Sorensen QRD 20-4 Laboratory Grade DC Power Supply Made in USA

Description

Sorensen QRD 20-4 Laboratory Grade DC Power Supply Made in USA
Model:  QRD 20-4
Sale:
.99
+.99 Ground Shipping to 48 contingent US states
Product Description:
Completely Refurbished  -- see
NOTES
below for services performed
Tested/ Inspected: Excellent Working Condition with calibration using the factory procedures in the service manual
Nice overall cosmetic condition for its age --  some light scuffs, marks and other imperfections
Exactly as seen in the pictures -- a nice, heavy duty, made in the USA power supply for home, shop, or lab use
NOTES:
1. Replaced defective and marginal transistors with new
2. Replaced defective capacitors and resistors with new
3. Replaced Neon power indicator lamp with new
4. Cleaned meter switch and voltage and current controls
5. Verified greater than 20 VDC output
6. Verified 4 A DC output
7. Repaired voltage and current limiting circuits and verified operation
8. Calibrated current meter to current output within a couple percent (see picture)
9. Calibrated voltage meter to within 10% to rated output of 20 VDC
10. Checked programming function with connections on the rear (wired remote control with control voltages)
11. Checked all internal test point voltages and adjusted internal reference voltages