06-11-2020, 10:55 AM
Not much of an update, but I jumpered in my electrolytic capacitors and replacement candohm resistor assembly and brought it up slowly and briefly to 110V but my B+ was lower than I liked so I brought it back down. I then broke out my ohm meter and found a 10 ohm short from B+ to chassis ground. I was just about to unsolder a heavily populated terminal for isolation when I saw a replacement Solar .05 cap buried by the bandswitch and sure enough that guy measured 10 ohms. Replacing it brought my B+ up to almost where I wanted it, but instead of messing with it I decided to just start replacing capacitors and resistors as needed along with servicing/cleaning the chassis and shutter dial assembly.
I decided to try my hand at making dog bone resistors. There are a couple of different approaches, the molding and the tubing method. Below is one example of the molding method:
https://ehscott.ning.com/forum/topics/do...esistors-1
I dismissed this because I felt the learning curve was a bit too high for this process.
That left the tubing method as shown in the following two videos:
https://www.youtube.com/watch?v=0ddMuSt_aR4
https://philcoradio.com/library/index.ph...resistors/
The first video mentioned TAP Plastics as a source for tubing but their shipping was insanely high. Steve Davis mentioned using Paper Mate pens so I ordered a box of 60 for just over $5 on Amazon, but the ones I received were slightly tapered so I went to a hobby shop looking for small tubing. I wanted 4 different sizes but they only had 1/4 and 5/16 in stock. I found the 3/8 and 7/16 on eBay and the combined shipping for both was only $1.99:
https://www.ebay.com/sch/m.html?_odkw=&_...n&_sacat=0
The seller is omnimodels and the brand of tubing is Evergreen if that link doesn't work.
I decided to use this tubing and instead of J-B KwikWeld I ordered some two part putty (milliput) since that seems less messy and easier to work with, but I have some J-B KwikWeld if needed for some reason.
Tearing the chassis and shutter dial assembly down for cleaning/servicing, re-stuffing the paper caps, and making the dog bones will draw this project out but I'll try to make periodic updates, especially on my dog bone project.
I decided to try my hand at making dog bone resistors. There are a couple of different approaches, the molding and the tubing method. Below is one example of the molding method:
https://ehscott.ning.com/forum/topics/do...esistors-1
I dismissed this because I felt the learning curve was a bit too high for this process.
That left the tubing method as shown in the following two videos:
https://www.youtube.com/watch?v=0ddMuSt_aR4
https://philcoradio.com/library/index.ph...resistors/
The first video mentioned TAP Plastics as a source for tubing but their shipping was insanely high. Steve Davis mentioned using Paper Mate pens so I ordered a box of 60 for just over $5 on Amazon, but the ones I received were slightly tapered so I went to a hobby shop looking for small tubing. I wanted 4 different sizes but they only had 1/4 and 5/16 in stock. I found the 3/8 and 7/16 on eBay and the combined shipping for both was only $1.99:
https://www.ebay.com/sch/m.html?_odkw=&_...n&_sacat=0
The seller is omnimodels and the brand of tubing is Evergreen if that link doesn't work.
I decided to use this tubing and instead of J-B KwikWeld I ordered some two part putty (milliput) since that seems less messy and easier to work with, but I have some J-B KwikWeld if needed for some reason.
Tearing the chassis and shutter dial assembly down for cleaning/servicing, re-stuffing the paper caps, and making the dog bones will draw this project out but I'll try to make periodic updates, especially on my dog bone project.
John KK4ZLF
Lexington, KY
"illegitimis non carborundum"
