Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12) x

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

551, 51, 51A clock radio
#2

An IF transformer is difficult thing to rewind and make it work properly. The type of wire, the distance between the coils, how it's wound, and the amount of Q of the coils are all factors that determine the IF transformer's performance. 

If the rewind looks like it's hand wound or spun on a drill I would look for a replacement 175kc transformer. They were popular from the '30s-50's so they're not hens teeth.

The resistance readings don't really mean anything in this case. It would just tell you if the coil is open or not. Your probably looking for about 20-30 ohms.

When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!

Terry


Messages In This Thread
551, 51, 51A clock radio - by Eric - 07-27-2023, 08:48 AM
RE: 551, 51, 51A clock radio - by Radioroslyn - 07-27-2023, 02:57 PM
RE: 551, 51, 51A clock radio - by Eric - 07-28-2023, 08:44 AM
RE: 551, 51, 51A clock radio - by Ron Ramirez - 07-28-2023, 08:55 AM
RE: 551, 51, 51A clock radio - by Eric - 07-29-2023, 11:40 AM
RE: 551, 51, 51A clock radio - by Eric - 07-29-2023, 03:37 PM
RE: 551, 51, 51A clock radio - by Ron Ramirez - 07-29-2023, 03:48 PM
RE: 551, 51, 51A clock radio - by Eric - 07-29-2023, 05:49 PM
RE: 551, 51, 51A clock radio - by Ron Ramirez - 07-29-2023, 07:09 PM
RE: 551, 51, 51A clock radio - by Eric - 07-30-2023, 02:39 PM
RE: 551, 51, 51A clock radio - by Ron Ramirez - 07-30-2023, 02:49 PM
RE: 551, 51, 51A clock radio - by Eric - 08-01-2023, 08:12 AM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Studebaker/Philco AC-2687 car radio
Hello, Richard the radio is an AC-2687 Studebaker model. The Philco model is S -5323 and the chassis p/n is S-5523Pdouglaski — 11:52 AM
48-482 rear panel help
The 48-482 is an AC only set as well, featuring a power transformer. While the transformer shouldn’t get “hot”, it is ye...jrblasde — 11:12 AM
Studebaker/Philco AC-2687 car radio
I gave a Chrysler/MoPar car radio from 1954, it was made by Philco, and it uses two chassis, one has the power supply an...Arran — 11:06 AM
48-482 rear panel help
Hello keithchip. You could make a hardboard back for the set, but make sure you provide plenty of ventilation holes in ...GarySP — 11:04 AM
Studebaker/Philco AC-2687 car radio
Welcome to the Phorum, Phil! Lots of friendly help here to assist you along the way! Take care, - GaryGarySP — 10:55 AM
Studebaker/Philco AC-2687 car radio
Hi Pdouglasti, Phirst off, welcome to the Philco Phorum, a Phamily Phriendly place phull of phun pholks and all things ...MrFixr55 — 07:37 AM
Philco 46-480 Electronic Restoration
Hi Richard, It is starting to get nice on LI also.  However, this week is a total wipeout.  I am in a really good Ca...MrFixr55 — 06:48 AM
Philco 46-480 Electronic Restoration
At long last, it is aligned! I’ve uploaded a couple of new videos to YouTube to demonstrate. YouTube picked up on Hall a...jrblasde — 10:08 PM
Studebaker/Philco AC-2687 car radio
Hello Phil, Welcome aboard what is the model number of that radio ? Sincerely Richardradiorich — 10:06 PM
Studebaker/Philco AC-2687 car radio
Just speculating of course, but you could probably find another transformer from another car radio of the same era, pref...Arran — 09:00 PM

[-]
Who's Online
There are currently 1148 online users. [Complete List]
» 1 Member(s) | 1147 Guest(s)
Avatar

>