Jackson Power Supply #607...No Low Voltages.???

[Dave P]

I just got a Jackson Model 607 Power Supply that my Father had in storage.
I plugged it in and found that the "Meter" (Low or High Voltage Setting) registers ONLY down to 144 VDC.
I cannot get any low voltages.
The Voltages from the 144VDC to 380VDC Checks out good on my Multi-Meter.
All of the Tubes check "Good" on my Sencore TC-162 Tube Tester.
Would anyone have any ideas as to where to start to try and Resolve this problem.???
Thanks in advance for any info or suggestions. !!!

Good Luck & Good Music...

oldave...