04-12-2022, 12:53 PM
Hi,
Your set is not a Code 121. Later production model 37-630 sets changed the RF unit to one with fewer trimmer adjustments and a different band switch with less "throw" between positions. The Code number also changed.
If your 37-630 has the rectifier tube on top of the power transformer, it is a Code 125. If the 5X4G rectifier is behind the power transformer (on the main chassis), next to the 6F6G output tube, then it is a Code 126.
Service info here:
https://philcoradio.com/library/download...20251A.pdf
Your set is not a Code 121. Later production model 37-630 sets changed the RF unit to one with fewer trimmer adjustments and a different band switch with less "throw" between positions. The Code number also changed.
If your 37-630 has the rectifier tube on top of the power transformer, it is a Code 125. If the 5X4G rectifier is behind the power transformer (on the main chassis), next to the 6F6G output tube, then it is a Code 126.
Service info here:
https://philcoradio.com/library/download...20251A.pdf
--
Ron Ramirez
Ferdinand IN