12-08-2016, 08:55 AM
I'm working on my first restoration, which is on a model 19x I picked up a few weeks ago. The previous owner said the radio worked, but before I powered it on I took the chassis out to clean and inspect. I also ordered the schematics from Chuck with plans to replace any faulty capacitors. As I was going through the schematic, I noticed that there was several parts on the radio that were not shown in the schematic. Looking in the change notes and from Ron's post on the evolution of the model 19 (http://philcoradio.com/phorum/showthread.php?tid=15008) I was able to identify one of these parts which was added later on (a resistor). However, I have identified three capacitors that are not in the schematic or in the change notes. All three of these capacitors are in different locations but are connected to the lugs on the original bakelite capacitors.
- 2 Aerovox caps; molded paper with unknown capacitance value. The cap is molded in a brown plastic, with only 1 Orange dot. The dot is in the location of the 3rd dot in the normal 3 dot color coding scheme.
- 1 Solar cap; paper cap of .09 uF
This leads me to my questions:
1) Is it possible that these caps were added after the radio was manufactured? Possibly by someone attempting to repair the radio? I figured Philco would use a Philco capacitors since this site lists part numbers for capacitors (http://www.philcorepairbench.com/partinfo.htm). My guess is that the capacitors in the bakelite casing have shorted so they may have added these "replacement" capacitors on the outside of the casings???
2) How do I interpret the Aerovox capacitor color code with only one dot? Is it possible that the first two dots are to be interpreted as brown? I also looked for any markings on the case. It only says, "AEROVOX", "PATENTED", "MADEINUSA", and "MFD.".
I apologize if this issue has been raised before. I searched through the other threads with no luck. The information on this site has been tremendously helpful thus far, so thank you.
Van
Falls Church, VA
- 2 Aerovox caps; molded paper with unknown capacitance value. The cap is molded in a brown plastic, with only 1 Orange dot. The dot is in the location of the 3rd dot in the normal 3 dot color coding scheme.
- 1 Solar cap; paper cap of .09 uF
This leads me to my questions:
1) Is it possible that these caps were added after the radio was manufactured? Possibly by someone attempting to repair the radio? I figured Philco would use a Philco capacitors since this site lists part numbers for capacitors (http://www.philcorepairbench.com/partinfo.htm). My guess is that the capacitors in the bakelite casing have shorted so they may have added these "replacement" capacitors on the outside of the casings???
2) How do I interpret the Aerovox capacitor color code with only one dot? Is it possible that the first two dots are to be interpreted as brown? I also looked for any markings on the case. It only says, "AEROVOX", "PATENTED", "MADEINUSA", and "MFD.".
I apologize if this issue has been raised before. I searched through the other threads with no luck. The information on this site has been tremendously helpful thus far, so thank you.
Van
Falls Church, VA
