Thanks! I have a type 31 toroid on the Ethernet cable at the shack end,
with 11 turns of the unshielded Ethernet cable wound on it.
73, Pete N4ZR
On 3/13/2024 10:43 AM, Bayard Coolidge, N1HO wrote:
Although I don't have an amp, and ran my K3 barefoot, and run my K4D
barefoot as well, I do have a 100 foot CAT5E cable running into the
shack from the other end of the house, through the attic (there being
no basement here in south Florida!). Initially, I was seeing a fair
amount of noise from it, and was able to quench it by winding a couple
of turns around a small clamp-on choke.
That doesn't seem to affect the network performance, so I can reliably
run it at 400MBit/second, and it seems to clean up whatever other
noise it's picking up from nearby homes (most are on small lots of
about 1/5 acre) and the condominium complex next door. I still have
some strange noise from other sources coming in from the antenna, and
the HVAC's air handler is very noisy, particularly on 30m through 15m,
but I know it's not the twisted-pair Ethernet line. My CAT5E cable
plugs into a small AC-powered router, and feeds my Mac, the K4D, as
well as a laptop occasionally.
HTH, and 73,
Brandy, N1HO (EL96xh)
On Wednesday, March 13, 2024 at 10:22:02 AM EDT, Pete Smith N4ZR
<pete.n...@gmail.com> wrote:
One culprit I can think of is a 100-foot Ethernet cable between my
station and my FIOS router. I have bought a shielded replacement but
have not yet installed it. After reading some of the recent commentary
about so-called "shielded" cables, I'm wondering if this is worth doing.
Any suggestions, either K-3-specific or more general, would be much
appreciated.
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