Free power supply

[Mike]

This is too heavy to bring to a junk sale but if anyone would like it you can collect it from my QTH in Woodley.

It's been in storage for several decades but it switches on. The fan runs and the voltage output on both ranges is correct. I haven't checked it under load and would advise caution before proceeding.

The specification is below courtesy of ChatGPT.

Regards

Mike G8GYW

Key Specifications — Farnell TSV70

Output Ranges

0 → 70 V at up to 5 A (ManualsLib)

0 → 35 V at up to 10 A (ManualsLib)

Voltage Adjustment

Coarse and fine controls on front panel for setting voltage continuously over each range. (Scribd)

Fine control resolution: approx 1 V / 10 mV, depending on range. (Scribd)

Current Limiting / Overload Protection

Uses adjustable constant-current limiting. (Scribd)

Current limit control is adjustable from zero up to ~5.5 A (on the 5 A range) or 11 A (on the 10 A range) (Scribd)

Meters

Dual-range analog meters:

Voltage meter: 35 V / 70 V full scale (ManualsLib)

Current meter: 5 A / 10 A full scale (ManualsLib)

The meter range switches automatically depending on the output range selected. (Scribd)

Remote Sensing

Provides sense terminals (“+ SENSE” and “– SENSE”) so you can compensate for voltage drop on the leads. (Scribd)

By default, sense and output terminals are linked, but links can be removed for 4-terminal (remote sense) operation. (Scribd)

Output On/Off Switch

Front-panel switch isolates the output from the load without turning off the mains power. (ManualsLib)

Useful for safely connecting or disconnecting the load while preserving your voltage/current settings. (ManualsLib)

Mains / Input

Operates from 50/60 Hz mains. (Scribd)

Input taps: 105–120 V or 210–240 V (selectable transformer tap) (Scribd)

Maximum mains variation tolerated: ±10% of nominal. (ManualsLib)

Regulation / Stability

Line regulation (change in output with mains variation): short-term less than 0.018% or 1 mV (whichever is greater). (ManualsLib)

Load regulation (change in output when load changes from 0 to full): short-term 0.01% or 1 mV (whichever is greater). (ManualsLib)

Long-term stability (8-hour): 0.05% or 5 mV (whichever is greater). (ManualsLib)

Ripple / Noise

Less than 1 mV p-p, measured with an 80 kHz bandwidth. (ManualsLib)

Over-Temperature Protection / Cooling

Forced-air (fan) cooling for regulator elements. (Scribd)

Thermal trip: if the temperature rises too much, a thermal trip shuts the output down; it resets when things cool. (Scribd)

Physical

Dimensions: ~ 430 mm wide × 410 mm deep × 177.8 mm high (from manual) (ManualsLib)

Weight: ~26.2 kg (ManualsLib)

Operating Temperature

Specified operating range: 0–40 °C (ManualsLib)