Fully aware a longer antenna would be a better choice and I have a Diamond RH-77 as well as many other antennas.you won't hear as much air traffic with the 800 MHZ antenna as you might with antenna that is better equipped to pick up air, such as the Diamond RH-77 or similar.
Yes, I am talking about a 436HP.I put my Pro-164 side by side with the same Air freq. The Pro had no problem.
I switched the 436 to the RS 800 MHz antenna same deal. I am not picking up any air communications
What is squelch 2? is that on the 436?
I keep forgetting about the Service Type's on these radios as well. Have been using my x96XT more often than the HP series radios.Do you have the proper "Service Type" enabled for the frequencies you are trying to monitor?