Here's an odd problem I don't recall seeing before in 30 odd years of various satellite setups. Just recently on certain frequencies/sats, with channels I already have successfully stored for several years (eg Astra 19E 10.876 V or Hotbird 13E 10.971 H), the signal strength and quality fluctuate wildly between 25 and 75 and consequently the channel cannot lock. Higher frequencies don't seem to show the same symptoms and I'm able to watch these channels OK. Suspecting lnb or cable problems, I connected another receiver and was able to tune the problem frequencies OK.

So, is it possible that a tuner component in the Spider is somehow partially dying or can someone offer a logical explanation? Thanks in advance to the Spider experts out there.