10-31-2006, 08:00 AM
I live in Argentina, I have a Philco tropic model 821. I dont know how this radio come to this country, somebody give it to my father
The mine has 4 sw bands. I restored tha cabinet years ago, and this week I finished to restore the chassis, the problem was somebody modified the output stage and the power supply because here may be was not available the tubes 50A5 and 35Y4 and was replaced for similar octals.
I got the originals from Antique Elect. Supply but my problem was locate the schematic. My sticker inside the cabinet show only model "821".
I guess this one was after war model because before war philco circuits not use tubes series "14". So I located all the model 47-48 and 49 availables at Riders and compared the valve layout. After that I checked my RMS Philco radio Manual for 1941 and locate several models 110-220(may be that means all was tropics models) and located a very similar circuit, the philco 41-713. at least output and power supply match very well my tropic parts. So I wired the new output tuve using this schematics , power up the radio and work it perfect. I also calibrate guessing the padders and work excelent in BC and all the SW bands.
For the power supply I wired using a model 47 diagram with 35Y4.
I can send you a photo of my radio. I need some help to locate a missing plastic knob, a photo also of the chassis, because may be your radios are more complete that the mine. Mi glass dial is cracked but I know there is not remedy for this.
I guess If we can locate a RMS Radio service manual for 1948 or 1947 our model must be located there or a very similar models must be there.
Oscar Godenzi
The mine has 4 sw bands. I restored tha cabinet years ago, and this week I finished to restore the chassis, the problem was somebody modified the output stage and the power supply because here may be was not available the tubes 50A5 and 35Y4 and was replaced for similar octals.
I got the originals from Antique Elect. Supply but my problem was locate the schematic. My sticker inside the cabinet show only model "821".
I guess this one was after war model because before war philco circuits not use tubes series "14". So I located all the model 47-48 and 49 availables at Riders and compared the valve layout. After that I checked my RMS Philco radio Manual for 1941 and locate several models 110-220(may be that means all was tropics models) and located a very similar circuit, the philco 41-713. at least output and power supply match very well my tropic parts. So I wired the new output tuve using this schematics , power up the radio and work it perfect. I also calibrate guessing the padders and work excelent in BC and all the SW bands.
For the power supply I wired using a model 47 diagram with 35Y4.
I can send you a photo of my radio. I need some help to locate a missing plastic knob, a photo also of the chassis, because may be your radios are more complete that the mine. Mi glass dial is cracked but I know there is not remedy for this.
I guess If we can locate a RMS Radio service manual for 1948 or 1947 our model must be located there or a very similar models must be there.
Oscar Godenzi
