[Elecraft] K3 Sub Rx antenna input choices

[srife at swbell.net]

	I'm thinking of a relay at that point to switch between them. But
then I guess there goes your isolation afforded by the BNC.
Would a Y cable affect the input Z enough to affect the gain?


Stan Rife 
W5EWA 



-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Ken Kopp
Sent: Tuesday, December 29, 2009 3:05 PM
Cc: elecraft at mailman.qth.net
Subject: [Elecraft] K3 Sub Rx antenna input choices

I purchased my sub-receiver for one specific use ... to monitor
6M for band openings while the radio might tuned to another 
band.  I used the Elecraft-supplied BNC(F) to TMP(M) cable 
to feed the sub-receiver's input.  This arrangement is essentially
"permanent" unless one does a partial dis-assembly to gain
access the sub-receiver's input jack.

I later decided that I'd like more flexibility regarding the choice
of antenna for the sub-receiver.  I now route the cable from the
BNC(F) to the area atop the sub-receiver and secure it to the
knurled nut on the top of the sub-receiver.  I also routed the
cable from the antenna tuner to the same area and secured 
it along with the end of the cable from the rear panel BNC(F).

Next I made up a short (6") TMP(M) to TMP(F) cable that 
plugs -permanently- into the sub-receiver's input.  This short
cable is also routed to the same area as the ends of the other 
two cables.  Now, by lifting the top cover of the rig, I can choose 
which source is fed to the sub-receiver's input via the short
extension cable.

It's -much- easier to gain access to the sub-receiver's antenna
jack if the KI03 is removed.  It's easy to damage the input jack 
on the sub-receiver if you try to plug a cable into the jack from 
above.

73! Ken Kopp - K0PP
      ElecraftCovers at rfwave.net
      http://tinyurl.com/7lm3m5




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