Update on HF-10
I saw an issue with the antenna and it came down to the 4:1 Balun which suffered water ingress and a poor joint when I got it dismantled from it's glued case.
I had obtained a replacement HF-10 and changed it out because of age and finding the SWR would increase over a TX period of time and return to normal later on. This was due to Balun heating effect.
My replacement antenna HF-10 again worked well and good SWR across the bands.
Pictures of the original Balun showing the soldered connections and the way the ferrite core is fixed in place which can slip out of the cable tie holding it.
Further work I found the replacement antenna suffered the same Balun heating!
So I purchased a replacement Balun rated at 500W from Mirfield Electronics in Bingley and the results have been good with no issues seen so far.
I know several members of the club may still be using a Western HF-10 and this resolves the issues I saw.
Min G0JMS
May 2021