GE g-97 - Printable Version
+- The PHILCO Phorum (https://philcoradio.com/phorum)
+-- Forum: Various and Sundry Categories (https://philcoradio.com/phorum/forumdisplay.php?fid=37)
+--- Forum: Other Radios (Non-Philco) (https://philcoradio.com/phorum/forumdisplay.php?fid=12)
+--- Thread: GE g-97 (/showthread.php?tid=19644)
+- The PHILCO Phorum (https://philcoradio.com/phorum)
+-- Forum: Various and Sundry Categories (https://philcoradio.com/phorum/forumdisplay.php?fid=37)
+--- Forum: Other Radios (Non-Philco) (https://philcoradio.com/phorum/forumdisplay.php?fid=12)
+--- Thread: GE g-97 (/showthread.php?tid=19644)
Pages:
1
2
RE: GE g-97 - jcassity - 02-15-2019
thats odd,,
the right hand side of the transformer you posted shows .8ohms.,,, yes at the speaker end its 5 ohms.
its odd you come up with a resistance value that ***IS*** shown on the diagram.
RE: GE g-97 - 35Z5 - 02-15-2019
(02-15-2019, 07:59 PM)jcassity Wrote: thats odd,,
the right hand side of the transformer you posted shows .8ohms.,,, yes at the speaker end its 5 ohms.
its odd you come up with a resistance value that ***IS*** shown on the diagram.
Stranger things have happened, I've actually fixed a radio or two.
The green wire isn't absolutely necessary should work without it. It's part of a negative feedback circuit to improve audio clarity, except for higher end sets few have it.
RE: GE g-97 - jcassity - 02-16-2019
LOL,, yeah well i guess at this point i tend to get lucky when they end up working for me.
RE: GE g-97 - David - 02-16-2019
Sometimes when I get one working I say to my self " Blind pig finds a acorn "
RE: GE g-97 - rperry - 02-17-2019
(02-15-2019, 07:59 PM)jcassity Wrote: thats odd,,
the right hand side of the transformer you posted shows .8ohms.,,, yes at the speaker end its 5 ohms.
its odd you come up with a resistance value that ***IS*** shown on the diagram.
Im measuring .9 ohms at the voice coil where it should be 5 ohms, so i've ordered a new output transformer, fingers crossed this fixes my problem.
RE: GE g-97 - rperry - 02-19-2019
Bear with me, I'm fairly new to radios. I do have 5 ohms at the speaker, ( i was thinking the 5 ohms should be the secondary of the transformer) so with that I hooked up a second audio source while using the radios field coil and the speaker worked. Second problem was I was using a EICO s.g. I picked up not long ago and it was not working properly, I hooked up the sg-8 and I do have a signal on pin 4 of the 42 tube but its very faint. SO perhaps the output transformer is bad and not boosting my signal? or there is another problem; Im thinking there is another problem because there is no signal from the volume pot or strait to the tuning condensor. Ill start checking voltages
RE: GE g-97 - Kenneth F. Besso Jr. - 02-19-2019
I had something like this happen,,,But ,,the transformer and speaker field. were wired WRONg in the plug ,,,Backwards,,,and still have a little tiny amount of sound,,,,till ,,I traces it all back to the tubes,,
RE: GE g-97 - rperry - 02-19-2019
I believe I have found one of my problems (circled part) Instead of the 6.4 ohms, I'm measuring 22k... in the 1st IF can, Im not sure how to go about correcting that yet. I've decided to trace every wire back on the print and check every resistor along the way, I,ve found a few pretty far out of spec but not sure if that would cause my problem. But im certain that IF would. Any suggestions on repairing are welcome. TIA
RE: GE g-97 - 35Z5 - 02-20-2019
If winding in IF transformer is open generally they require replacement, though sometimes brak is visible and can be repaired.
RE: GE g-97 - morzh - 02-20-2019
Most likely than not the winding is open.
It is worth opening the can and seeing if it could be repaired before embarking on a search for a spare IF can.
RE: GE g-97 - rperry - 03-06-2019
After a 2 week break away from the radio with family matters, im back on it, I found the break and I took a couple wraps off the IF transformer that was reading open. Im now reading 7.4 ohms through the transformer instead of 6.4 ohms, hopefully this wont effect it much?
I am now getting a clear signal on pin 4 of the 42 tube but not one on the middle pin of the volume pot.
RE: GE g-97 - rperry - 03-08-2019
There was a bad ground on the 6f5 (thanks Terry for the help!), once that was fixed there was a awful squeal on the speaker. It turns out the humbucking part of the circuit that was disconnected originally was for a reason, once I put it back the way it was the squeal was gone and I started receiving. Time to do an alignment and get to work on the console.
RE: GE g-97 - Radioroslyn - 03-08-2019
Glad to hear ur making some more headway.
RE: GE g-97 - rperry - 03-15-2019