My amateur radio operations has been spoilt by a very noisy PSU. This raised the noise floor by several S points.
I have tried to fit ferrites to the lead with limited success. I also couldn't find a large enough one for the mains lead. However, I suddenly realised I could strip the outer back and therefore wind several turns on two ferrites. This reduced the noise down to below one S point.
I must point out this should only be done by someone who understands the risk.
For many years I have had my 2/70cm beam located on a mast attached to my shed. This was not ideal as it was actually pulling the side off the shed. For ages I have be meaning to mount a base stub mast and attached the main mast to it.
Finally with a few days off the job is done. I dug a hole around 2 feet down and 18in wide, drove the stub mast a further foot down and filled the hole with Postcrete. I did of course make sure it was true, using a spirit level.
The results are shown below.
