Today I want to show you a hidden trick with 2-VFO radios that completely changed how I listen and manage to pile-ups on HF. Most amateurs use dual VFOs for split operation – listening to the DX on one VFO and the callers on the other. But I accidentally discovered another use entirely.
By using two completely different antennas at the same time – for example a vertical on one VFO and a low dipole or delta loop on the other – you can create a kind of stereo image in your headphones. Longer-distance, low-angle DX may appear strongly in one ear, while more local stations arrive more strongly in the other.
On 40m and below this becomes fascinating.
In this video I demonstrate:
How I configure left/right audio
Why different antennas hear signals differently
How arrival angle affects reception
Why this helps untangle pile-ups
Why 2-VFO radios are far more useful than most people realise
Headphones recommended for this one!
73,
Callum M0MCX