In reply to mike123, and everyone else:
Well, so far so good. I've mastered Audacity sufficiently to have listened to a newly-ripped digital version of an album I haven't listened to in years and it sounds ok. Better than ok, it sounded good. Not perfect, but I wasn't expecting it to be, and not beyond improvement: I'm going to try ripping it again with the recording levels a little higher as I was perhaps a bit too cautious first time.
As expected, clean vinyl helped. When I get to some of the recordings that sound as though they've been made in a crisp factory, I may decide that the work involved is for a very rainy day indeed. I'm finding that removing pops and crackles to the satisfaction of my ears is quite a long process. The 'silence finder' plug-in has helped a great deal and saved me lots of time and bother, top tip that (and not the only one, thank you all again).
So, onwards and upwards. Another rainy day forecast tomorrow, guess what I'll be doing . . .
The technical stuff, for those interested: the turntable is a Pink Triangle PT One with a custom power supply, a Linn Ittok LVII arm and a Goldring 1042 moving magnet cartridge, being fed into a laptop via a Rega Fono mini A2D phono stage. It does pick up the detail, unwanted noises included, and if I think the vinyl needs a clean I find playing it and cleaning the stylus is the best way, so some albums are being played twice, once to clean, once to record. There will be some records for which this just won't be enough, so they'll get a sweep with a carbon fibre cleaning brush too and also be the ones I try last. Once I'm done, then the turntable and all the LPs will be sold, but that may take a while yet.
T.