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Old 2-Nov-2018, 2:56 PM   #6
Retired A/V Tech
Join Date: Aug 2012
Location: S.E. VA
Posts: 2,453
The correct device to combine a UHF antenna with a VHF antenna is not a splitter in reverse, it is a UVSJ (UHF/VHF Separator/Joiner), also known as a UHF/VHF combiner or a UHF/VHF Diplexer. A UVSJ looks like a splitter, but it is very different inside.

The RCA TVPRAMP1FR has separate UHF and VHF inputs, so you do not need a UVSJ, just set the switch to separate. That switch has a history of causing problems; sometimes it doesn't make good contact with the VHF antenna in the separate position. If that happens to you, set the switch to combined, and combine the two antennas with a UVSJ before the preamp input.

The quality control for the RCA preamp isn't very good, and some fail early because of power adapter problems. The one that I have been testing for the AVS Forum is now giving me different voltage and current readings than when it was new. I have ordered another one, even with the new higher price, to try to figure what is normal for that amp.

I only recommend it for people that understand it isn't as reliable as other preamps.
If you can not measure it, you can not improve it.
Lord Kelvin, 1883

Last edited by rabbit73; 2-Nov-2018 at 3:02 PM.
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