In the last week, I was able to swap out the Televes 560483 dual-input preamp, for the Televes 560383 single inout preamp. I've been in the process of checking and realigning my antennas to peak them to the arc. I have access to an H30D3 cable meter to do this. I've changed things up a bit since posting some results in this thread:
This post will be a bit long-winded, but I think it all needs to be given for background. My outdoor antenna system which is at about 25ft at present and installed with all PerfectVision 3Ghz swept RG-6 quad-shield & Thomas & Betts snap n seal connectors, consists of an AntennaCraft Y10-7-13...
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I now have BOTH my VHF High & UHF antennas going into the UVSJ, and the output of that going directly into the Televes 560383 preamp. The results so far, appear to be way superior to the Kitztech KT-200 preamp. From what I understand, the Televes has split-band amplification. Meaning the VHF & UHF preamp signal paths are adjusted independently.
I only have a single RF 12 VHF station, but even with the Y10-7-13 high gain antenna, was only getting a average signal level. I didn't want to amp it with the Kitztech, because that has no filtering, and VHF is especially sensitive to noise in the area. It's now up 10dB, and showing max signal on my Tivo diags screen (72/29, which is highest you can get for OTA on a Tivo Roamio, after it's internal AGC kicks in).
I'm only using a single UHF antenna for all the rest of my DMA's UHF station arc. 2 blow-torches on each end of that arc, some "not blow-torches" in the middle, and WFFC-LD low power station more or less in the dead middle. I'm about 5-6 miles beyond their furthest contour. I'm aimed directly at that station with the HDB91x. I now get a 55-57% signal strength and 23dB SNR. With the Kitztech, that was in the 40's for signal, and 16-17dB SNR.
My blowtorch stations aren't hurting that station, and the Televes preamps internal agc appears to be keeping those stations from overwhelming and swamping out WFFC-LD.
Once I'm positive that I have my antennas exactly where I want them for balance and stability, I will lock them down, take readings with the Televes for posting. I will them swap back to the Kitztech and its power inserter, and take readings to post that for comparison.
However, I now MUST retract what I said above in a previous post about the Televes 560483 dual-input preamp as "being bad". It simply was the wrong choice, for my system and needs.
As good of results as I am seeing now with the Televes 560383 single input preamp with stability and handling possible overload in my arc, yet pulling out that low power station, I'd have to say the dual input would be just as good, IF used under the proper situation it's designed for.
So, upshot from me is, after trying MANY preamps over many years, the present Televes is superior to everything out there. IF you feel you need a preamp in your antenna system, you shouldn't hesitate to buy the appropriate one from Televes, and try it for yourself. Just make sure you get the right version for your needs. Contact them and ask what would work best if you are unsure.