No photos received for this thread as yet.

Ok will resend or maybe I forgot lol. Thanks Brad.
This set is turning out far better than expected. I am having the case done properly which I think it deserves.
When the last tech worked on it he had to drill a hole in the side of the case to mount the speaker transformer so I'm waiting for the new speaker to arrive so I can decide whether to fill it or not.

That Jumper wire was the culprit. Neatly done and to the untrained eye it looked like it should be there! Nope that terminal was wired to the dial lights.
And it has been recapped since that photo was taken.
Thanks for uploading Brad. Much appreciated.

Photos uploaded to Post 47.

A nice speaker arrived for this last night and will more than fill the space. I just have to make sure it doesn't foul the Chassis. I will have to remount the transformer on the side which is ok!

Hi Carl,
You need to explain this further. It doesn’t make sense to me that the jumper wire was the cause unless something else was going on? Don’t burn your house down with a faulty radio!

Dangerous Dave the dial lights were already earthed . Since removing the Jumper there is absolutely no sign of a short. This is also the filament line as well.
Plus I only ever test this gear with a massive isolation transformer, a variac and dimbulb. Nothing showed on the dimbulb after removing the jumper.

I would agree that it is never uncommon to have several faults from corrosive pins on tubes to Electrolytic caps presenting as a short. This being the main cause of damage that I see caused by exuberance & powering as a first step.

Having the ground on a heater wire is not desirable and it was not obvious without being there, as to that being filament. 5V Filament to ground would be be a dead short for a filament rectifier.

Either way it should to me, have been grounded off of the shield tag to chassis with the mains ground. Irrespective of the 6.3V wire going to ground.

Marcc there was two levels of work on this radio. The original was highly professional ( neat as a pin ) and the second was very patchy. I am guessing they plugged it in and couldn't work out why it wouldn't work so they just left it. Very wise.

Carl,
This still doesn’t make sense. Is there a fault within the Transformer. Did you complete a full Insulation Test of all windings and the shield?? Dim Bulb, insolation supply won’t tell you much in this regard.
Transformers primary role in a radio is isolation from the 240V primary supply. This seems to be misunderstood a lot of the time. Even the Safety Warning page on this site, fails to highlight the most important “Job” of the Power Transformer.

Dangerous Dave what I should have said is the wrong side of the dial/filements was earthed via that jumper.

Be careful of nomenclature. There are heaters and filaments and many older sets have both and some, several.

Sets with 5Y3, #80 #83V normally have their filament winding above ground, common to HV.DC. ("B rail" )Heater tubes do not albeit they can be above ground and the winding centre tapped.

One really is obligated to Tag & Test the primary circuit to comply with regulations especially if you change the cable. You can carry that a step further and isolate the transformer windings and test between them; I quite often do that.

From the photos and valve types it looks like a single IFT reflex suphet.
The oscillator coil is mounted right on the 6K8 socket good move for short leads.
Love to see a circuit drawn up for this one.
Fred.

Yes Fred I agree, I'd like to see a schematic. There's less than a dozen small components. Apparently the radio works well, so I could apply the diagram to my Air Hostess radio. Turns out the Hostess can produce lots of volume when tuned into my home station. All it needs is a reflex circuit for better performance on distant stations.

Here we go.
From the photographs I have sketched a diagram.

I have assumed that there is a second IF hidden somewhere or even two IF coils tucked into that can!
The circuit also does not quite use up all the capacitors seen and some resistors must be hidden.

If the set is a single IF reflex, there are plate resistors on the 6B7 to split the AF and IF we cant see.


Fred.