Indeed it wasn't the pinnacle of hi fi technology... mono and single ended class A.... a mighty 3-4W
Ok well all those black Hunts capacitors are dud and want replacing (you may find cracks in them if you look closely), The output valve is a nondescript after market one and may be suspect. The pretty Plesseys are probably working ok..ish and the selenium rectifier is highly suspect. When replacing with modern silicon unit you will need to add some dropper resistors in front of the SS one. A pair of 100 Ohm 5W wirewounds should suffice.
Arkless Electronics-Engineered to be better. Tel. 01670 530674 (after 1pm)
Modded Thorens TD150, Audio Technica AT-1005 MkII, Technics EPC-300MC, Arkless Hybrid MC phono stage, Arkless passive pre, Arkless 50WPC Class A SS power amp, (or) Arkless modded Leak Stereo 20, Modded Kef Reference 105/3's
ReVox PR99, Studer B62, Ferrograph Series 7, Tandberg TCD440, Hitachi FT-5500MkI, also FT-5500MkII
Digital: Yamaha CDR-HD1500 (Digital Swiss army knife-CD recorder, player, hard drive, DAC and ADC in one), PC files via 24/96 sound card and SPDIF, modded Philips CD850, modded Philips CD104, modded DPA Little Bit DAC. Sennheiser HD580 cans with Arkless Headphone amp.
Cables- free interconnects that come with CD players, mains leads from B&Q, dead kettles etc, extension leads from Tesco