Help with Supreme 599 - Printable Version
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+--- Thread: Help with Supreme 599 (/showthread.php?tid=25838)
Help with Supreme 599 - daveone23 - 06-13-2025
This tube tester wont work to test tubes or center the needle but works on DC volts. I checked the line adjust rhehostat and it measures 270ohm. Schematic calls for 1000ohms. I dont really see when it connects to the rest of the circuit in the schematic. Where should I start tracing?
RE: Help with Supreme 599 - DaleHCook - 06-13-2025
The other end doesn't connect to anything - it is not being used as a potentiometer, it is being used as a rheostat.
RE: Help with Supreme 599 - daveone23 - 06-13-2025
I get that part of it. I moved the switch to the line adj position on the schematic. As you can see it goes no where.
RE: Help with Supreme 599 - DaleHCook - 06-13-2025
Now I understand. Your schematic has been altered. The original is on Steve Johnson's site at:
599, 599-C Schematic No. 2315-C (4/11/45)
RE: Help with Supreme 599 - daveone23 - 06-13-2025
Yes its been altered. I did that to
Show the switch is not in the A position.
Line adjust is another detent. Look at
Your link, you will see the other detent. Its
Shown in the A position.
RE: Help with Supreme 599 - DaleHCook - 06-13-2025
There seems to be something wrong with that schematic - in the Line Adjust position that 1k potentiometer should be in series with the meter. See the schematics for the similar 589 and 589-A testers.
RE: Help with Supreme 599 - daveone23 - 06-13-2025
Good catch. The 589 is a better schematic but i dont understand how the voltage goes thru the meter to adj the line voltage on the meter. I tested the 300ohm rheostat and while it ohms out the voltage is steady 118vac thru the adjustment.
RE: Help with Supreme 599 - daveone23 - 06-14-2025
I found a broken wire from the end og the 300 ohm line adjust to the transforner but i dont think its needed. The transformer is still getting line voltage.
RE: Help with Supreme 599 - daveone23 - 06-14-2025
Iam only getting 4vac out of the tranny
For the 80 filament. The line rheostat
Looks fine and the tranny is getting 116vac. Why does the line adjust show 133vac.
RE: Help with Supreme 599 - DaleHCook - 06-15-2025
The 300 ohm line adjustment is used to set the primary of the transformer to a nominal voltage for any line voltage from 100 to 130 volts. Although that nominal voltage does not seem to be specified in the manual it should be 115 or 120 volts.