Why?
Why? You really think that is going to make a difference?
Why?
Ah yes, the classic mark of an ignorant serial bodger...
Do you not understand the concept of 100% ?
It isn't too early to report mine. But I'd probably get a nasty-gram from Brian.
Well, the answers are:
Ancient aerial (the clue was "came out the Ark"), with unshielded coax and an unshielded UHF faceplate; impulse interference seems to be too readily picked up via the old aerial. So a new one was fitted, in the loft (I'm not about to do roof-top installs), with modern foil shielding coax and fed directly to the back of the HDR T2. Impulse interference was reduced, but still noticeable. I think it must be coming from a neighbour's gas boiler thermostat. So working on the premise of "Signal to Noise Ratio", whereby sufficient signal strength might overcome the impulse noise, I fitted the booster box (No line of sight of transmitter from loft height, neighbours' roof-tops are slightly higher, a hill is also in the way.) Incidentally, the X-Beam loft aerial was previously employed to satisfactory effect at a previous location, in the loft, with only the tiled roof to penetrate; transmitter was visible on the horizon beyond roof tiles.
My Panasonic washing machine had an "out of range" error occur on the water-level sensor, apparently cured by removing and reseating the offending connector plug. And I seem to remember similar reseating advice given for Thomson DHD4000 and other PVRs. Have you never heard of oxidation?
Besides, any excessive signal can easily be attenuated later, by means of a variable attenuator, if required.
I was toying with the idea of fitting a log-periodic aerial; apparently they have superior impulse-rejection performance. What are your thoughts?
And again, the black screen on playback occurred when one tuner was recording, and also when both were recording.