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

Philco 80 different components
#1

In the diagram 80 Philco pin 4 of the second valve 36 is grounded. 

In my Philco is connected to ground, so it also has a resistor and capacitor to the central terminal of the oscillator coil. 

I've seen some pictures where also other devices have that connection. 

The connection of the resistor and capacitor is correct ?. A which is due ?. 

Thank you.

[Image: http://s3.postimg.org/jkheaeg5f/106_1.jpg]

subirimagenes
#2

It appears to be parts 5 and 6 as per the diagram. Your fine.
Terry 

http://www.nostalgiaair.org/PagesByModel...013843.pdf
#3

Thank you for your attention.
#4

You may want to measure the resistance from the unground side of the resistor to the cathode pin of the mixer tube. This will tell you if you will need to rewind the feedback section of the osc  coil.
To check ant coil unplug set turn on with the volume control all the way up (loudest). Measure resistance from the ANT post to gnd post. Both osc and ant coil should read 10 ohms of less. If higher it's time to break out the magnet wire.
Terry
#5

The question is that the terminal 4 is connected to ground, the scheme does not go directly to ground, it first goes to the coil, then the resistor and capacitor and finally to ground.
#6

The 36 tube that is connected to the coil is the mixer, the one with the grounded cathode is the detector tube.
Terry




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
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
Delco car radio Peko vibrator converstion issues
How about putting a choke in the power supply? The big cap was likely an attempt to stabilize the DC. Kids who cre...MrFixr55 — 09:19 PM

[-]
Who's Online
There are currently 3538 online users. [Complete List]
» 2 Member(s) | 3536 Guest(s)
AvatarAvatar

>