[Elecraft] New XG3 f/w includes CW beacon mode

[Edward R. Cole]

I am building some LP filters using 7-pole CoilCraft filters that I 
am installing in custom-made copper enclosures with 
BNC-male/BNC-female connectors.  After I make and test a couple, I 
might consider making some for sale if there is interest.  No idea on 
price, yet.

I bought an aluminum enclosure that will be used with the XG3 and 
uses a BNC-FF fedthru adaptor to shield the XG3 for use with 
attenuators for making receiver tests below -140 dBm.  It will run on 
battery to eliminate any sneak paths for RF leakage.

For QRSS modes one could use a transistor switch to key the 
output.  That is how I keyed the output of a DDS synthesizer on 
500-KHz for driving my 100w 600m xmtr.  Of course the K3 does all 
modes on 500-KHz at 0 dBm and that is what I currently use as driver.

73, Ed - KL7UW

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Message: 33
Date: Wed, 27 Apr 2011 15:57:20 -0700
From: "Eric Swartz - WA6HHQ, Elecraft" <eric at elecraft.com>
Subject: Re: [Elecraft] New XG3 f/w includes CW beacon mode
To: Bruce Beford <bruce.beford at myfairpoint.net>
Cc: elecraft at mailman.qth.net
Message-ID: <4DB89F50.3050204 at elecraft.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

At 1 mW or less on its operating frequency, this is unlikely to cause
any problems. The 2nd harmonic and higher order even harmonics are over
30 dB down from that, and the odd harmonics are 7-10 dB down. It
certainly shouldn't cause any issues at VHF.

That said, you can always add a simple in-line LPF to roll off the
harmonics the additional amount desired.

73, Eric




73, Ed - KL7UW, WD2XSH/45
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