I have a Philco model 47-1227. It has been completely restored. All capacitors and resistors have been replaced. The audio works. We get sound from the record player but unable to tune in any stations. Have minis 2.5 volts at osc. tube. osc. tube does not change voltage when tuning dial is changed. No am or fm. Any ideal what's wrong? HELP!!!!!!!!?!
Time to break out the signal generator and inject a modulated 455kc signal @ test point A. This is w/the set set up to receive an AM signal and see what you get from the spkr.
Receive nothing from test point A or when connected to antenna
Ok inject a 455kc signal @ pin 1 of the 6ba6 and see what you get from the spkr.
We get nothing from pin 1
How about pin 6 on the 7R7.
Pin 6 works with. Get loud tone
Pin 6 works. Hey loud tone.
Ok so you have a problem around the 6BA6. Check the pin voltages according t o the service info. Also be sure the heater is lit.
pin 1. -.26 volts
pin 2. 0 volts
pin 3. 0 volts
pin 4. 0 volts
pin 5. 280 volts
pin 6. -1.14 volts
pin 7. .06 volts
Heater is lit
filament should be pin 3 & 4 and pin 6 should be 100v
pin 3 grounded at center of tube
pin 4 shows 6.6 volts ac
The tube is lit and working
pin 6 should not be reading -1.14 it should be 100V check the resistors and capacitors in that circuit.
Will check Tomorrow night.