02-08-2023, 03:51 PM
Hi Tiddat,
The faint volume, is that with the open interstage transformer primary or have you "bridged" it using the Ramirez Technique? If low because the xformer is open, then replacing it or "bridging it" will resolve.
+1 On Terrys (RadioRoslyn's) suggestion of touching the grid of the detector and RF Amps one at a time to see if volume increases. Primaries have been known to open on early Philco RF transformers.
one other thing and it is a biggie! R35 is a "voltage divider" with multiple taps, and gets its power from the field coil (point G). It is very likely that the resistance section between connections 3 and 4 is open. That would lower field coil current and raise all of the other voltages.
Phorum Experts may have the value of the resistor. All sections should be replaced with wirewounds of at least 5 W.
Good luck, you're getting warm That resistor section was also warm before it got cold.
The faint volume, is that with the open interstage transformer primary or have you "bridged" it using the Ramirez Technique? If low because the xformer is open, then replacing it or "bridging it" will resolve.
+1 On Terrys (RadioRoslyn's) suggestion of touching the grid of the detector and RF Amps one at a time to see if volume increases. Primaries have been known to open on early Philco RF transformers.
one other thing and it is a biggie! R35 is a "voltage divider" with multiple taps, and gets its power from the field coil (point G). It is very likely that the resistance section between connections 3 and 4 is open. That would lower field coil current and raise all of the other voltages.
Phorum Experts may have the value of the resistor. All sections should be replaced with wirewounds of at least 5 W.
Good luck, you're getting warm That resistor section was also warm before it got cold.
"Do Justly, love Mercy and walk humbly with your God"- Micah 6:8
"Let us begin to do good"- St. Francis
Best Regards,
MrFixr55
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