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

Philco 52-541 Loop Antenna Help
#1

Philco 52-541 - Was wondering if someone could tell me how many turns the loop antenna has? Mine is missing.


Attached Files Image(s)
   
#2

Looking at the sch you could use a ext ant, sorry unable to answer your question.    
#3

>Looking at the sch you could use a ext ant

Not so much. The circuit needs to have the loop in circuit to form the tuned circuit connected to the input of the mixer. I don't think there is anything particularly special about the loop except the size and the inductance. If you happen to have a spare loop from another set that fits give it a go. If your spare was use with 365 pf tuning cap then it should fine as is. You can check it's resonant's by how well it receives at the high end. If the ant trimmer doesn't have a peak remove a turn from from the loop.
Or
http://www.sparkbench.com/loopante2.html


GL
Terry

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
#4

Mine has 16 turns of about # 26 gauge enamel wire. It is wound flat, like ribbon cable, wound to fit the  inside of. The cabinet
Joe

Joe Bratcher near Louisville, KY
#5

Thanks Terry, I tried a generic loop (from tubes and more) with poor results, and one from a GE J64 which was better, but I think not right.

Thanks Joe, I'll give that a try. SAMS diagram quoted a value of 3.1 ohms.
#6

For anyone interested, this was resolved using 16T of #29 wound around a cardboard form (shaped to the cabinet opening). I secured the windings with varnish to brown packing paper, which looked authentic.

Measured 3.1ohms, 0.227mH; which was right in the middle of what the resonance calculator determined (using ends of tuning cap range).

Performance was great, and even worked well without an external antenna.




Users browsing this thread: 2 Guest(s)
[-]
Recent Posts
Philco 91 Speaker Replacement
I can't remember, but there was a particular product for loosening glue on the more modern "spiders", used pos...MrFixr55 — 09:43 PM
Philco 91 Speaker Replacement
The spider is glued on the cone and so is the voice coil. I think you can use a cotton swab dipped in acetone and carefu...RodB — 02:42 PM
Restoring Philco 37-604C
Yes I saw that. If I knew, I'd probably try to arrange for getting it myself. But I have just got one. Which does not m...morzh — 01:44 PM
Philco 38-2 Automatic Tuning
When you push the lever, you are supposed to rotate the disk to the desired station. Then the magnetic tuning will acqu...morzh — 01:42 PM
Philco 38-2 Automatic Tuning
I figure out the muting from another picture that helped. Now I need to know how the automatic tuning works. When I push...dconant — 12:11 PM
Philco 91 Speaker Replacement
How would I go about removing the spider from the cone?dconant — 12:04 PM
Philco 38-2 Automatic Tuning
Hello, I am having trouble getting my automatic tuning to stay unmuted. If I play with the tuning handle I can get it to...dconant — 10:51 AM
Does anyone make photofinish replacements?
Here’s the link to the DIY photofinish section of our site: klondike98 — 09:46 AM
Delco car radio Peko vibrator converstion issues
Hi Richard, Thx for posting the schematic.  As I remember as a kid, these were great performers for the time, likely...MrFixr55 — 08:56 AM
Delco car radio Peko vibrator converstion issues
hello mr Fixr, The Electro  Powersupply that I am powering the radio with has a huge choke plus a 10,000ufd electrolyti...radiorich — 10:58 PM

[-]
Who's Online
There are currently 1925 online users. [Complete List]
» 3 Member(s) | 1922 Guest(s)
AvatarAvatarAvatar

>