Originally Posted by rcbtaw
Thank you for answering my question. I wanted to be certain that I gave you an accurate answer about a combo antenna equivalent to your combined separate antennas.
The MCM 33-2230 combiner IS described as a UVSJ, but there have been reports of problems with it. Maybe those users just had a defective unit, or didn't connect it properly. There is a part of the description that bothers me; it is either an error or is a design fault:
Insertion loss: 3.5dB
A UVSJ should have an insertion loss of less than 1 dB; usually about 0.5 dB.
I ordered 4 Stellar Labs coax jumpers that were described as equal to gold Monster cable jumpers for 1/4 the price. The quality was so bad, I couldn't even use them because the hex nuts were frozen.
If you suspect trouble with the MCM combiner, I suggest you substitute another brand of UVSJ.
Most UHF/VHF combo antennas have an integrated UVSJ that uses shorting stubs to block any UHF signals from the VHF section, but Winegard uses a combiner and balun in a plastic housing.
The RCA ANT751 uses shorting stubs:
This is the combiner used by Winegard:
How To Troubleshoot a Winegard Antenna Cartridge Housing