesn't go into transmit mode, even though vox works fine without the duplexer? Or does the transmit light/display indicate that the transmitter is actually transmitting, but there is just no output from the duplexer?

Thanks! I found it.