08-06-2023, 03:13 PM
Hi Tludka,
Does your signal generator have a modulator? Looking at the instructions from the 1948-49 yearbook, did Steps 2 and 3 work? Steps 2 and 3 will fail if the oscillator section of the 7A8 is not working.
If you set the signal generator to a frequency withing the broadcast band with the modulation tone on, can you receive the tone on your set? If the above is true, try another radio that uses a loop antenna (not a ferrite loop though. If the "test" set works but the one that you fixed does not, you may have a sensitivity issue. Try replacing the 7A8 if you have another laying around (unfortunately, this is not a common tube).
Do you get a lot of static, squealing, etc. on both sets, you may have the all too typical issue where the computer, smart TV, LED or CFL bulbs, etc. obliterates the AM signal.
Does your signal generator have a modulator? Looking at the instructions from the 1948-49 yearbook, did Steps 2 and 3 work? Steps 2 and 3 will fail if the oscillator section of the 7A8 is not working.
If you set the signal generator to a frequency withing the broadcast band with the modulation tone on, can you receive the tone on your set? If the above is true, try another radio that uses a loop antenna (not a ferrite loop though. If the "test" set works but the one that you fixed does not, you may have a sensitivity issue. Try replacing the 7A8 if you have another laying around (unfortunately, this is not a common tube).
Do you get a lot of static, squealing, etc. on both sets, you may have the all too typical issue where the computer, smart TV, LED or CFL bulbs, etc. obliterates the AM signal.
"Do Justly, love Mercy and walk humbly with your God"- Micah 6:8
Best Regards,
MrFixr55
