Won't hurt to use a twisted pair cable between the PS and the rig. If
you have the standard DC power cable zip cord just unplug it, twist it
up real good, then plug it back in.
73,
Drew
AF2Z
On 07/16/16 00:12, Vic Rosenthal wrote:
You can tell if the noise floor increase is due to increased gain by seeing if
signals increase in strength along with the noise.
As Don said, OCFs are prone to common mode issues. Perhaps the power supply is
acting as a ground return for the 'common mode antenna'? A common mode choke on
the power leads as you suggest might be worth a try.
Regarding clip-ons, remember that at HF you need multiple turns to have a
noticeable affect. Also make sure they are the correct types of ferrite. The
K9YC paper deals with that.
Vic 4X6GP
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