Thread: TV antenna masthead amplifier choice - 24dB or 32dB?

Originally Posted by p38arover

Scouse tells me one antenna (both are UHF) is connected to the UHF input and the other to the VHF input of the present amp. I suspect the UHF antenna on the VHF input isn't getting much signal through.

I suspect that you're right on the money. It would be a miracle if it got anything useful through at all.

If you can find a dual input UHF / UHF masthead amp all well and good, or you may install a diplexer before a single input UHF masthead amp to achieve the same end. Either way it's getting a bit more complicated than your average install, professional or learned input is required for a good outcome.

Be very careful if one or more stations are transmitting on the same frequency (same channel) from both towers. Shouldn't happen with adjacent towers but I don't know the area. If this is the case then you definitely need professional help. (Kaye's been telling me this for years ).

Deano

I'm even further away!

If there is a poor ( say a 15 dBuV or less ) VHF signal present, it is a toss up whether the benefit of using a band stop filter for VHF, to minimise background noise outweighs the insertion loss ( -1 dB ) for the UHF signal.

Aerial design in this instance is important, look for narrow acceptance angle and high rear signal rejection, excessive gain can be controlled by adding a attenuator, which then can be reduced as more outlets are added.

Are both UHF signal sources the same polarity ?
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