TS-629A/U

OVERVIEW

A portable general purpose test panel designed to accurately measure audio volume levels in broadcasting, sound recording, telephone transmission, and allied fields where precise monitoring over the audio range is required.

TECHNICAL DESCRIPTION:

Circuit Information

The input circuit consists of a shielded transformer. This is followed by an audio-amplifier, and the indicating meter. A thermal relay shorts out the meter for 20 seconds after power is applied to the built-in regulated supply to avoid damage due to surge voltages.

Power Supply

115 volts ±10%, ac, 50 to 60 cycles per second, single-phase, 15 watts ;Frequency Range:

30 to 15,000 cps

Audio Level Indicating Range

As a bridging type instrument: -20 to +20 db with a total range including meter scale of -40 to +23 db

As a terminating type instrument: -40 to +20 db with a total range including meter scale of -60 to +23 db

Meter Scale

-20 to +3 dbm

Reference Level

0 VU (1 mw into 600 ohms)

Input Impedance

Terminating Connection: 600 ohms

Bridging Connection: 12,500 ohms

Frequency Response

±0.1 db from 200 to 10,000 cps

±0.5 db from 30 to 15,000 cps

Accuracy

Overall: ±5%

From-15 to +10 db from 200 to 10,000 cps. ±1%

Temperature Range

-15° C. (+5° F.) to +55°C. (+131° F.)

Humidity Range

Up to 90%

Major Unit

TS429A/U 5 1/4" x 19" x 11"; 20 lbs

TUBES, CRYSTALS, TRANSISTORS:

• 1 - JAN-6AG7,
• 1 - JAN-6X5GT,
• 1 - JAN-OD3/VR-150



REFERENCE DATA AND LITERATURE:

NAVSHIPS 91900 (Instruction Book)

TO 33A1-10-29-1 (Instruction Book)

MIL-A-17045 (Ships) 21 February 1952