[Elecraft] K3 Sub-receiver use

[Edward R Cole]

Like Roger, W3SZ, I will use my sub Rx on 2m eme with a 
transverter.  Instead of the LP-Pan I will connect my SDR-IQ to the 
IF output for obtaining a panoramic display of up to 190-KHz of a 
band.  This will be centered on the K3 IF frequency and track with it 
as I tune the K3.

But I purchased the sub Rx option so that I could receive 2m from a 
second set of antennas that were polarized opposite the main 
Rx.  This has some advantages in 2m eme which I will not go into.

I do not recall the exact way you wanted to monitor 6m, but could you 
not do this with the main Rx plus P3 and use the sub Rx for the other 
band you wish to use?  I haven't explored doing this, but can one 
transmit on a different band than one receives using the main 
Rx?  Can one transmit and receive using the sub Rx?  The main problem 
with this idea might be in antenna selection (but does not the 
antenna tuner allow for auto switching between Tx and Rx?  I did not 
opt for the tuner so not enough familiar how it can be configured.

In any case, it seems a shame to give up on your idea just be cause 
the radio is not equipped from the factory.  The mod Roger uses does 
not appear to be that difficult, even if one has the find a fellow 
ham to help with the actual conversion.

(But then I do lots of home construction)

73, Ed - KL7UW

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Message: 18
Date: Tue, 25 May 2010 18:48:20 -0700
From: Alan Bloom <alan at elecraft.com>
Subject: Re: [Elecraft] K3 Sub-receiver use
To: hb9ari <hb9ari at bluewin.ch>
Cc: Elecraft-forum <Elecraft at mailman.qth.net>
Message-ID: <1274838500.1492.43.camel at ulinux-desktop>
Content-Type: text/plain; charset="UTF-8"

Hi Rudolf,

At the bottom of this message I will copy a posting from W3SZ on the
LP-PAN email list that describes how he added IF output to his K3
sub-receiver.  He used the Z10000 buffer amp from Clifton Labs:
http://www.cliftonlaboratories.com/z10000_buffer_amp.htm

If you don't mind modifying your K3, it looks like that should allow you
to use the sub-receiver with a P3.  When I get time I'll have to try it
on my K3 and see how it works.

Alan N1AL

On Tue, 2010-05-25 at 22:01 +0200, hb9ari wrote:
 > Hi Rich,
 >
 > Very bad news !
 >
 > That was my 1st idea when ordering the P3
 > to use it for "wide" span use for phone mode.
  ...snip...
 >
 > Just in time to stop for the KRX3 ordering but for the P3...
 > may be eBay ?
 >
 > My best 73,
 > Rudolf, HB9ARI
----snipped the attachment-----


73, Ed - KL7UW, WD2XSH/45
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BP40IQ   500 KHz - 10-GHz   www.kl7uw.com
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