Transmission1

Hey all

Getting back into aeronautical HF to see what's going on. No decent antenna due to being in an apartment, so I'm settling on getting what I can from Shanwick. Can't reach Iceland even, but maybe propagation is just terrible.

Findings:

The only frequency I get any success on is 4651... which I didn't even know was a busy frequency and just stumbled on it.

Times it works: very early morning and late evening. Very strong signal 10pm ish.

Hear all the westbound freighters which check in at 20 degrees west for SELCAL check. Weirdly don't seem to hear anything flying Eastbound.

Anyone know what frequency eastbound ones would be on? Or do they just check in at 30 degrees and I can't hear them? Seems odd.

Anyway so far it's better than expected but literally limited to a single frequency.

I'll have to have a listen sometime sounds interesting.

I will record a couple of clips and add them here.

It is interesting yes, but a dying hobby overall I would guess.

I am coming back to it 20 years on so am out of touch with a lot of it now, could do with finding some answers to a few questions!

i believe 4.651MHz is Shannon Volmet.

No it's not! That's 5505khz.

I believe some frequencies are duplicated..

Mike

????

Shannon Volmet do duplicate there frequencies. They can be broadcasting on three different frequencies throughout the HF bands. They are also on VHF Air Band on two different frequencies.

Any aviation HF airband specialists out there I can tap into?

The CAA radio manual is here. It might be a useful read for the airband enthusiast.