[Elecraft_K3] KR3 SW Receiver

[Edward R Cole]

The simple SBL-1 mixer can already do that.  I'm not sure how low in
freq. it would work, but 20-KHz seems reasonable.  Just tune the K3
at F to F-480 with an LO = F-500 KHz

Using an LO = 3-MHz the 80m band could be translated (mixed) down to
0-500 KHz (with some limitations near the bottom end).
The mixer would likely need a preamp ahead of it and probably a good
tunable preselector (tunable filtering).

No firmware needed to do this.

For full transceiver operation just add a second mixer for the
transmit path to the KVX-3.  The full G3XBM transverter will provide
5-8w output:
http://sites.google.com/site/g3xbmqrp/Home/136k

I think the part of the discussion is: "if someone started working on
a receive converter for 20 to 500 KHz".  You can do it yourself.  But
if this is saying: "I wish someone would make me something", then are
there enough buyers to make such an effort worthwhile?

Lets say I can build this and sell it for $250.  I invest $5,000 to
make up 20 of them.  How long till I make back my investment?  This
is so simple why would anyone buy one from me?

73, Ed - KL7UW

------------------------------

Message: 34
Date: Thu, 17 Mar 2011 21:48:31 -0700
From: Matt Zilmer <[hidden email]>
Subject: Re: [Elecraft] [Elecraft_K3] KR3 SW Receiver.
To: Ken Alexander <[hidden email]>
Cc: [hidden email], [hidden email]
Message-ID: <[hidden email]>
Content-Type: text/plain; charset=ISO-8859-1

Maybe if someone started working on a receive converter for 20 to 500
KHz, with TX ability on 470 to 500, the firmware would come for it?
Could test it with any IF on which the K3 can receive.  The K3 can
already be operated as a transverter IF at 1 mW for the 500 KHz range,
albeit with a few restrictions.

Too bad I don't have the time here. ....  But a lot of Elecraft
projects get started because someone from outside the company thought
them up.  If there is enough pent up demand, somebody will work on
this.

The K3 would make a !great! SWL receiver, but it isn't very well known
outside the amateur community (my guess).

73,
matt W6NIA





73, Ed - KL7UW, WD2XSH/45
======================================
BP40IQ   500 KHz - 10-GHz   www.kl7uw.com
EME: 144-1.4kw, 432-100w, 1296-testing*, 3400-winter?
DUBUS Magazine USA Rep [hidden email]
======================================
______________________________________________________________
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

[Matt Zilmer]

Thanks for a good answer, Ed.  No, I was not asking for someone to
design and market a 20 - 500 KHz transverter (for me).  I would rather
do it myself, but lack the time at present.

Will look at the link you posted.  

Thanks and 73,
matt W6NIA

On Fri, 18 Mar 2011 08:21:08 -0800, you wrote:

>The simple SBL-1 mixer can already do that.  I'm not sure how low in
>freq. it would work, but 20-KHz seems reasonable.  Just tune the K3
>at F to F-480 with an LO = F-500 KHz
>
>Using an LO = 3-MHz the 80m band could be translated (mixed) down to
>0-500 KHz (with some limitations near the bottom end).
>The mixer would likely need a preamp ahead of it and probably a good
>tunable preselector (tunable filtering).
>
>No firmware needed to do this.
>
>For full transceiver operation just add a second mixer for the
>transmit path to the KVX-3.  The full G3XBM transverter will provide
>5-8w output:
>http://sites.google.com/site/g3xbmqrp/Home/136k
>
>I think the part of the discussion is: "if someone started working on
>a receive converter for 20 to 500 KHz".  You can do it yourself.  But
>if this is saying: "I wish someone would make me something", then are
>there enough buyers to make such an effort worthwhile?
>
>Lets say I can build this and sell it for $250.  I invest $5,000 to
>make up 20 of them.  How long till I make back my investment?  This
>is so simple why would anyone buy one from me?
>
>73, Ed - KL7UW
>
>------------------------------
>
>Message: 34
>Date: Thu, 17 Mar 2011 21:48:31 -0700
>From: Matt Zilmer <[hidden email]>
>Subject: Re: [Elecraft] [Elecraft_K3] KR3 SW Receiver.
>To: Ken Alexander <[hidden email]>
>Cc: [hidden email], [hidden email]
>Message-ID: <[hidden email]>
>Content-Type: text/plain; charset=ISO-8859-1
>
>Maybe if someone started working on a receive converter for 20 to 500
>KHz, with TX ability on 470 to 500, the firmware would come for it?
>Could test it with any IF on which the K3 can receive.  The K3 can
>already be operated as a transverter IF at 1 mW for the 500 KHz range,
>albeit with a few restrictions.
>
>Too bad I don't have the time here. ....  But a lot of Elecraft
>projects get started because someone from outside the company thought
>them up.  If there is enough pent up demand, somebody will work on
>this.
>
>The K3 would make a !great! SWL receiver, but it isn't very well known
>outside the amateur community (my guess).
>
>73,
>matt W6NIA
>
>
>
>
>
>73, Ed - KL7UW, WD2XSH/45
>======================================
>BP40IQ   500 KHz - 10-GHz   www.kl7uw.com
>EME: 144-1.4kw, 432-100w, 1296-testing*, 3400-winter?
>DUBUS Magazine USA Rep [hidden email]
>======================================
>______________________________________________________________
>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

______________________________________________________________
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