08-01-2013, 05:31 PM
Almost ready to order the replacement caps and resistors and restore this thing. With 5 exceptions, all of the caps are original. Some of them look like they are getting to be tricky to get to. In lieu of multiple posts, here are some questions I still have:
1. As I replace components, should all leads be covered with heat shrink tubing? What should I use as a heat source?
2. Should I remove the tubes prior to servicing?
3. If I want to clean the chassis and other components (e.g., tuning condenser), are there best practice tools and products? (BTW, I have a copy of Johnson's book)
4. Looking at pictures of other 140-90's on this site, the antenna is covered by some sort of cardboard (?) tube. The repair sheet describes it as "shielded" Should I make one? Out of what?
5. One of the "new condensers" is .01 mf, 1600v (I think this is no. 52). One of the old ones is 0.003 mf, 1000v (number 50). Should I use 1600 v replacements for both?
6. And finally, any common beginner mistakes I should watch out for?
If any of you are at Radiofest, enjoy visiting the Chicago area! - Thanks in advance - Roy
1. As I replace components, should all leads be covered with heat shrink tubing? What should I use as a heat source?
2. Should I remove the tubes prior to servicing?
3. If I want to clean the chassis and other components (e.g., tuning condenser), are there best practice tools and products? (BTW, I have a copy of Johnson's book)
4. Looking at pictures of other 140-90's on this site, the antenna is covered by some sort of cardboard (?) tube. The repair sheet describes it as "shielded" Should I make one? Out of what?
5. One of the "new condensers" is .01 mf, 1600v (I think this is no. 52). One of the old ones is 0.003 mf, 1000v (number 50). Should I use 1600 v replacements for both?
6. And finally, any common beginner mistakes I should watch out for?
If any of you are at Radiofest, enjoy visiting the Chicago area! - Thanks in advance - Roy
