SG-15/PCM

From RadioNerds
Jump to navigation Jump to search

Overview

The range of frequency is generated in only one band, from 20 to 35000 Hz.
The method of generation is different from other signal generators:
the variable frequency oscillator operates from 100 to 135 Khz, its output is beated with a fixed oscillator of 100 Khz in a mixer
the output of which, filtered and amplified, is the signal at the output connector.
The output is relatively a low distortion one due to the method of generation,
and a high level one with the push-pull final amplifier, two 6V6.

In the model SG-15A for the fixed oscillator is used a xtal oscillator, instead of the LC of the SG-15

Images

Relationship to Similar Equipment

This equipment, with the signal generator ME-22/PCM, is part of Telephone Test Set TS-140/PCM.

Technical Description

Power Requirements
50 w, 115 or 230 v ±10%, 50 to 70 cy, 1 phase ac
Frequency Range
200 to 35,000 cy
Frequency accuracy
+- 10 cps from 200 to 1000 cps, +-20 cps from 1000 to 2000 cps, +-50 from 2000 to 35000 cps
Impedance
600 ohms
Power output
-45 to +26 dbm +- 0.5 db
Major Unit
SG-15/PMC 19"w 13"d 8 3/4" h; 52 lbs
Carring case
CY-712/PCM 21 1/8"w 16 d 12 1/4 h; 30 lbs

Tubes, Crystals, Transistors

SG-15/PCM

  • 3 - 6J5
  • 1 - 6SL7GT
  • 2 - 6V6GTY
  • 2 - 6SJ7
  • 1 - 6SA7Y
  • 1 - 6SQ7
  • 1 - 0C3/VR105
  • 1 - 6L6GAY
  • 1 - 5Y3GT

SG-15A/PCM

  • 1 - 6SN7
  • 2 - 6J5
  • 1 - 6SL7GT
  • 2 - 6V6GTY
  • 2 - 6SJ7
  • 1 - 6SA7Y
  • 1 - 6SQ7
  • 1 - 0C3/VR105
  • 1 - 6L6GAY
  • 1 - 5Y3GT

Reference Data and Literature

  1. TM 11-2096
  2. MIL-T-12643