05-14-2013, 02:41 PM
I am going to attempt my very first AM radio alignment on my 53-1750 console. Two questions:
1. The alignment instructions tell me to connect the "high side" of the signal generator to pin 6 of the 7A8 tube with a .1MFD capacitor in series with it. No problem. Then, it says to connect the "low side to B-".
"B-" means what??? A common ground in the circuit??
2. Alignment instructions tell me to connect a 1000 ohm per volt voltmeter across the voice coil for the output reading. My voltmeter is from Radioshack and has a digital readout. I don't know if it's a 1000 ohm/volt meter or not -- does it matter as long as the meter is reading volts going into the speaker? I don't want to blow anything up !!
Thanks folks,
Mike
1. The alignment instructions tell me to connect the "high side" of the signal generator to pin 6 of the 7A8 tube with a .1MFD capacitor in series with it. No problem. Then, it says to connect the "low side to B-".
"B-" means what??? A common ground in the circuit??
2. Alignment instructions tell me to connect a 1000 ohm per volt voltmeter across the voice coil for the output reading. My voltmeter is from Radioshack and has a digital readout. I don't know if it's a 1000 ohm/volt meter or not -- does it matter as long as the meter is reading volts going into the speaker? I don't want to blow anything up !!
Thanks folks,
Mike
