Comet CTC-50M CTC50M CTC 50M CTC/50M Original Window Feed-Thru Jumper W/UHF Female (SO-239) Connectors at Each End

At best, this is a stop-gap device. Though I have a good experience with it across the VHF amateur band (1.2:1 SWR) I have issues with it on 70cm. The SWR at the low end of this band is ok but it rises sharply towards the top end to over 1.7:1. The stated insertion loss seems pretty accurate and it too rises shaarply on 70cm. My suspicion is that it was designed for primary use in Hf up through VHF but the manufacturer pushed its use on UHF to maximize sales. Unfortunately there arent many alternatives around (MFJ if your window has an opening up to 48). Otherwise the tape is quite flimsy and will, no doubt, turn brittle in UV light. At best, for my use, I can only rate it 3 stars...and thats pushing it.

This has turned out to be a great solution for getting a coax line out of the shack. Bought a second one and switch between 2 antennas. I have double sash windows, so in my case I can still open the window without disturbing the Comets CTC-50Ms.

I like the profile of these window jumper cables because I don’t like the larger pass-through units. I have one for each of my antennas and built a small cover for them to help protect them from the rain and snow we get where I live. They are compact, but very well built and I haven’t noticed any change in reception or transmission quality. I’d buy another if I needed to without hesitation.

Not exactly what the doctor ordered but the next best thing. Haven’t installed it yet but anticipate that it will work.

Works great! Window closes completely. I use one for 2 meters and another for HF.

Works as advertised

I used my window pass thru for about six months in a second floor window. The first one failed after only two weeks. The next one lasted about 5 months. If you are using this with a wire antenna, be careful to provide some strain relief if you are putting any strain on the coax cable. The foil connectors that attach to the hard plastic where the SO239 connectors are are not durable. If you are simply running the coax without any tension this may work great for you. But I was running a sloper and it failed twice. I switched to the a Diamond brand of one of these and we will see how it holds up. Comet makes good products, but this one just is not durable under stress. Every other Comet product I’ve had worked great.

It sat in the the window frame and the window closed with no problem. So far, it has exhibited insignificant signal loss on both 145 and 440 MHz

Using this on a window that seldom opens. I didnt measure any lose loss in signal strength. Accurate description and performance.

Great product; as advertised.