All valve, no solid state devices, probably made 2002 from barcode date? and
2001 date on Sovtek 5AR4. Powered on for about 5 seconds with cracks and bangs then HT light went out and dead. Inside looks and smells fine but "gently" blown HT fuse. I've not tested the valves yet. 1 of the 22K 1/3W HT R/C dropper resistors slightly discoloured and all 4 EL84 1/2W, 100 ohm grid resistors slightly discolured. Someone has crudely cut one of the 2 grounds to the pcb, presumably trying to reduce hum when it was working. All DVM DC resistance measurements of the transformers seem ok. Any pointers to known problems with this version?-- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on