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Old 6-Apr-2019, 1:04 AM   #7
Retired A/V Tech
Join Date: Aug 2012
Location: S.E. VA
Posts: 2,550
Originally Posted by Johnsonbrits View Post
I've seen the Winegard video regarding a possible failed antenna combiner cartridge. In fact, the method recommended by Rabbit73 to test whether the cartridge is faulty or not by removing the cartridge and connecting a 300 ohm to 75 ohm impedance transformer directly to the VHF antenna rails is the primary reason why I question the approx 2 ohm reading I get across the VHF rails with my multimeter.
Did you actually try to receive 3 and 7 with the balun attached to the VHF wires?

If you did, and 7 was better than 3, you can try a channel 3 folded dipole as an antenna for 3.

If you still can't receive 3, either they are running at reduced power or you have a high noise level on VHF-Low from electrical interference. I use a portable radio tuned to a vacant channel on the AM broadcast band, first the low end then the high end, to hunt for noise sources.

If you can not measure it, you can not improve it.
Lord Kelvin, 1883

Last edited by rabbit73; 6-Apr-2019 at 1:19 AM.
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