6

With 2 meter FM and common 50 W base or mobile transmitter power and plain vertical quarter wave antenna, range over flat ground to a similar station is roughly twenty-five miles, or forty km (limited mainly by line of sight and horizon scatter). Raising the antenna will increase this, but not dramatically. Repeaters in my area that are roundly 1500 feet (~...


4

For VHF or UHF, your range is mostly going to be limited by terrain, like Zeiss Ikon writes. On flat terrain the radio horizon can be estimated by a simple formula, but that's not of much use if the terrain isn't flat. So, you can use a tool such as heywhatsthat to see what terrain is visible from where. If you have a clear line of sight over the path ...


4

I think the correct way to understand this is basically as "a dummy load which makes it easy to measure the voltage across itself". Likely as simple as: simulate this circuit – Schematic created using CircuitLab That is, for a feed-through terminator, the input port provides a characteristic impedance load assuming the output port is ...


2

If you have or can borrow a 100W dummy load and a wattmeter, you might want to check to see if the rig can transmit at its full rated power over the range of bands of interest, and without obvious overheating or smelling anything inside (aged caps?) burning. If you have a pocket HF receiver, you might also be able to check to see if the rig is transmitting ...


2

At 40 miles (65 km), assuming that terrain doesn't get in the way, you have a choice between HF and VHF/UHF. For HF the radios are expensive, maybe \$600 for a good used one, and a simple wire antenna and coax would cost about \$150. Several HF radio models also include VHF/UHF. The antenna could be strung up between two trees. You could talk to half the ...


2

This question was asked in the middle of the pandemic, where people were largely isolated from physical social events. I suspect that as a consequence of this, amateur radio activity increased to replace those missing social events (I know I did that for sure). Possibly as a consequence of that, demand for amateur radios increased, to the point where even ...


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