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Questions tagged [dx]

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2
votes
1answer
101 views

MW AM reception improvements?

Most AM receivers use Envelope detection. Historically this was simple. PLL-based systems are slightly better at low carrier-to-noise levels. Would there be any SNR advantage if each sideband was ...
1
vote
1answer
76 views

Mobile Phone offline maindenhead or mgrs web app [closed]

I read an article in a magazine or online about a (.gov, I think) site which showed two, four to six character sequences in a mobile phone browser window. The letters from left to right indicated ...
5
votes
4answers
3k views

What is propagation like when there are no sunspots?

Am considering getting my license again after raising kids, and wondering if there is any point in HF operation besides local chats — that is, what is propagation like when there are no sunspots?
7
votes
1answer
191 views

Is calling the Palmer Station (Antarctica) via IRLP without prior arrangements acceptable practice?

Until I can get an HF rig, I've been using my HT through a local repeater IRLP node. I've successfully made a few contacts doing that, but I recently noticed that Palmer Station in Antartica has an ...
4
votes
1answer
265 views

2 m meteor scatter FM voice freq?

What frequency should I use to try and make meteor scatter contacts on 2m FM tonight, with a nice meteor storm coming?
8
votes
5answers
1k views

What is the definition of DX?

I always believed that DX meant out of one’s own country, and in the continental US that can be pretty far. However, tooling around on the bands I’ll often hear people calling DX inside the US receive ...
6
votes
2answers
662 views

Why do some DX listen on a different frequency than they transmit on?

I've heard some DX indicate "CQ up 5" for instance, indicating that they are listening on a different frequency than they are transmitting on. What are the reasons one might want to do that?