[Boatanchors] FS: FT243 7160 kHz AM band Crystals

[Radios R. Me]

That is vastly different from my experience.  I have had many many contacts on 
10m AM.

Most of them on 7250 kHz - I will agree, but when the band is open, you often 
hear guys on 

29.020, 29.040, 29.050 MHz etc.  The band is often open when people do not 
realize it.

With the summer Es season now in swing, it is not at all uncommon during the 
daytime
out to 500 or even 1000 miles.  These are sometimes brief openings, but you 
never
know when it will pop open for 30 minutes or so. 

There are some specialty 10m discussion groups on yahoo groups, and from the 
reports 

on there,  and my own listening, I know that the Es propagation mode is far from 
being a thing 

of the past.

  

FOR FASTER RESPONSE, Please use my main e-mail 
address:   af4k at hotmail.com

73 - Brian "Bry" Carling, AF4K






________________________________
From: Drew P. <drewrailleur807 at yahoo.com>
To: boatanchors at mailman.qth.net
Sent: Sun, July 25, 2010 5:05:39 PM
Subject: Re: [Boatanchors] FS: FT243 7160 kHz AM band Crystals


On his selection of 40 meter crystals for sale, "Bry" remarked:

(snipped)

"Some of these will make great multipliers onto 10m AM also..."

In my opinion, only one of those frequencies would make a great multiplier onto 
10m AM:  7250.

Back when 10 was open, I had a crystal on 14.400 which I used in my 
Hallicrafters HT-9 to get on 10 meters, 28.800 Mhz.  I could sit there all day 
and call CQ and never get a response.  The radio had good power output.  The 
antenna was reasonably good.  I then dug out an old Knight VFO, and made up a 
doubler circuit with a 6AU6 in a small aluminum box.  This plugged right into 
one of the plug-in modules in the HT-9, and a piece of coax brought in the 
Knight VFO's 40 meter signal.  I made many good contacts both local and DX on 
29.000 with the VFO-doubler-HT-9 setup.  But when I'd for the heck of it try 
28.800 either with VFO or the crystal, no response whatsoever.

I fiured it wasn't the MUF, as there was plenty of DX activity down lower in the 
band.  It must have been mode-selective propagation; AM signals simply do not 
get out on 28.800 (snicker).

And now it is all completely moot, as sunspots have become a thing of the past, 
or so some reports say.

Drew



      
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