Re: [IRCA] Another WWXL 1450 DX test

[Chuck Hutton <charlesh3@xxxxxxx>]

The lowest frequency was always chosen to be 1.6 or 2 MHZ in the past, as the plethora of interference from AM stations makes it difficult to dig out the needle of returned signal in the haystack of babble. I have seen occasional sets of data going lower (1 MHZ) but cant remember if it was daytime or not.
 
Chuck
 
> Date: Sun, 16 Mar 2014 21:09:02 -0400
> From: bm@xxxxxxxxxxxxxxxx
> To: irca@xxxxxxxxxxxxxxxx
> Subject: Re: [IRCA] Another WWXL 1450 DX test
> 
> On 03/16/2014 02:50 PM, Walter Salmaniw wrote:
> > It's easy to hear sweeps.  I often wonder whether they are ionosones.  We
> > sure see them frequently on the Perseus waterfall on SW.
> 
> An interesting thought, Walt.  I believe swept-frequency ionosondes (aka 
> chirpsounders) typically don't go below 2 MHz, but no doubt there are 
> exceptions.  If you did hear one zip through an AM broadcast channel 
> (and I think I've heard a few myself), it would be a single, isolated 
> sweep, and it wouldn't be repeated for at least 15 minutes or so.  In 
> contrast, if sweeps are used as part of a DX test, they should be 
> repeated quite rapidly, and the difference should be quite obvious to 
> the ear.
> 
> Barry
> 
> -- 
> Barry McLarnon  Ottawa, ON
> 
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