Topband: K9AY Switching box

[Josep]

Hi all,

I have recently noted a degradation in the signals arrived to my K9AY loops. In fact, signals are better on my 25m top-loaded-vertical rather than the loops.. I have checked SWR at the base of the ant and it´s very reasonable, 1.2:1 and some 40 ohm. Measured inside the shack, and directly to MFJ-259, remains the same, but things change when i measure it through the switching relay box, SWR goes up 2.5:1..! I have leaved the coax connected directly to the rig, instead of connecting it to the relay box, but can switch loops anyway. Advantage of connecting it to relay box, is to get the Preamp working I guess...So, later today or tomorrow morning I will try how it works this way. What could be the reason of that increment in SWR when coax goes thru relay box..? Something has blown  inside..? Is there anyway to check the box..?

Thanks for help..

Josep
EA6BF