07-08-2019, 01:28 PM
Hi everyone! I, also, am restoring an 89-123. Fortunately I restored the cabinet first, in anticipation of a potentially brutal electronics restoration --and so far that resto has met my expectations. The speaker field coil was open (I will rewind it). The detector coil (7) is open (both windings). Hopefully I can figure out how to re-wind that.
I have questions about the DC resistance of the antenna transformer (2) and the 2nd IF xfmr (20): The print specs the antenna xfmr at 16.5 pri and 9 sec. My primary is 24 ohms (secondary matches the spec). Does that likely indicate a problem? Similarly, the print specs the primary of the 2nd IF xfmr at 69 ohms, and the secondary at 84 ohms. On mine, the primary is 99 ohms and the secondary is 117 ohms. I've read that the DC resistance isn't very telling, so maybe these values are okay? I'll appreciate any new information.
Regards,
Dion
I have questions about the DC resistance of the antenna transformer (2) and the 2nd IF xfmr (20): The print specs the antenna xfmr at 16.5 pri and 9 sec. My primary is 24 ohms (secondary matches the spec). Does that likely indicate a problem? Similarly, the print specs the primary of the 2nd IF xfmr at 69 ohms, and the secondary at 84 ohms. On mine, the primary is 99 ohms and the secondary is 117 ohms. I've read that the DC resistance isn't very telling, so maybe these values are okay? I'll appreciate any new information.
Regards,
Dion
