Hello OMs,
I plan to build a K9AY antenna.My question is about location of its
preamplifier.I consider locating it inside the control box at the base of the
antenna.Does it have any advantage/disadvantage? I am concerned about signal
strength loss in coax between antenna and radio if amplifier
Unless you are in some incredibly-low-atmospheric-noise location, the rig's
preamplifier will be enough for a K9AY loop.
It is important to use good coax with intact shield. I was helping a friend
of mine with his K9AY and his old coax was leaking in more signal than the
antenna was picking up.
Hi Tom,
I used a K9AY loop in my small back yard in Houston. I rarely ever found the
need for a preamp BUT I used an old Ameco PT-3 preamp inside the shack. That
did just fine for me.
73, Mike WA5POK
On Thursday, November 5, 2020, 05:09:53 AM EST, Wojciech Tomczyk via
Topband wrote:
Tom,
I use the DX Engineering DXE-RG5000HD receiver guard and DX Engineering
DXE-RPA-2 receive preamplifier ahead of my FTDX101MP. They are both
located in my shack. I changed from the internal K9AY preamp for better
use on 60m. I can tell a difference if I turn the preamp off. I don't
On 11/5/2020 10:02 AM, Joe Galicic wrote:
More importantly chokes should be used on the coax near the antenna and probably before it enters your house.
Yes.
I used 6 or 7 turns of feed line coax around a stack of 5 large FT-240
mix 31 cores.
There's a far better solution. It's also a lot
The preamp in my K3 and Flex 6600M was plenty for my K9AY loop. More
importantly chokes should be used on the coax near the antenna and probably
before it enters your house. I used 6 or 7 turns of feed line coax around a
stack of 5 large FT-240 mix 31 cores. Also, I keep the control line
I just finished installing a two element vertical array on 40M. The
instructions say to bond the radials from one vertical where they intersect
with a radial for the other vertical.
My question is, is this really necessary and what effect would doing so (or
not) have on the performance of
Hi Bob,
While bonding the radials is desirable, its not essential. But you
must NOT cross the radials over each other.
The radials of a multi-element vertical array are usually bonded to
a common wire bisecting the verticals where they would otherwise
cross over each other. See this
