08-06-2017, 08:27 PM
Welcome to Golborne!
I wouldn't worry too much at this stage.
There were many sets using this valve line up and most used virtually identical circuitry (although I wouldn't trust Grundig not to do some things differently!)
The main differences were between battery only sets with 1.5V cells supplying parallel filaments and mains/battery sets which usually arranged the filaments in series, fed by a 7.5V battery.
So, if you can find any 4-valve set using the '96 valve range, it will be a useful guide to start with.
Obviously, if you can find the original circuit, that will be a bonus.
I wouldn't worry too much at this stage.
There were many sets using this valve line up and most used virtually identical circuitry (although I wouldn't trust Grundig not to do some things differently!)
The main differences were between battery only sets with 1.5V cells supplying parallel filaments and mains/battery sets which usually arranged the filaments in series, fed by a 7.5V battery.
So, if you can find any 4-valve set using the '96 valve range, it will be a useful guide to start with.
Obviously, if you can find the original circuit, that will be a bonus.
