[Elecraft] 472KHz transverter for KX3

[Edward R Cole]

Graham,

Congratulations.  Looks like a nice design.  Are you using a TUH-1 
mixer?  Looks like the one that is used in DEMI transverters.  Also 
does not look difficult to put on 10.472 MHz using an external 10-MHz 
reference osc.  This would be ideal running the K3 in TEST mode.

I don't see LP filters on the output.  Might be good to have that so 
the 2nd Harmonic does not cause BC RFI on 944-KHz.

If you are going into production, probably not much sense for me to 
try, too.  The market belongs to he who is first.  I would add a 25w 
PA for running 1w ERP (typically with short vertical antennas).  I 
get a calculated 4.15w ERP on my inverted-L by running 100w RF output.

At my station I could drive my 100w transmitter with the SGA5586 
stage, or possibly directly with the mixer output.  I currently run 
on 495-510 KHz using the mw output of the K3 running in TEST.

73, Ed - KL7UW

--------------
Date: Mon, 25 Mar 2013 14:52:57 -0700 (PDT)
From: grumss <grumss at yahoo.com.au>
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] 472KHz transverter for KX3
Message-ID: <1364248377705-7571853.post at n2.nabble.com>
Content-Type: text/plain; charset=us-ascii

Prices are yet to be confirmed,
the kits should be around AUS$80 and


fully built boards AUS$200
It may seem a little expensive but I hand built them, tune and test which
takes a few hours.

(a limited number of fully built ones are available already at this price)

73, Graham VK3XDK