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

rewinding osc coil
#1

Looks like my osc coil in my Philco 41-250 has the green corrosion.

Any hints on rewinding it? Guage of wire, etc?

Thanks
#2

If enough of the coil has survived the corrosion, then
use a pin or needle to count the turns. Place the point
of the needle on the former, and using very gentle pressure,
slide it along the coil, counting the "bumps". Trying to unwind
the coil and count that way is doomed to fail. After you have
the number of turns, make a careful drawing of the coil,
including the number of turns, direction of winding, length
of the coils, and distances between the sections, if any.
Then carefully unwind the wire, and try to compute a diameter
of the wire. The exact diameter is not terribly important. Anyway,
from the length of the coil, and the number of turns, you
can get a diameter for the wire. Try to get something reasonably
close in diameter, and rewind.

Good luck




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Zenith H725
David - I think I understand but what units are you discussing (Low of 1.7, high of 3.9)? Budget constraints for Ham ...EdHolland — 01:43 PM
My Philco 37-116 Restore
You're doing great. I wish I could be more involved, but my mind is right now preoccupied with the reason I am here in ...morzh — 12:21 PM
My Philco 37-116 Restore
Hope you guys are still with me. I have moved on to the alignment. I completed the IF alignment which was pretty muc...dconant — 10:47 AM
My Philco 37-116 Restore
Hello MrFixr55, Thank you for taking the time to explain. I measured 50 volts where you say. Today the 370 volts at ...dconant — 12:51 PM
462ron
Oh that sucks. It’s something easily overlooked. Hopefully it’s nothing more than a resistor! Ron462ron — 08:08 AM
Philco 46-480 Electronic Restoration
Just confirmed that you are correct. It’s the function generator. I connected the signal output probe to one of the inpu...jrblasde — 07:52 AM
Philco 46-480 Electronic Restoration
Ouch, you may be right. Yes, it is solid state. It’s the signal output of my oscilloscope. May be time to crack that ...jrblasde — 07:27 AM
462ron
If you didn’t put a DC blocking cap between the signal generator probe and the plate of the 1st IF it’s possible you ble...462ron — 07:07 AM
My Philco 37-116 Restore
Hi DConnant, The reason why C127 is isolated from ground is because sets of this vintage did not have the center tap...MrFixr55 — 01:07 AM
Philco 46-480 Electronic Restoration
The shield is on the 6H6. It was, in fact, a missing jumper to connect the main chassis ground to the RF chassis grou...jrblasde — 10:58 PM

[-]
Who's Online
There are currently 1023 online users. [Complete List]
» 1 Member(s) | 1022 Guest(s)
Avatar

>