[Elecraft] [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

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Message: 34
Date: Thu, 17 Mar 2011 21:48:31 -0700
From: Matt Zilmer <mzilmer at verizon.net>
Subject: Re: [Elecraft] [Elecraft_K3] KR3 SW Receiver.
To: Ken Alexander <k.alexander at rogers.com>
Cc: elecraft at mailman.qth.net, Elecraft_K3 at yahoogroups.com
Message-ID: <q3o5o6hj8cnup6j0v4gpqcqa1gorc9khef at 4ax.com>
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
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