Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

89-123 Coil DC resistance questions
#1

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


Messages In This Thread
89-123 Coil DC resistance questions - by Dion - 07-08-2019, 02:28 PM
RE: 89-123 Coil DC resistance questions - by Dion - 07-08-2019, 05:20 PM
RE: 89-123 Coil DC resistance questions - by Dion - 07-08-2019, 09:04 PM



Users browsing this thread: 3 Guest(s)
[-]
Recent Posts
HiFi (Chifi) tube amp build - but my own design.
Tim, nice write up and thanks for sharing !! Sincerely Richardradiorich — 02:47 AM
HiFi (Chifi) tube amp build - but my own design.
Well, this was a real "Hum-Dinger" :lol: ! This will be kinda long, but hopefully it will help others having t...TV MAN — 01:55 AM
Shadow Meter Bulb
Phorum members, I am trying to find the bulb # for PHILCO Shadow Meter part number 45-2180 that is from a 37-640 chassis...georgetownjohn — 06:53 PM
Philco 41-608 changer coupler
3D-printing...short of machining, of course. Or molding.morzh — 05:20 PM
Philco 41-608 changer coupler
Thanks, Morzh. That solves the issue of the rubber pieces. Now, I need to find a way to replicate the pot metal piec...alangard — 05:07 PM
12' Philco
If it is 12', either Kareem or Andre would have to jump pretty high to look at the front panel. Kareem would have an e...morzh — 01:48 PM
12' Philco
And here's a story about the tires on the truck. Same "no-stoop" guy must have installed these! Take care a...GarySP — 01:17 PM
Hickok AC51 tube tester
I think they have only shown the secondaries of the transformer. Two of them feed the rectifiers' filaments.morzh — 12:58 PM
IF can wire size and Rubber mounts?
Arran If the wire inside cans is the gauges you mentioned, the sole reason for that would be mechanical, to stiffen t...morzh — 12:56 PM
12' Philco
Rod, Yes, I know, but the Giant Philco is not around anymore either, so I go by whoever was alive fairly recently. H...morzh — 12:54 PM

[-]
Who's Online
There are currently 6493 online users. [Complete List]
» 2 Member(s) | 6491 Guest(s)
AvatarAvatar

>