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Supreme 450 set tester schematic
daveone23
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#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.


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DaleHCook
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#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/
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daveone23
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#3

08-21-2024, 10:11 AM
No, I just used a DMM and checked continuity.
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morzh
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#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.
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DaleHCook
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#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.)
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daveone23
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#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.


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Chas
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#7

08-22-2024, 11:24 AM
Current shunt, covered with an asbestos braid tube. Probably a custom value...
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