07-13-2022, 06:24 AM
For IF alignment - remove grid cap connector from the 77 (or 36, depending on which version of the 89 you have) and feed the signal generator output to the grid cap of the 77 (or 36) tube. Negative lead of the signal generator to chassis. Align the IF trimmers at 260 kc.
For RF alignment - Reconnect the grid cap connector to the 77 tube, and connect the signal generator output through a 200 pF capacitor to the set's antenna clip. Again, the negative lead of the generator goes to the chassis.
The complete alignment procedure may be found on page 14 of the book Aligning Philco Receivers by John F. Rider.
https://worldradiohistory.com/BOOKSHELF-...s-1937.pdf
Good luck.
For RF alignment - Reconnect the grid cap connector to the 77 tube, and connect the signal generator output through a 200 pF capacitor to the set's antenna clip. Again, the negative lead of the generator goes to the chassis.
The complete alignment procedure may be found on page 14 of the book Aligning Philco Receivers by John F. Rider.
https://worldradiohistory.com/BOOKSHELF-...s-1937.pdf
Good luck.
--
Ron Ramirez
Ferdinand IN
