10-04-2018, 03:46 PM
Hello all,
I finally got around to working on my 47-1230 and I think its safe to say that I may have bitten off more than I can chew.
First off, I have recapped the chassis and checked the connections to the best of my knowledge. Everything went well on the recap process but man is it a painstakingly slow process
After the recap and a little cleanup I decided to try and plug it in to see if it works at all.
I plugged in the speaker because I read it will damage the chassis if it is turned on without the speaker plugged in.
I turned it on and the two front lights came on and the tubes started slowly glowing, then the speaker started to hum.
With that being said, no sound except a hum was heard on any of the AM, FM, etc.... Actually FM is almost silent.
I really need help on where to start with the troubleshooting process. I have started with the "Section 1 - Troubleshooting" section of the philco papers that I have. But where from here??
These are the values I got with an input voltage of 122Vac
EtoC : 217 VDC
DtoC : 162 VDC
BtoC : -12.16 VDC
Resistor 100 I have 20 Kohms
Resistor 101 I have 138 Ohms
I know these values are a little off and one of my questions is how do I test the 5Y3GT tube?
https://www.dropbox.com/s/2pn126nyoqdp1l....png?raw=1
I finally got around to working on my 47-1230 and I think its safe to say that I may have bitten off more than I can chew.
First off, I have recapped the chassis and checked the connections to the best of my knowledge. Everything went well on the recap process but man is it a painstakingly slow process
After the recap and a little cleanup I decided to try and plug it in to see if it works at all.
I plugged in the speaker because I read it will damage the chassis if it is turned on without the speaker plugged in.
I turned it on and the two front lights came on and the tubes started slowly glowing, then the speaker started to hum.
With that being said, no sound except a hum was heard on any of the AM, FM, etc.... Actually FM is almost silent.
I really need help on where to start with the troubleshooting process. I have started with the "Section 1 - Troubleshooting" section of the philco papers that I have. But where from here??
These are the values I got with an input voltage of 122Vac
EtoC : 217 VDC
DtoC : 162 VDC
BtoC : -12.16 VDC
Resistor 100 I have 20 Kohms
Resistor 101 I have 138 Ohms
I know these values are a little off and one of my questions is how do I test the 5Y3GT tube?
https://www.dropbox.com/s/2pn126nyoqdp1l....png?raw=1
