Possibly rust and an oxidized soldering joint caused the fault. IMHO the ground connection was not intentional, but part of the problem. For rust removal I had good luck with citric acid. It is available in supermarkets here and also recommended for the maintenance of coffee machines. It is cheap, safe and good to work with. It works even quicker on non-ferrous metals. Those flat parts would be easy to just sand them off, or do I overlook something here? The old wire might work just fine if rewound, but as well might not. If the old enamel isolation fails,and some windings short out, you won't notice it measuring the DC resistance. But the performance of the receiver would greatly suffer. Good luck with your repair, it appears to me you are on the right path!
Since the receiver is not good the way it is, I decided to take a shot at repairing it.
After looking at it, I decided the problem must be the connection between the coil and the frame. My guess was since I can't see a joint between the two coils, they joined the non terminal end to the core.
Got the coils out (minimal damage) ... right away I could see oxidation and rust.
I unwound the coil ... tried to keep count of the windings.
Wire is .005" ... #36
I will measure the length ... I think it was about 550 windings (lost count a few times).
I was right ... the coils joint together using the core and frame as the jumper.
At the end, the wire was just press against the core .... then a few layers of paper ... then the windings.
So, I tried a bit of steel wool on the core ... better but not great.
How should I clean the metal parts?
I can buff them (use my dremel) ... or use electrolysis ... or vinegar ... or navel jelly ... or ?
Once clean, I can try rewinding using the existing wire ... if this does not work, I will measure the length of wire and try winding with new wire.
I let capacitor charge for 5 minutes disconnected both leads from counter dialed 1 digit read 6 volts dialed 2nd digit read 6 volts. The circuit was wired as first shown with resistor & capacitor. A soon as you remove J wire off counter you can break dial tone and call out just can't figure this out if the problem is the RC circuit or if a working counter would resolve the issue
Very nice! I've seen gold commemorative phones but never silver.
It is possible to metal plate plastic (all those chrome parts in automotive trim) so it could very well be a top plating of silver. IIRC, they use electroplating which requires a base (like using a primer for paint) coating that allows the metal to be electroplated onto the item.
Anyway, after polishing the metal finish, I would give it a coat or two of Renaissance Wax (a micro-crystaline non-organic wax which does not contain acidic ingredients found in carnauba, bees or other organic based waxes which are not good as a preservative over time) was created by the British Museum to protect a lot of different stuff for a long time. This is one description from a RenWax seller:
"Renaissance Wax Polish. 65ml. Refined waxes blended to a formula used by the British Museum and restoration specialists internationally to revive and protect valuable furniture, leather, paintings, metals, marble, imitation and many other surfaces both housed and exposed to weather. Freshens colors and imparts a soft sheen. Professional conservators throughout the world depend on Renaissance Wax to protect their collections. Properly applied, a little goes a long way."
And from another eBay seller's listing"
"RENAISSANCE MICRO-CRYSTALLINE WAX/ POLISH from England has been the #1 choice of major museums, art galleries and institutions for the preservation of their precious pieces. Professional conservators, retailers, amateur restorers and private individuals throughout the world depend on Renaissance Wax to protect their collections and for home use."
It doesn't increase or decrease shine, just puts on a long term protective coating. Here's one eBay seller, you can search eBay for many sellers of "Renaissance Wax"
Hi All, I bought this 1973 WE trimline at an online auction recently for $16. I don't normally go for stuff like this but I was so curious that I could not resist. This is a WE presentation piece that commemorates 25 years of operations at the Indianapolis works, and the 141 millionth WE phone.
Aside from the obvious that is on the attached medal, does anyone know more about this? One surprise is that it appears to be plated over plastic. At least it seems that way. The phone has some extra heft and the surface responded well to silver cleaner, leaving my rag with a black tarnish mark.
Regardless, it is one of the most unique items I have come across and will find a spot in my growing collection.
Applied 6volt DC just a light clicking.If you push the Clapper with 6 volts dc then remove power the Clapper returns and advances the digit. The coil has continuity and reads 306 ohms. The other issue is when I hook up the counter it won't break dial tone but when removing one wire from counter I can dial out. I don't want to spend 20.00 on a counter then not be able to dial out. Do you think the counter is the problem for not breaking dial tone to dialing out? When energizing Clapper doesn't pull in. Would like some input
Last post by countryman - Yesterday at 03:22:09 PM
Presumably an intermediate station with a rotary / automatic office part combined with a line selector intercom. An office call can be put on hold while making an internal call via the intercom part. The called extension then can switch over to the office line, using a similar station. Early "PBX alternative"... In the picture there's a wooden version for 2 office lines and 10 internal extensions.