01-23-2015, 11:44 PM
For what it's worth...
If you look at the partial schematic and compare it to the photos above, you may notice an extra mica capacitor and resistor. This was a production change:
[Image: http://www.philcoradio.com/images/phorum...88_rev.jpg]
This 42-788 has the changes. The 100 pF cap is new.
Of course, that won't fix an open winding on a coil.
And Sam, if you see this...your 38-1XX 1st IF works well in this 42-788.
Even though the 38-1 has a 470 kc IF, the transformer tunes up fine at 455 kc.
If you look at the partial schematic and compare it to the photos above, you may notice an extra mica capacitor and resistor. This was a production change:
[Image: http://www.philcoradio.com/images/phorum...88_rev.jpg]
This 42-788 has the changes. The 100 pF cap is new.
Of course, that won't fix an open winding on a coil.
And Sam, if you see this...your 38-1XX 1st IF works well in this 42-788.
Even though the 38-1 has a 470 kc IF, the transformer tunes up fine at 455 kc.
--
Ron Ramirez
Ferdinand IN
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
