01-20-2021, 01:35 PM
Hi,
1. Should it be bare copper wire
No as it would just electrically look like a short.
or enameled, etc. Yes.
2. Do you know of a good source for said wire?
I don't really have any favorites as I've been doing this for a long time. Would pickup a few rolls here and there at radio swaps and hamfests. If you needed a larger gauge wire sometime a motor rebuild shop is a good source. They have end of spools that are enough to fix up a coil or two and some times they can be talked out of them. About the smallest they carry is 24 or 26G.
Normal channels like Amazon or Ebay should ok to find the 40G
3. Any tips as to removing that bobbin without damaging/distorting the main tube and its coils?
I did one a yr or so ago but I don't really remember the blow by blow description. I would do this. If the tabs sticks past the edge of the coil form sand them down with a Dremel so they are even with the form's sides. Use a heat gun to warm the top of the form up a bit (not trying to set it on fire or melt it or any like that). See which part has more give the coil form (I would think) or the tabs holding the small coil in the center. If it's the form squeeze it a little to release the tab. If it's the tab stick a dowel thru the center of the form and push it out.
Or you could take your dikes cut the top of the form on one side to release the tab. With one side gone it should come out easily. Use a dab of hot glue to reinstall it.
Will I be jeopardizing the other coils (from 1932) with such a move? What's a safe way to get it done?
The easiest the safest would would be to cut one side of the top of the form where the tab is held in.
1. Should it be bare copper wire
No as it would just electrically look like a short.
or enameled, etc. Yes.
2. Do you know of a good source for said wire?
I don't really have any favorites as I've been doing this for a long time. Would pickup a few rolls here and there at radio swaps and hamfests. If you needed a larger gauge wire sometime a motor rebuild shop is a good source. They have end of spools that are enough to fix up a coil or two and some times they can be talked out of them. About the smallest they carry is 24 or 26G.
Normal channels like Amazon or Ebay should ok to find the 40G
3. Any tips as to removing that bobbin without damaging/distorting the main tube and its coils?
I did one a yr or so ago but I don't really remember the blow by blow description. I would do this. If the tabs sticks past the edge of the coil form sand them down with a Dremel so they are even with the form's sides. Use a heat gun to warm the top of the form up a bit (not trying to set it on fire or melt it or any like that). See which part has more give the coil form (I would think) or the tabs holding the small coil in the center. If it's the form squeeze it a little to release the tab. If it's the tab stick a dowel thru the center of the form and push it out.
Or you could take your dikes cut the top of the form on one side to release the tab. With one side gone it should come out easily. Use a dab of hot glue to reinstall it.
Will I be jeopardizing the other coils (from 1932) with such a move? What's a safe way to get it done?
The easiest the safest would would be to cut one side of the top of the form where the tab is held in.
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!
Terry
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
