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Help with schematic
martinj
Junior Member
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Posts: 7
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Joined: Jul 2023
City: Riverside State, Province, Country: ca
#1

Yesterday, 09:05 PM
Having trouble reading this schematic. EMC 300 meter and the ac does not work.


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DaleHCook
Philco, Zenith, and Howard Phan
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Posts: 171
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City: Roanoke State, Province, Country: Virginia
#2

4 hours ago
What part are you having trouble reading?
Dale H. Cook, GR/HP/Tek Collector, Roanoke/Lynchburg, VA
https://plymouthcolony.net/starcity/radios/
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martinj
Junior Member
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Posts: 7
Threads: 4
Joined: Jul 2023
City: Riverside State, Province, Country: ca
#3

52 minutes ago
The dc+ is void for 3v scale. Thats what thru me off. Also you need the batteries for the ac operation.
AC is perfect....
1. DC+ is off, 2.9vdc may measure 5vdc but its off on a curve so 4vdc goes full scale on 10v scale
2. DC- is backwards. Meter sets ok or full right but on negative voltage it tries to keep going right vs coming back down. Switching the leeds , the measurement is off.
3. Ohms wont go to standing full scale. There is no ohms adjust just zero adjust and it does nothing.
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  1. The PHILCO Phorum
  2. Various and Sundry Categories
  3. Test Equipment