[Elecraft] two k3's on the same band

[Rich - K1HTV]

Matt,
   We've used two K3's on 160 Meters driving a common 1500 Watt amplifier at
W3LPL in the CQ & ARRL DX contests for the past few years with no problems.
Frank has eight 500+ feet long Beverage antennas located a couple of hundred of
feet from the 4-Square antenna. On CW the K3 op listening for mults is able to
receive on most of the Beverages as close at 10 KHz from the transmit frequency.
The K3's are isolated from the Beverages by a band pass filter and preamp.
Antennas for the other HF bands, also fed with a KW, are even closer to the
Beverages and have no effect at all on the 160M K3 transceivers. About the only
thing that will blow the preamps is a lightning strike. 

At home with a barefoot K3 at 100 Watts, I feed 4 switched Beverage antennas to
the K3's sub-receiver using a common preamp. The antennas are as close as 50
feet with no sign of the overload relay clicking in.

73,
Rich - K1HTV

= = =

-----Original Message-----
From: Matt Murphy [mailto:matt at nq6n.com] 
Sent: Wednesday, March 21, 2012 15:24 PM
To: Elecraft Reflector
Subject: [Elecraft] two k3's on the same band

Just wondering if anyone has any experience using two K3's on the same band (for
example, one for running, one for mults in a multi-op single transmitter
scenario).  Is there any danger of damaging the receiver(s) by transmitting with
high power so close by (different antenna, same property).  Is there a
difference if the transmission is a few KHz away vs
(accidentally) on the same frequency?

Just curious what sorts of precautions (if any) ought to be taken and what
solutions exist (if necessary).

73,
Matt NQ6N