IT-PRC-247A

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Contents

Overview

The PRC-247A is the major component of the radiostation GRC-247A and VRC-247A.
They are intended for vehicular or ground installation, with the addition of an external power amplifier the output power is 100W instead of the normal 20W pep.
These sets were built by the italian firm IRET (Industria Radio Eelettrica Telecomunicazioni) and used by the spanish army.
The built-in manual antenna coupler can resonate a whip antenna of about 4 meters

Specifications

Frequency range
2.000 to 29.999 mc in 0.1 kc steps.
Frequency standard stability
1.0 parts/million.
Intermediate frequency
65 Mhz Ist IF, 5Mhz 2nd IF.
Operating temperature range
-25°C to +55°C
Operating mode
A3J (LSB-USB)
A3H (LSB)USB) AM compatibility
A1 (LSB-USB) CW 1000Hz shifted

Transmitter performance:

High power output
A3J A1 20W pep A3H, 5W carrier.
Low power output
1/10 of high power
Monitor sidetone
Voice or tone as determined by modulation mode.
Tuning indicator
Meter.

Receiver performance:

Sensitivity
A3J A1 1 microvolt for 10 db, signal plus noise to noise
A3H 2.5 microvolt for 10db S+N/N
Selectivity
A3J A1 -6 db 3000Hz, -60 db 5,500 Hz.
A3H -6 db 6000 -60 db 15000Hz
Audio output
2 mw minimum into a 300-ohm headset
1W into 50 Ohm loudspeaker
Input power
6W average @28Vdc

Reference Files

PRC-247A

Adobe PDF icon.png TM200-GRC-VRC-B

INSTRUCTIONS MANUAL
HF-SSB TRANSCEIVER
GRC-247/ VRC-247/A
NOVEMBER 1973