[ftovar72]

Guys,

I bought the schematics and production changes from Chuck Schwark they are to arrive to my POBox after it will take 2 to 3 days to arrive Mexico. In the mean time I'm working on a "philco battery" for this beatiful radio, I will take pics and I will share the result, hopefully this small project become success.

Regards!

[ftovar72]

I hadn't shared anything because I had been busy these last days, but here we go... I got the schematics and during these last holidays I went to my hometown to visit an uncle that is electronic engineer but he was not available when i was there so I am still stuck with my radio ( still not working). Also I build a box that fits the battery section and it was made with a couple of BOSE speakers and a bluetooth amplifier, I made the box with wood and the result was not good enough. I will build it again and then if I am ok with the result I will share some pics. I got a new old radio (not philco it is NATIONAL) but it is interesting for restoration. Thanks for reading and I will continue my research to get my 46-350 work.

[Radioroslyn]

National Co from Mass?
They made a lot communications receivers from the 1920's thru the '80s

[ftovar72]

Hi,

After checking my 46-360 and diagrams from chuck I found that radio comes a little bit differences and looks like it was modified as an 48-360, so I followed the troubleshoot steps in 48-360 service documents. To test section 2 I used and old LG MP3 player as audio frequency signal generator 

[Image: http://casamadriddev.com/philco/Troubleshooting.jpg]

When I check in Test Point A I get sound with a choppy noise in the background, this sound maintains the same volume.

When I check in Test Point C I get clear music in speaker.

When I check in Testp Point D I get music with choppy speaker sound.

I am not sure if choppy sound (click) comes from C200 becasue in C point I dont get it in speaker, any thoughts ? 

Also I noticed something on Z300 component with PN P32-3970 when radio is on I can see something inside that lights in red I am not sure if that is ok

any thoughts ?

Regards!
Francisco Tovar

[ftovar72]

My bad it is not a light, it is a red cable that I didn't noticed before, according to trouble-shooting procedure I need to check Z301 and R300 and C302.

Updates next week

Regards!

[codefox1]

These are exceptional performers, and if the cabinet is in good shape, attractive as well. I've eliminated the troublesome battery/AC switch and fixed a couple of these sets to run on AC only, eliminated the 117Z3, used a diode and dropper resistor instead to get B+ and filament string well within limits. Be careful so as not to blow out filaments!