TR2/3/3A Lucas/Peter Pan part two. [TR3 wiper] Thanks

[TexasKnucklehead]

Just to be clear, when I made my new brush spring retainer, I used the plastic from the peter pan lid, not the cardboard. Since then, I made three more out of different materials. First I used a "break-away" (fiberglass) from a printed circuit board, but it had Vcc/Gnd planes between layers and was not a good insulator. Then I made one from some clear lexan, which might work, but I thought it was about as soft as the plastic lid. Then I made one from "call grade formica", thanks to fellow member Moses. I used a dremmel cut-off wheel placed into a drill press to cut the tiny part. I also replaced the spring. I think it's about as good as new now... aside from the brush wear. (spec says it should draw from 2 to 3.5 amps, and I read 2.7v across 1 ohm.) Thanks for all the input.

Jerry
(I think this is actually a TR4 assembly, because the TR3 doesn't have the "limit switch" -the stainless steel cover shouldn't even have a hole for the raised cover.)

 

[TR3driver]

I agree, Lexan is a poor choice because it softens when it gets hot. PCB fiberglass (or phenolic if you start with a foreign-made PCB) should work fine, of course without the power and ground planes

Only very early TR3s lacked the park switch (dome that sticks through the cover). According to the VTR production history it changed at TS12567. And TS13571L certainly has it, on a motor dated 1956. Has the right wiring for it, too.

BTW, FWIW, etc. I prefer to keep the 'rack' (long cable thingy) inside it's housing where it doesn't get dirty and so on. It's easy enough to undo the cover and remove the link when you R&R the motor, to leave the rack behind. And that way you also don't have to worry about it leaving greasy tracks anywhere it touches.

 

[71MKIV]

Well done!

 

[martx-5]

...

BTW, FWIW, etc. I prefer to keep the 'rack' (long cable thingy) inside it's housing where it doesn't get dirty and so on. It's easy enough to undo the cover and remove the link when you R&R the motor, to leave the rack behind. And that way you also don't have to worry about it leaving greasy tracks anywhere it touches.

Much easier this way. Nice job.