LeoG

Never expected it to. It's absolutely a compromise. But what it does is allow you to figure out what channel might work best for you in your area. And when you figure that out you can commit to a tuned duplexer. Of course when I first started out I didn't know squat about any of this stuff. And that was a little bit more than a year ago when I got a pair of HTs. But I'm a quick learner and generally don't need to ask questions because I can find answers myself. But duplexers are simple and complex at the same time and it took many vids before I understood how they worked. I always knew what they did. I'm excited to see if it'll improve my reception. We have 2 repeaters nearby. Commercial repeaters all gussied up with the best of the best. And you can tell by how they receive, very sensitive. While mine being much closer wasn't that sensitive. Kinda frustrating. Hoping for a similar sensitivity with the better tuned duplexer. Of course the commercial ones have the advantage of being 700ft+ in the air while mine currently sits at 40ft.

Yep, I can't wait to do a real world test when I put it back in the RPT50 Btech. Right now I have a wide band tuned duplexer in it that they sent as a replacement. And this duplexer worked much better than the one I gave Marc to tune. As soon as I swapped out I noticed a marked improvement in reception. Not sure how it's tuned, if it's the same tuning as the one I gave to Marc or something else. It's probably tuned better than the original just from the fact I could get better reception out of it. I've done a lot of real world testing with my current setup. I know where I can hit it and where I can't and where it's iffy. It's the iffy spots I'm hoping to see better results. And Marc I just want to say it so the people here see it too. Thanks for doing this. I appreciate your effort and I'm looking forward to putting it to good use. I know you just wanted to play with your toys, but it's hopefully going to be a real world difference for my repeater. This way we can both have our fun. And just think, now I'll have that other duplexer.....

Ya, 2 months ago.

All my contacts with customer support for Tidradio have been positive. They've never told me no we won't replace it. And they've never asked for the old one to be returned.

Wait and save up some more money. $100 isn't going to get you a quality setup. It'll be more satisfying if you start off with a nice setup instead of replacing it a few time and buying the same thing more than once. I would start with an antenna with a 7.2dBi gain and some LMR400. Find out what it costs and save up for it. You'll also need a chimney mount or roof mount which is going to add to the price tag. Along with minor things like cable clips, water proofing, tools for installation etc. If you are insistent on getting something up now then go with some sort of a mobile antenna. Even something small mounted up high is going to be better than something inside the house on a lower floor.

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.

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

The new fangled radios are all computers now. And just as any computer might need the occasional reboot so do radios. Having to do the reset is just a step farther. I had to do it on one of my Wouxun radios that was acting weird. Fixed it up and I just hooked it up to the computer and reflashed my channels back into it. 5 minutes and done. But this would be a serious problem if it was an emergency. Good old fashion radio guts with no computer can have an advantage sometimes. Same goes with automobiles.

Btech will send you one for free. You just have to email them that you need it and send them a picture of your repeaters serial number. Took it about 3 days to get to me. The new setups come with the cord.

Just talked with Btech and the 1.010R is a minor bug fix. If you've put the 1.008R update in there you're good to go as far as updates go. If you are still on 1.003R then do the update, it's fairly straight forward if you have the RJ45 connector. It's just a straight cord with a USB-A and an RJ45, no chip.

There is an update to the repeater 1.008R that should allow you to operate the input with no tone. There is also a squelch function with the new version. Mine was defaulted to 5 and interferred with low signals. I dropped it to 1. I see that they have a new update of 1.010R now.

Just because it looks like it, doesn't mean it is. But in this case I think the cat squished the roof.

Well that message went out then a bunch of tanker planes shipped out overseas. Could be coincidence, might be reality. Strange times right now. I hate this movie.

Happened a couple days ago.

Since it's in my repeater and my repeater has 5MHz spacing I would say that it can be tuned for that spacing.

Conflicting info 50W RF Power Handling 6 Cavity Design Minimum Tx and Rx frequency difference: UHF 3MHz Maximum Tx and Rx frequency difference: UHF 12MHz Fequency Range: UHF 400-470MHz(the full band) Bandwidth:±500kHz Standard Termination: N Connector Frequency Spacing: 8-10MHz Insertion Loss:≤1.0dB Nominal Impedance: 50Ω V.S.W.R:≤1.5 Suppression:>75 Isolation:>75dB Free Frequency Tuning Easy to build your repeater Weight:1.8Kg

No reference to my-450-sqg-50 on the interwebby And the other number had no reference either.

I had an Uncle who was an Admiral in the Navy out of Groton. Passed away and only my Aunt is survived. No one in Rhode Island that I know of LOL

It's totally possible. The new one came nicely pack in a bubble bag surrounded by foam in a thin cardboard box. I just pulled it out and the old one that I'm storing in that box I checked the tuning screws and they are as tight as can be. And here's the original one that I replace with the one sent by Btech. Looks like a different brand, probably the cheapest they could find until they found out you need to buy them twice which isn't making it cheaper.

Ya, thanks for the offer. Up in CT so kinda far to travel. But maybe I'll get sick of working up and take a couple days off and go visiting. Got people as far down as Florida and Texas I'd like to meet up with some day to make the imaginary internet friend real friends.

No, directly from Btech. I ordered the repeater from them. They decided the duplexer was troublesome and sent me a new one already tuned to the GMRS spectrum. I removed the old and installed the new. I still have the old one, they didn't want it back.

The repeater I ordered was new and apparently they got a bunch of defective duplexers and needed to replace them. OffroaderX can tell you all about that. So the company just sent me a new one already tuned to receive the GMRS frequencies.

I would actually like to get one tuned to the frequency I use to see if it changes anything. Not planning on moving the frequency anytime soon so a hard tuned duplexer would be just fine. I would just remove the broad tuned one out of the machine and replace it with the single band tuned. Pretty simple operation. Probably less than 1/2 hour. That's about what it took me to do when I didn't know what I was doing, although not knowing what I was doing was just based on never had done it before. It's just removing some screws, swapping out the coax one for one and returning the screw back in place.

I have the Btech RT50 and it has a full spectrum GMRS duplexer. It says it's rated at .25µV at 12dB SINAD. Can't say I can prove it but it seems to receive well for the antenna and it's height. This is the replacement duplexer they sent me. The originals sensitivity was much worse than the replacement. Tuned full band.