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

Another model 89 Radio from h**L…. Help!
#1
Photo 

Another model 89 Radio from h**L…. Help!
I am looking for advice.
I have started on a philco model 89 code 121  It has a 36 tube for the oscillator circuit.  The first coil checked  (Input to the RF amp ) has an open primary, photo attached.  What is the best way to approach this?  It appears that I will have to cut The coil out from the cylinder, rewind it and glue it back in.
I could also use a decent schematic as the Riders schematic is very poor. Does anyone know where I can find one

I can use advice from  anyone who has done this repair.  Does anyone know the impedance , # of windings , wire size or resistance of this coil?
Thanks


Attached Files Image(s)
   
#2

Hello. If you have a Djvu reader on the computer you can download the schematic from here.
http://www.audiophool.com/Philco.html
It's a lot clearer than the one you mentioned.
#3

Or...

just look within this Phorum for the schematic in the Tech Section.

http://philcoradio.com/phorum/showthread.php?tid=16721

Also not to be missed (but people do miss it, for some reason) is the Evolution of the Philco Model 89 page here on the Phorum, which discussed the many changes to Model 89 over its three and a half year production run.

--
Ron Ramirez
Ferdinand IN
#4

Thanks KCmike and Ron
Very helpful info. I can actually read these schematics.
Following the changes to this model is going to be a chllange
#5

    [

Finally finished the Philco model 89.  Thanks for all the advice.
It was a challenge following the schematics. 
Appeared to be a combination of two different schematics.
Had to rewind the primary of L2.  It wasn’t pretty but it works.
Nasty winding that much fragile wire on such a small spool.


Attached Files Image(s)
               




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 1035 online users. [Complete List]
» 1 Member(s) | 1034 Guest(s)
Avatar

>