Production Devices Model 120 Step Frequency Generator Schematic and Operating Instructions.

Owners manual for Radio Shack / Micronta 22-216 Auto Ranging Analog Meter.

I took the manual originally posted on this by Charles Longfellow (Cl...

This is a schematic of the Radio Shack 13.8VDC 25A switching power supply drawn by tracing the wiring from an actual unit (reverse-engineered).

Radio Shack 22-510 Power Supply PC Board layout

Parts list for the Radio Shack 22-510 power supply

Frequency Counter Ramsey CT-50 from circa 1977

Frequency Counter

Schematic Diagram of Radio Shack Realistic SA-10 Audio Amplifier.  I use this on my test bench so I put it under test equipment.  Probably should...

oscilloscope

RFT EO211

also marketed as VOLTCRAFT 1010

SPL Meter Manual german w/o schematic

Schaevitz-MCD Pocketscope S-14-A

SECO 500 Crystal Tester

Operating Manual for Shibasoku 725B Audio Analyzer. Does not include schematics.

Schematic diagrams for Shibasoku 725B Audio Analyzer.

Simpson 330 Tube Tester Manual and Tube Data, schematic with transformer tap voltages.

Simpson 330 Tube Tester Calibration

1966 version of the Operator's Manual for the Simpson Model 383A Capacohmeter. Most other scans on the net are of the 1956 version, which has a dif...

THIS IS AN OPERATOR'S MANUAL INCLUDING SCHEMATIC FOR A SIMPSON 383A IN CIRCUIT CAPACITOR TESTER