March 17, 2016
Expanding your RF test bench to UHF
The UHF testing issues with the test bench above were in the SWR meter and dummy load. The SWR meter was only good to VHF, and the dummy load, a Heathkit Cantenna, tops out at 400 MHz. (We need a top end of about 470 MHz.) Those two items need to be upgraded.
Here are two UHF-rated dummy loads and a VHF/UHF power-SWR meter. Two of the three are amateur radio test gear, and would enable you to upgrade your test bench to UHF for a reasonable amount of money.
A QRP dummy load once sold by radio shack. Another discontinued item, but equivalents are available. The Diamond DL30A is the closest one to this. The DL30A is actually rated 15 watts continuous, and 100 watts peak (for 2 seconds). If you're going to be testing mobile radios on a regular basis, you'll probably want a heavier dummy load.
A lot of gently used test equipment shows up at hamfests. If you are on a budget, that would be your best bet.