Tony
Im in Stewarton 12 mls south of Glasgow.
I have an old Cyrus 1 , the last of them (transformer from Glasgow). It is mint so ive recapped it and modded the PCB weaknesses, you are welcome to try it - BUT -
Im just a little concerned with your statement that your new speakers sound OK with vinyl and CD but not FM, DAB internet and streaming.
At best DAB audio quality is poor and what you get from internet and streaming will be heavily dependant on the sample rates you are receiving. FM used to be good but the old analogue signals sent from the Beeb to the transmitters is of course now digital and anything can happen there, particularly as the politicians keep trying to switch off FM. The quality argument in favour of FM can easily be cancelled out by digitally tweaking the path from Studio to transmitter.
Technics 1200 tweaked,Ianmac Bearing,DACT DIY Phono Pre, Belcanto CD-2, Engineered Switzerland DIY Renderer, Benchmark DAC2, Hypex NCore, ATC SCM40
2nd system --Engineered Switzerland DIY streamer, Sony CDP11,Topping D50 DAC, Hypex NCore. Kef 1point2 speakers. Ianmac Filters