Upconverter?

[Jim AB3CV]

I think I remember someone mentioning an upconverter to allow the K3 to
receive below 500Khz. No interest in transmitting but would like to listen.

Any links?

73

jim ab3cv
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[Matt Zilmer]

Try this: http://www.northcountryradio.com/Kitpages/lfconv.htm

73, Merry Christmas, and all the rest -

matt W6NIA

On Sat, 24 Dec 2011 19:00:22 -0500, you wrote:

>I think I remember someone mentioning an upconverter to allow the K3 to
>receive below 500Khz. No interest in transmitting but would like to listen.
>
>Any links?
>
>73
>
>jim ab3cv
>______________________________________________________________
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[k6dgw]

I have a Palomar VLF converter [10 - 500 KHz --> 3.510 - 4.0 MHz].  The
only thing I used to hear was the LORAN-C station over in Middletown
CA.  Now that LORAN-C is kaput, I hear a lot above 100 KHz, and some
strange sounds below that.  I think I might have heard the USN Jim Creek
station [16 KHz], they don't exactly identify often :-)  I think Palomar
is out of business, but you might find one, or something like it.  My
FT-847 goes well below 500 Kcs, but it is pretty deaf down there.

Merry Christmas and 73

Fred K6DGW
TDY in Sparks NV

On 12/25/2011 12:00 AM, Jim Miller wrote:
> I think I remember someone mentioning an upconverter to allow the K3 to
> receive below 500Khz. No interest in transmitting but would like to listen.
>

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[Jack Smith-6]

An inexpensive up-converter kit is available from Jackson Harbor Press.
http://wb9kzy.com/lfconv.htm

I've written an extensive review the converter at
http://www.cliftonlaboratories.com/jackson_harbor_press_vlf_converter.htm

Jack K8ZOA


On 12/24/2011 7:00 PM, Jim Miller wrote:

> I think I remember someone mentioning an upconverter to allow the K3 to
> receive below 500Khz. No interest in transmitting but would like to listen.
>
> Any links?
>
> 73
>
> jim ab3cv
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

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[riese-k3djc]

it all may depend on what you are interested in
if just a casual listener than the one from North Country Radio is good
]I built a good converter using a DBM from mini circuits and used a
clock osc for the LO,,, driving it at 4 Mhz It tunes nicely in and around
the 80 meter band
is very stable and works well for the QRSS modes using very slow CW
or pick up a used R75

Bob K3DJC
On Sat, 24 Dec 2011 19:00:22 -0500 Jim Miller <[hidden email]> writes:

> I think I remember someone mentioning an upconverter to allow the K3
> to
> receive below 500Khz. No interest in transmitting but would like to
> listen.
>
> Any links?
>
> 73
>
> jim ab3cv
> ______________________________________________________________
> 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
>
>

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[Edward R Cole]

http://www.kl7uw.com/600m.htm
scroll down the page half-way for the item marked March 17, 2011.

But mine is a downconverter for xmit.  But no reason it could not be
used for receive providing you place a good LF preamp ahead of the
mixer (minicircuits SBL-1).  In my case I am using my station 10-MHz
reference oscillator as LO and running the K3 in test-mode at
10.470-10.510 MHz with output at 470-510 KHz.  I LP fllter is needed
on the output of the mixer circuit.  I am using the downconverter to
drive my converted NDB transmitter (100w output for 0 dBm input).


73, Ed - KL7UW, WD2XSH/45
======================================
BP40IQ   500 KHz - 10-GHz   www.kl7uw.com
EME: 50-1.1kw?, 144-1.4kw, 432-QRT, 1296-?, 3400-?
DUBUS Magazine USA Rep [hidden email]
======================================

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[riese-k3djc]

they work great, dont they
how much L O drive ?
i understand DBM like a lot of drive
my rcv set up was a bit light for LO but have very good signal handling
ability
and I see no overload CDX using it
bob  k3djc
On Sun, 25 Dec 2011 17:01:53 -0900 "Edward R. Cole" <[hidden email]>
writes:

> http://www.kl7uw.com/600m.htm
> scroll down the page half-way for the item marked March 17, 2011.
>
> But mine is a downconverter for xmit.  But no reason it could not be
>
> used for receive providing you place a good LF preamp ahead of the
> mixer (minicircuits SBL-1).  In my case I am using my station 10-MHz
>
> reference oscillator as LO and running the K3 in test-mode at
> 10.470-10.510 MHz with output at 470-510 KHz.  I LP fllter is needed
>
> on the output of the mixer circuit.  I am using the downconverter to
>
> drive my converted NDB transmitter (100w output for 0 dBm input).
>
>
> 73, Ed - KL7UW, WD2XSH/45
> ======================================
> BP40IQ   500 KHz - 10-GHz   www.kl7uw.com
> EME: 50-1.1kw?, 144-1.4kw, 432-QRT, 1296-?, 3400-?
> DUBUS Magazine USA Rep [hidden email]
> ======================================
>
> ______________________________________________________________
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>
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> Please help support this email list: http://www.qsl.net/donate.html
>
>

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[Doug Faunt N6TQS [phone]]

Hi all,
Are the schematics for the P3 available anywhere?  I don't see them on
the Elecraft website.

73, doug

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