Bush TR114 Major Struggles

[Nowhere-Man]

The radio will most likely be positive earth so that the capacitor locations will have the positive sides going to the positive battery terminal. Just check with the meter on the lowest ohms range to confirm this and you should have no trouble getting them the correct way round.

I'm a bit wary of cobbling up the electrolytic polarity. I would rather have gotten film caps but Maplins only had electrolytic ones. The caps I removed had long upper leads and the lower lead was short. Going by the pics and my notes, the longer upper leads bend down from the top and are facing forwards so I conclude that the positive leads will be closest to me. I already did a few tests with the meter taking resistance from both perforations in the board between the solder pad and battery positive. So, logic would suggest the lowest resistance to + will be the capacitor + longer lead.

Still, it would make life simpler and surer if I was just going to use a film cap.

I still need to fix the track of the PCB and may just use superglue to pin down track edges and some tiny strands of wire I have. Then solder a bridge but away from the superglue area and finally test continuity.

I haven't done particularly well on this specific project and got caught out by lack of experience but I did my best to make better diagrams and may be lucky enough to get it going - time will tell.