01-29-2017, 02:04 PM
Now that I have a working signal generator, I'm attempting to align the set. Initially It was missing the phenolic hex adjuster on the sensitivity trimmer. I drilled and tapped a small piece of dowel for that. I followed the alignment procedure In Riders as well as the Philco publication for alignment. It will receive stations across the band but they are very sensitive. Any slight adjustment either way and it breaks into squeals and howls. You have to be dead on to receive. Adjustment to the sensitivity cap really has no effect across the band. Also the dial scale is off with reference to the station by more than 30k.c.'s. low.
For output measurement I had my VTVM set to AC volts and connected to the primary leads on the output transformer.
The signal generators output was verified with a frequency counter. Output was set as low as possible to still get a mid-scale meter reading.
When called for removing the grid clip from the Det.-Osc. and connecting the signal generator to the control grid, I just clipped on to the clip itself.
I think I'm doing this correctly, in fact the first two steps at 460k.c. was easy. Its the next two with the generator set to 1400k.c. and adjusting the antenna and HF that dosen't seem to be working correctly. Initially I skipped over those since I never did any repair work in that area, but the tuning issue with squealing and howling continued. All adjustments were made with a plastic tool I made. What am I missing or doing wrong?
For output measurement I had my VTVM set to AC volts and connected to the primary leads on the output transformer.
The signal generators output was verified with a frequency counter. Output was set as low as possible to still get a mid-scale meter reading.
When called for removing the grid clip from the Det.-Osc. and connecting the signal generator to the control grid, I just clipped on to the clip itself.
I think I'm doing this correctly, in fact the first two steps at 460k.c. was easy. Its the next two with the generator set to 1400k.c. and adjusting the antenna and HF that dosen't seem to be working correctly. Initially I skipped over those since I never did any repair work in that area, but the tuning issue with squealing and howling continued. All adjustments were made with a plastic tool I made. What am I missing or doing wrong?
