I've never used a dummy load before so trying to understand if I've had successful build or not... I made a low power dummy load using 2 100Ohm resistors in parallel, each rated for 100W. Housed inside an aluminum case typically used for guitar pedals. Multimeter reads 50.1 Ohms. On VHF FM I put 5W then 10W into it, SWR meter shows ~2.3. On HF (40m & 20m) SWR is fairly flat around 1-1.5 as I speak into the mic, but occasionally seems to "blip" up to 3 but comes down. Is this the way a dummy load behaves, or should it be dead on 1:1 at all frequencies?