Thanks Sam, I will give that a try next time, this time I used an old, more of the period, cardboard tube BMI capacitor and re-stuffed that. .
I was in 2 minds as to what to do with C9, a 200pf waxed paper cap. It was showing a very small leakage, about 3uA at 300v DC, it is rated at 1500v. But from the circuit diagram it did not seem to have any DC on it which could leak. In the end I changed it as when I measured it on my DMM it was measuring 267pf.
When I came to C6 today I got really confused, it was not present, I thought maybe I had cut it out yesterday but it could not be found anywhere.
I finally found out that the large brown waxed cap, in the lower left centre of the chassis photo, was in a roundabout way connected to the same points, so this large .4uf cap must have been substituted for the original .1uf one at some time in the distant past.
It is interesting to see this superhet radio has a "reaction control" in the IF valve circuit. It is a trimmer type cap with a small black knob fitted and located at the read of the chassis, so it is probably something which is adjusted to suit your local reception area.
In the top left of the circuit diagram there are 2 unnumbered capacitors, these are made up of twisted enamelled wire, I wondered what they were at first.
Here is a photo of the Underside of the chassis after the restoration. All capacitors have been changed now, except for the two 25uf cathode bypass caps for V2 and V3, still waiting on delivery of these. These will go in the 2 cardboard tubes with metal end caps bolted to a bracket in the centre of the chassis.
Mike
I was in 2 minds as to what to do with C9, a 200pf waxed paper cap. It was showing a very small leakage, about 3uA at 300v DC, it is rated at 1500v. But from the circuit diagram it did not seem to have any DC on it which could leak. In the end I changed it as when I measured it on my DMM it was measuring 267pf.
When I came to C6 today I got really confused, it was not present, I thought maybe I had cut it out yesterday but it could not be found anywhere.
I finally found out that the large brown waxed cap, in the lower left centre of the chassis photo, was in a roundabout way connected to the same points, so this large .4uf cap must have been substituted for the original .1uf one at some time in the distant past.
It is interesting to see this superhet radio has a "reaction control" in the IF valve circuit. It is a trimmer type cap with a small black knob fitted and located at the read of the chassis, so it is probably something which is adjusted to suit your local reception area.
In the top left of the circuit diagram there are 2 unnumbered capacitors, these are made up of twisted enamelled wire, I wondered what they were at first.
Here is a photo of the Underside of the chassis after the restoration. All capacitors have been changed now, except for the two 25uf cathode bypass caps for V2 and V3, still waiting on delivery of these. These will go in the 2 cardboard tubes with metal end caps bolted to a bracket in the centre of the chassis.
Mike
