Now for the second item in my TEA gathering quest, the function generator by Feedback Ltd, the FG600. This again, like the SM630, almost looks as if it was just taken out of the box, inside and out, the outside just needs a quick wipe down to remove a few spots of dirt, and it will be pristine gain. Inside it is perfect looking and dead easy to repair, the clamshell case is removed and leaves the circuit board supported by the front and back panels and some clever brackets, I wonder why this method is not used any more? Dating was pretty easy, there being only 3 IC's on the board, all made in 1974, so I'm assuming that is the era when it was made, although it might be later and used up old chips?
As mention in a previous post, those 4 Sprague caps (470uF) actually now measure around 500uF with an ESR of .4 ohms each, so they seem to be OK and will staying I think. If 1974 is the correct date of manufacture, then that might explain why it seems impossible to obtain copies of the user and service manuals as this would have predated the internet as well as PDF copies, but the company does still seem to around so a long shot, but they may have paper based copies and be willing to scan them for me?