Article: "Exploring the World Below 530 Kcs With a K3"

[wayne burdick]

Fred, K6DGW, has written a short article describing some of what you might find below the AM radio band using the K3 with a KSYN3A installed (or any other radio with such coverage). You'll find it here:

   http://www.elecraft.com/manual/Below%20AM%20Broadcast.pdf

73,
Wayne
N6KR

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[Joe Subich, W4TV-4]

Wayne,

With the recent FCC announcement concerning the potential for a
sliver band at 137 KHz, would converting the .500 - 2.00 MHz BPF
in the KBPF3 to a LPF provide enough improvement in sensitivity
to make 137 KHz usable?  Might adding 500 - 1000 pF to C6 improve
the situation below 500 KHz (I don't suspect a slight loss of
sensitivity at the high end of the broadcast band would be a great
problem since one tends to run the attenuator there anyway).

73,

    ... Joe, W4TV


On 2015-04-29 11:50 AM, Wayne Burdick wrote:
> Fred, K6DGW, has written a short article describing some of what you
 > might find below the AM radio band using the K3 with a KSYN3A
 > installed (or any other radio with such coverage). You'll find
 > it here:

>
>     http://www.elecraft.com/manual/Below%20AM%20Broadcast.pdf
>
> 73,
> Wayne
> N6KR
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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>
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> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
>

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[wayne burdick]

Hi Joe,

Great minds and all that :)  I did find a way to alter the .5-2.0 MHz filter so that it extends coverage down to 100 kHz at low loss. Very simple mod, which I will explain to those who volunteered, hopefully tomorrow.

This will be a receive-only range for the K3, even with the mods.

73,
Wayne
N6KR


On Apr 29, 2015, at 10:54 AM, "'Joe Subich, W4TV' [hidden email] [Elecraft_K3]" <[hidden email]> wrote:

>
> Wayne,
>
> With the recent FCC announcement concerning the potential for a
> sliver band at 137 KHz, would converting the .500 - 2.00 MHz BPF
> in the KBPF3 to a LPF provide enough improvement in sensitivity
> to make 137 KHz usable? Might adding 500 - 1000 pF to C6 improve
> the situation below 500 KHz (I don't suspect a slight loss of
> sensitivity at the high end of the broadcast band would be a great
> problem since one tends to run the attenuator there anyway).
>
> 73,
>
> ... Joe, W4TV
>
> On 2015-04-29 11:50 AM, Wayne Burdick wrote:
> > Fred, K6DGW, has written a short article describing some of what you
> > might find below the AM radio band using the K3 with a KSYN3A
> > installed (or any other radio with such coverage). You'll find
> > it here:
> >
> > http://www.elecraft.com/manual/Below%20AM%20Broadcast.pdf
> >
> > 73,
> > Wayne
> > N6KR
> >
> > __________________________________________________________
> > Elecraft mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:[hidden email]
> >
> > This list hosted by: http://www.qsl.net
> > Please help support this email list: http://www.qsl.net/donate.html
> > Message delivered to [hidden email]
> >
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