Fumei UHF 400-470MHz 50W Duplexer for Radio Repeater with Preset Low Frequency 462MHz & High Frequency 467MHz & N Female connectors

So far so good, I have seen reviews that have not been very positive but during testing I have found that the one I have received works very well right out of the box. I am using a Ra87 repeater setup and the SWR is coming in at 1.02 on the low end and 1.05 on the high end and the 40 watt radio is coming out of the duplexer at 24 watts, so I am very happy with the one I received, I am about to purchase the 30 watt version to use with a bug out five watt hand held repeater setup. I would recommend at least giving them a try especially if you are on a tight budget.

Good little duplexer! I'm using it for a low-power mobile repeater, and it's working fine. Initial tuning out of the box was garbage (like only a -60 dB notch on the low side, though a -100 dB notch on the high side), but that didn't matter because I was going to tune it myself anyway.Tuning was straightforward with my HP 8714ES VNA, if a bit touchy. Breathe on the tuning screws while the jam nuts were loose and the null would shift a hundred kHz. Took a while to get it dialed in, and it was a challenge to tighten down the jam nuts without moving the notch, but again, there weren't any real surprises. All pretty standard stuff. See the attached photos for the post-tuning transmission as measurement by my VNA. Managed about a 90 dB notch and about a 1.5 dB insertion loss on both legs.Construction seems nice and solid.

I tried using this duplexer on my repeater which was installed at a mountain top transmitter site. It was useless because the noise floor was high at this location. I even had it tuned before it was shipped to me. Eventually, I had to spend real money on a set of Telewave cans. It was painful to spend the cash but the old saying is true... you get what you pay for.

Although the notch may be tuned to acceptable levels. The pass and is also tuned well within the notch making insertion loss at around -5db. After tuning myself, I got the Duplexer will within tolerable specs.Go with a Duplexer that has been tuned to your specific frequencies.

Im setting up a GMRS UHF repeater for a friend and these duplexers were recommended as a value priced 50 watt duplexer set. I did not pay attention to how they came tuned as I had planned on tuning them to a specific frequency anyway. The tuned up easily and the isolation was within specs.I would recommend them for a budget priced UHF duplexer.

I purchased this for a dual KG-1000G setup. I used a vna and tuned to perfection. Was very amazed at initial performance. Over the winter it degraded considerably however. The great guys at buytwowayradios explained the poor performance was probably due to the high static voltage (I never knew) breakdown of the Teflon spacers and there really isn't a fix. I guess it's a common issue with initial performance going downhill on these. Bummer, price was right, worked superbly initially. You be the judge. Update: Dave at bytwowayradios was correct in his assumption. The insulators (2) did have burn holes in the Teflon as he explained in his duplexer YouTube video. It appears to be a common problem on this style, regardless of brand. The mfg distributor plans to provide some relief towards a new one, however if the Teflon bushings could be purchased, it could be easily repaired. Unfortunately not available. Fyi I'm running full 50w radios

Purchase this for my repeater for GMRS

OK, so I purchased the 30w version of this unit first, and after receiving two defective ones, gave up and got this 50w version instead. Very pleased with this unit. The factory tuning was close to the claimed 462.000 MHz and 467.000 MHz frequencies, but was not spot on (see the photos). I needed this tuned for 462.550 and 467.550 and was able to tune it up in about 10 minutes (most of that time was spent making connections and setting up the analyzer). I was able to achieve a ~100dBm notch on the desired frequency (both high and low), and about a ~1.1dBm insertion loss on each side as well. While I would prefer the insertion loss be lower, it is acceptable considering the size and price point of this unit.