35A5 tube substitution - Printable Version
+- The PHILCO Phorum (https://philcoradio.com/phorum)
+-- Forum: Philco Radio Discussions (https://philcoradio.com/phorum/forumdisplay.php?fid=5)
+--- Forum: Philco Electronic Restoration (https://philcoradio.com/phorum/forumdisplay.php?fid=8)
+--- Thread: 35A5 tube substitution (/showthread.php?tid=16363)
+- The PHILCO Phorum (https://philcoradio.com/phorum)
+-- Forum: Philco Radio Discussions (https://philcoradio.com/phorum/forumdisplay.php?fid=5)
+--- Forum: Philco Electronic Restoration (https://philcoradio.com/phorum/forumdisplay.php?fid=8)
+--- Thread: 35A5 tube substitution (/showthread.php?tid=16363)
Pages:
1
2
RE: 35A5 tube substitution - wally73 - 03-15-2017
Thanks for the info. I'm learning a lot about tubes . Now if I can just remember it .
walt
RE: 35A5 tube substitution - TV MAN - 03-16-2017
Could be since your filament voltage is low, (due to the 50A5) is the reason your radio has 'other problems'.
RE: 35A5 tube substitution - wally73 - 03-17-2017
Yeah that could be. But I noticed that somebody before me had worked on the speaker extensively and probably couldn't fix it .
Strangely ,I just discovered that a Philco 41-225 that I have has exactly the same chassis as the 41-220 except for the push button feature and it also has a 50A5 tube in it and it works OK. I do have a 35A5 coming and I will use it .
But I am sure the speaker has problems and I'm looking to get it rebuilt or purchase a good used one IF I can find one. There should be one out there somewhere since they probably made thousands of these radios. Thanks for your input.
walt