02-02-2006, 05:24 PM
Hi Steve- I don't mind the questions- shows you're interested, and helping 
Maybe Chuck will see something I missed here. as well... My reply may seem slightly jumbled- A lot went on while I was in there, and I'm trying to recall everything. I broke it into short paragraphs, however :
Ok- The radio was flat dead when purchased. I replaced all the caps(including Micas) with new(10% rule, when original values not available) and all the resistors(10% rule, as well), as many had value changes. (The only resistors I really question are the two wire wrapped power ones: they were replaced with metal oxide ones.) All the bakelite caps were replaced with orange drops in the original bakelite cases.
All the electrolytics have been rebuilt. The fuse mentioned was aded to the circuit by me, and is a 1.5amp. Tubes have all been checked, and rechecked on a Precision 654 tube tester, both for shorts and emissions.(This is the kind of tester where it heats up the tube, and runs it to test.) all at this point are either good, or very good condition.
All the switches have been cleaned. All the RF coils from all three sections have been checked for continuity(all were good). All the wiring, save for the Shadow Meter, has been replaced with new(I did one wire at a time, and all is about the same gauge as original. Only difference, most of the original solid wire now replaced with stranded.) Wire is 20ga. 600vt. cloth covered.
The RF cans have been checked for continuity, and the leads replaced, due to deteriorated wiring.(Most of the wiring in this set was well cooked- if I moved it, the coverings would break instantly.)
I've been working to the original schematic(Provided by Chuck S.- Thanks!) to ensure my wiring was correct.
I have checked the Tone switch assembly, and substituted another Philco Volume switch in place of the original, which doesn't seem to be properly continuitized. This was done after I had it operating, after it stopped working properly.
When first switched on after the initial rebuild, the radio did operate, but with very low volume on most stations, and only on BC and the first SW bands. The volume never got very loud, save for a couple very strong local stations. I was able to hear all sorts of broadcasts on BC. Then, after a couple hours, it just got quiet all over, and hasn't made a decent sound since. If I scrabble about with the RF adj. cond.s, I can get a wee-oooweeee sound while turning the tuning coils. Other than cheap special effects, of no real use to me that way... ;) lol
Oh, and Chuck- I never bothered putting in the cloth covered power cable... After all that discussion with you and Ron, I decided to reuse the original, which is in good shape, but not with a molded plug... I'll save the other for the Model 20 sitting here, waiting to become a topic of discussion...
Thanks for any ideas-
Scott
Maybe Chuck will see something I missed here. as well... My reply may seem slightly jumbled- A lot went on while I was in there, and I'm trying to recall everything. I broke it into short paragraphs, however :Ok- The radio was flat dead when purchased. I replaced all the caps(including Micas) with new(10% rule, when original values not available) and all the resistors(10% rule, as well), as many had value changes. (The only resistors I really question are the two wire wrapped power ones: they were replaced with metal oxide ones.) All the bakelite caps were replaced with orange drops in the original bakelite cases.
All the electrolytics have been rebuilt. The fuse mentioned was aded to the circuit by me, and is a 1.5amp. Tubes have all been checked, and rechecked on a Precision 654 tube tester, both for shorts and emissions.(This is the kind of tester where it heats up the tube, and runs it to test.) all at this point are either good, or very good condition.
All the switches have been cleaned. All the RF coils from all three sections have been checked for continuity(all were good). All the wiring, save for the Shadow Meter, has been replaced with new(I did one wire at a time, and all is about the same gauge as original. Only difference, most of the original solid wire now replaced with stranded.) Wire is 20ga. 600vt. cloth covered.
The RF cans have been checked for continuity, and the leads replaced, due to deteriorated wiring.(Most of the wiring in this set was well cooked- if I moved it, the coverings would break instantly.)
I've been working to the original schematic(Provided by Chuck S.- Thanks!) to ensure my wiring was correct.
I have checked the Tone switch assembly, and substituted another Philco Volume switch in place of the original, which doesn't seem to be properly continuitized. This was done after I had it operating, after it stopped working properly.
When first switched on after the initial rebuild, the radio did operate, but with very low volume on most stations, and only on BC and the first SW bands. The volume never got very loud, save for a couple very strong local stations. I was able to hear all sorts of broadcasts on BC. Then, after a couple hours, it just got quiet all over, and hasn't made a decent sound since. If I scrabble about with the RF adj. cond.s, I can get a wee-oooweeee sound while turning the tuning coils. Other than cheap special effects, of no real use to me that way... ;) lol
Oh, and Chuck- I never bothered putting in the cloth covered power cable... After all that discussion with you and Ron, I decided to reuse the original, which is in good shape, but not with a molded plug... I'll save the other for the Model 20 sitting here, waiting to become a topic of discussion...
Thanks for any ideas-
Scott
Old Cars, Old Radios, Old Pipes and Young Women... What more is there?
