Re: [Elecraft] Elecraft Digest, Vol 236, Issue 2

[Jim Brown]

On 12/3/2023 9:23 AM, Bob McGraw wrote:
Jim, K9YC, has very strong merits in that each and every piece of 
equipment MUST be bonded to a single common point.   I use the station 
power supply for my single common bonding  point.  I DO NOT use an 
external dedicated ground as it would be 35 ft in length and serve as an 
antenna to pick up noise.  After all, that is 1/4 wavelength on 40M.


Yes, but that's a VERY oversimplistic description. Study N0AX's ARRL 
book on the topic, to which I contributed, and/or this pdf of slides for 
a talk I've done at Visalia, Pacificon, and to various large clubs.


http://k9yc.com/GroundingAndAudio.pdf

The VERY short answer is that everything that's connected to the rig 
must be bonded together by short fat copper AT the operating desk. That 
common point must be bonded to every other ground in our home, also by 
the shortest practical fat copper. In the shack, I mostly use #10 
stranded; outside, I use #6 stranded.


73, Jim K9YC
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Re: [Elecraft] Elecraft Digest, Vol 236, Issue 2

[Bob McGraw]

There are many very nice, well filtered, well regulated power supplies 
on the market.  I see NO REASON for using anything other than the 
station power supply to power all accessories.    As to plant lights, 
use a separate power supply and not the piece of junk supplied with them.


I have and use two switch mode supplies for all of my station 
equipment.  That encompasses two 100 watt transceivers an a 150 watt VHF 
amp.   From 160M - 2M I have ZERO noise from either or from both of 
these supplies.   Frequently I am running two radios on 2 different 
bands at the same time.


Jim, K9YC, has very strong merits in that each and every piece of 
equipment MUST be bonded to a single common point.   I use the station 
power supply for my single common bonding  point.  I DO NOT use an 
external dedicated ground as it would be 35 ft in length and serve as an 
antenna to pick up noise.  After all, that is 1/4 wavelength on 40M.


As to what's in the neighborhood, that's another issue out of my control.

73

Bob, K4TAX

On 12/3/2023 9:52 AM, elecraft-requ...@mailman.qth.net wrote:

Message: 14
Date: Sun, 3 Dec 2023 05:19:39 +
From: Bill Johnson
To:"j...@audiosystemsgroup.com"  ,
"elecraft@mailman.qth.net"  
Subject: Re: [Elecraft] Noise from KAT500?
Message-ID:



Content-Type: text/plain; charset="us-ascii"

It gets worse with all the new gadgets and LED lighting.  I just
installed new plant lights, LEDs, and the racket from the wall warts is
terrible.  I shut them off when operating, or not interested in lighting
  up the plants.  Terrible view of the noise on K4 graphic display.

Bill
K9YEQ

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