05-09-2012, 04:06 PM
(This post was last modified: 05-09-2012, 04:34 PM by Radio Fixer.)
Back on track with the Integra.
David said: "French, pre-war, no circuit or info, been got at..."
Well if it were some multi-shortwave 10 or more valve set I might think Wow! can I do this. But its only 3 wavebands and 5 valves and even by 1936 some standardisation of circuit design was around so it should be fine. It will take time though but time is free and winter is coming so more of it to spare.
I'm concentrating on striping it at the mo, with detail drwgs and pics of course. I would like to get the chassis cleaned up and re-sprayed whilst we have this good weather... may make it. Understanding it and drawing a circuit can come later.
Doing that should be a walk in the park once I have sorted the RF end. Think the small canned coil is possibly an IF trap but I haven't found its trimmer yet. The approach is to take a stab at what coils do what and trace back to the switch contacts to sort of confirm this. Or maybe the other way around, work out how the switch works and draw a contact diagram and trace the coils back to it. Guess it will be a mix of both.
The celluloid? dial drum in the previous pics seems to be printed on the inside (haven't cleaned it yet) has an illuminating bulb at each end. I took the mains Xformer out first but now I understand it, I can see there is just enough space to move it laterally to get it out with out doing this. Wonder how much the service man charged for doing it?
The set has a shadow tuning meter that I stripped and cleaned up and re-sprayed. It had 16 swg copper wire soldered around it and a piece of Mecano securing it to an extending stud off one of the IF Xformers. Its simple, compared to those on a Philco, if you have ever seen one. Just a shadow closing from left to right but works well. I will have to make a bracket to mount it properly and can roughly see how it should be.
Where the valve bases and components are mounted is a sub-chassis (see above bottom pic) and came out complete which was handy. I haven't decided yet how I'm going to tackle that. Strip it completely top side and re-spray or trying to do that without removal by masking. Trouble is 'he' lathered silver paint up the side of the valve bases ... may be able to clean off with thinners and cotton buds etc.
Gary
David said: "French, pre-war, no circuit or info, been got at..."
Well if it were some multi-shortwave 10 or more valve set I might think Wow! can I do this. But its only 3 wavebands and 5 valves and even by 1936 some standardisation of circuit design was around so it should be fine. It will take time though but time is free and winter is coming so more of it to spare.
I'm concentrating on striping it at the mo, with detail drwgs and pics of course. I would like to get the chassis cleaned up and re-sprayed whilst we have this good weather... may make it. Understanding it and drawing a circuit can come later.
Doing that should be a walk in the park once I have sorted the RF end. Think the small canned coil is possibly an IF trap but I haven't found its trimmer yet. The approach is to take a stab at what coils do what and trace back to the switch contacts to sort of confirm this. Or maybe the other way around, work out how the switch works and draw a contact diagram and trace the coils back to it. Guess it will be a mix of both.
The celluloid? dial drum in the previous pics seems to be printed on the inside (haven't cleaned it yet) has an illuminating bulb at each end. I took the mains Xformer out first but now I understand it, I can see there is just enough space to move it laterally to get it out with out doing this. Wonder how much the service man charged for doing it?
The set has a shadow tuning meter that I stripped and cleaned up and re-sprayed. It had 16 swg copper wire soldered around it and a piece of Mecano securing it to an extending stud off one of the IF Xformers. Its simple, compared to those on a Philco, if you have ever seen one. Just a shadow closing from left to right but works well. I will have to make a bracket to mount it properly and can roughly see how it should be.
Where the valve bases and components are mounted is a sub-chassis (see above bottom pic) and came out complete which was handy. I haven't decided yet how I'm going to tackle that. Strip it completely top side and re-spray or trying to do that without removal by masking. Trouble is 'he' lathered silver paint up the side of the valve bases ... may be able to clean off with thinners and cotton buds etc.
Gary
