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

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

37-690 Alignment
#1

The IF's aligned easily, except for this step where it appears you are expected to get two peaks on either side of the IF freq. That just doesn't  happen, and I'm not sure how it ever would unless I'm misunderstanding the instructions. My interpretation: "adjust signal generator back and forth between 460 and 480, you should get equal 2 signal peaks, one at 465 and one at 475.  If you don't, adjust the primary padder of 94 left and right of peak until you do".  I can wrench on that padder all day long and never get anything other than a single peak at the 470 IF.  Any thoughts as to what I'm doing wrong?
           

RJ Dial
"Radiodial"
Mendocino, CA
#2

The coils have probably degraded, holding corrosion and moisture and your won't get that double high fidelity peak. Make sure your sig gen and hookups are in good shape and not causing it. Old test leads that have bad connections in the alligator clips can mess it up, leading you down the wrong path. Clean the fidelity contriol also.
#3

I got the double peak alignment part to work by:
1- Discovered that "Fidelity control in expanded position" means turn the Selectivity/Treble control Counter-Clockwise.
2- Wearing hearing protection and increasing the volume to full and setting the signal generator output to high.
The other key was all it takes is minuscule adjustments on the 94P coil, and sure enough, you are able to get dual peaks 5khz eeither side of the 470 khz IF.

RJ Dial
"Radiodial"
Mendocino, CA




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
1949 Motorola 5A9M
This would be the second portable in the "other radios" forum where I have a similar one in my collection. I h...Arran — 12:41 AM
Looking for any info: 1977 Ford-Philco Console Hi-Fi Turntable and Radio
Hi PittsburgTost. The record changer looks like a Garrard or BSR (Likely Garrard). The spindles just pull out and pu...MrFixr55 — 11:57 PM
Looking for any info: 1977 Ford-Philco Console Hi-Fi Turntable and Radio
Hello PittsburghToast , Welcome aboard and it looks like gary may have something for you ! now if I dig through my se...radiorich — 11:35 PM
Model 80 Antenna Issue?
You are kind of on the right path. You can touch the grid cap of the Detector/Oscillator 36 tube. I'm expecting a respon...RodB — 08:48 PM
Looking for any info: 1977 Ford-Philco Console Hi-Fi Turntable and Radio
Welcome to the Phorum, PittsburghToast!  I found an old thread that my interest you regarding the quality and worth of P...GarySP — 08:48 PM
Looking for any info: 1977 Ford-Philco Console Hi-Fi Turntable and Radio
Welcome to the Phorum! :wave: We do not have anything on that unit in our digital library. There is a Sam's Photof...klondike98 — 08:47 PM
Model 80 Antenna Issue?
I’ve replaced all the caps and resistors and the radio is working but minimal volume unless I put my hand near the re...Hamilton — 08:24 PM
Looking for any info: 1977 Ford-Philco Console Hi-Fi Turntable and Radio
Hi there! this is my first time posting. I recently picked up this Ford-Philco Console record player and radio at a yard...PittsburghToast — 07:28 PM
philco predicta
I found that where I have the 140v B+ there is 50v and the tuner receives 235v through the orange cablecgl18 — 04:14 PM
Philco 91 code 221
Chassis grounds thru rivets is another good place to look. Oh and the stator screws on the tuning cap where the leads at...Radioroslyn — 08:11 AM

[-]
Who's Online
There are currently 338 online users. [Complete List]
» 1 Member(s) | 337 Guest(s)
Avatar

>