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Old 2-Aug-2016, 6:44 PM   #2
rabbit73
Retired A/V Tech
 
Join Date: Aug 2012
Location: S.E. VA
Posts: 2,747
Quote:
The UHF Pass select switch on the combiner is ON.
That switch is not to pass a signal, it is to pass DC power to a preamp that is between the combiner and the UHF antenna.

Please try to keep your photos to no wider than 800 pixels. When they are wider, the posts are too wide and the type is too small when I try to see the whole photo.

There have been problems with the MCM combiner, but if you connected the VHF antenna directly to the test TV, that bypasses the combiner.

Yes, the 30-2476 should be doing better.

The antennas are waaaay too close together, but that shouldn't make the 30-2476 that much worse than the dipole, or maybe it will.
https://www.tonercable.com/pdf/antenna.pdf

What are you using to measure signal strength and signal quality?

Possibilities:

Bad connection between VHF antenna and TV

Bad balun in antenna

If the power inserter had been connected to the combiner, and the VHF antenna had been connected to the UHF port of the combiner, and the switch was ON, that might damage the VHF balun.
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If you can not measure it, you can not improve it.
Lord Kelvin, 1883
http://www.megalithia.com/elect/aeri...ttpoorman.html

Last edited by rabbit73; 2-Aug-2016 at 10:44 PM.
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