[aprssig] HF Gateway Stations

[John Habbinga]

> It shows about 123 HF gates right now.  But this is based on the
> use of the HF-GATE symbol, not on whether these gates are
> actually on HF.

I went through each station that was located in the United States.  It 
appears that most of them are VHF I-Gates.  I was only able to verify that 4 
are definitely receiving HF.  Judging from software versions, path settings 
and comments, I'd guess that the majority aren't even Internet gateways of 
any type.

I was considering putting an I-Gate for APRS on 30-meters, but I don't know 
how much demand there really is for one.