1. The PHILCO Phorum
  2. Various and Sundry Categories
  3. Test Equipment

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

Threaded Mode
Supreme 450 set tester schematic
daveone23
Member
***
Posts: 96
Threads: 20
Joined: Jun 2024
City: tampa State, Province, Country: florida
#1

08-20-2024, 06:42 PM
Iam trying to figure out why these pin sockets are shown as diodes on the schematic. They have continuity.


Attached Files Image(s)
           
.pdf supreme450-schm-2.pdf Size: 296.38 KB  Downloads: 76
Find
DaleHCook
Philco, Zenith, and Howard Phan
***
Posts: 182
Threads: 8
Joined: Apr 2023
City: Roanoke State, Province, Country: Virginia
#2

08-21-2024, 09:02 AM
Did you check them with a low-voltage variable supply to see if they have diode knees?
Dale H. Cook, GR/HP/Tek Collector, Roanoke/Lynchburg, VA
https://plymouthcolony.net/starcity/radios/
Website Find
daveone23
Member
***
Posts: 96
Threads: 20
Joined: Jun 2024
City: tampa State, Province, Country: florida
#3

08-21-2024, 10:11 AM
No, I just used a DMM and checked continuity.
Find
morzh
Odobenus rosmarus
******
Posts: 16,476
Threads: 573
Joined: Oct 2011
City: Jackson State, Province, Country: NJ
#4

08-21-2024, 10:23 AM
I am not sure diodes were manufactured and used at the time that tester was being built.
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
Find
DaleHCook
Philco, Zenith, and Howard Phan
***
Posts: 182
Threads: 8
Joined: Apr 2023
City: Roanoke State, Province, Country: Virginia
#5

08-21-2024, 02:55 PM
Copper-oxide diodes existed at that time. I own a Triplett 1167-A set tester ca. 1935 which uses a small copper-oxide stack as the voltmeter rectifier for measuring AC. I doubt that is what is shown on the schematic, though.
Dale H. Cook, GR/HP/Tek Collector, Roanoke/Lynchburg, VA
https://plymouthcolony.net/starcity/radios/
(This post was last modified: 08-21-2024, 02:58 PM by DaleHCook.)
Website Find
daveone23
Member
***
Posts: 96
Threads: 20
Joined: Jun 2024
City: tampa State, Province, Country: florida
#6

08-21-2024, 07:27 PM
What does this look like. Its soft like a wire and has continuity. Both sides go to the ohms jack.


Attached Files Image(s)
   
Find
Chas
Senior Member
****
Posts: 713
Threads: 8
Joined: Apr 2018
City: S. Dartmouth State, Province, Country: MA
#7

08-22-2024, 11:24 AM
Current shunt, covered with an asbestos braid tube. Probably a custom value...
Pliny the younger
“nihil novum nihil varium nihil quod non semel spectasse sufficiat”
Find
« Next Oldest | Next Newest »




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
Philco 42-345 Restoration/Repair
Today I've been reading through the site trying to learn more about this radio. I also soldered the lose power cord cabl...osanders0311 — 08:24 PM
Philco 610B oscillator wiring
Thanks David! I do have that same later prodution model 610 schematic. I've also studied the Philco service bulletins fo...Tubester — 08:12 PM
Philco 610B oscillator wiring
Some info from Beitmans says late production. David   David — 06:06 PM
Restoring Philco 96
Oh wow! Just found this thread.  Brings me back to early days on this phorum.  I did a 96 back in 2017.  Thread here: ...rfeenstra — 06:05 PM
Philco 610B oscillator wiring
Thanks for the replies. It's not the really the hum that I am after. Just trying to understand why only the shortwave ba...Tubester — 04:01 PM
Restoring Philco 96
70 and 90 are Superhets, but at least the 2x45 model of 90 uses the Plate detector (and so does 70). Also the Atwaters,...morzh — 03:28 PM
Restoring Philco 96
Morzh, Prayers for your mom. I am sure that there was enough pain living through the Holocaust as a child. I pray dail...MrFixr55 — 02:19 PM
Philco 610B oscillator wiring
Hi Dan, Divide and conquer. First off trry to differentiate between 60Hz and 120 Hz hum. 120 Hz hum has a higher pit...MrFixr55 — 01:49 PM
Restoring Philco 96
Yes, other than takin a toll on your back, they are undeed way more repair friendly than many other Philcos. To me, som...morzh — 01:04 PM
Philco 610B oscillator wiring
If the wires look like they were this way from the factory (very neat and very dull soldering joints), I'd leave them be...morzh — 12:58 PM

[-]
Who's Online
There are currently 2864 online users. [Complete List]
» 1 Member(s) | 2863 Guest(s)
Avatar

>
  1. The PHILCO Phorum
  2. Various and Sundry Categories
  3. Test Equipment