Thanks again, and
Jo thanks for all that info.
I'll need to put some time in on this as it's spoiling the hour long conversations with the Rivetess.
Avtrician, the CPU is only hitting 2 - 5% and today, available memory ~ 580 while receiving. ( PF usage 435)
Indeed, if I had been looking for a fault in basic circuitry, I would have guess at switching noise, but now I'll have a quick look at the things you've mentioned, and then put some speakers on the laptop. Me book is simply not getting writ...I've even given up JBing to put more time in on it! Back to a quill.