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GENERAL PURPOSE COMMUNICATIONS RECEIVER
MODEL AR-88
TECHNICAL SUMMARY
Electrical Characteristics
Frequency Range--total 6 bands ......... , ............ , ......... , .................... 535 to 32,000 lee
Band 1 ....................•••..••....•..•..••. , ......•.....•........••
~. "'~
... 535 to 1,600
kc
Band 2 ......................•..••..•.............•................•. , .•.•.... 1,570 to 4,5;0 ke.
Band 3., .........•...........•.......••..•..•.••......•.•...........••....... 4,.SO to 12,150
kc',
Band 4 .....................••....•.•..........•....•...........•... ,.: ...... 11,900 to 16,600
,kc'
Band 5 ..................................................................... 16,100
t~
22,700
~c
Band 6 .......................•.............•.......................•...... " 22,000 to 32,000
KC
Maximum Undistorted Output-app~ximate-2. 5
watts
Power Supply' Requirements
Line Rating .......................... 100-117, 117-135, 135-165, 190-230, 200-260 volts, 50/60 cycles.
or Batteries. '" .............................. '"
6 volt "A" battery and 250 to 3QO volt "B" battery.
or Vibrator Power Supply Unit ...............•.... MI-8319.
Tube Complement
R-F and I-P Amplifiers .......••.......•.....•...•..•..•..•.•.•••.••.•.•.....•.•• S'RCA·6SG7
1st Detector (converter) ......•............... ~ ........••.............•..... , ...• 1 RCA·6SA7
Oscillator ...........................•.... ' ................................... " • RCA-6]5
2nd Detector ................•....•.............. , .....• ' .•..........•........... 1 RCA·6H6
Noise Limiter ..............•.•...•....................•.•. ' . . . . . . • • . . • • • . . . . . . .• 1 RCA·6H6
A· F Amplifier ...............••..•.
~
• • • . . . . . . . . . . • . . . • • . . • . . . . • . . . . • . . . . • . • . . . .. • RCA·6S]7
Power Amplifier. . . . . . . . . . . . . • . . . . . . . . . . . . • . . . . . . . . . . • . . . . . . . . . . . . . . . • . . • . . . . . .• 1 RCA·6K6GT
Beat Frequency Oscillator .......•............•.•.•..•.••...•••.....•.•..•.......• ItllCA·6]5
Rectifier.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1 RCA·;Y3GT
V oltage Regulator . . . . . . . . . . . . • . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . . . . . • • • . . . . . . .. 1 RCA·
VR·.
50
*Output Impedance--2.5 ohms and 600 ohms.
Mechanical SpeciAcations
Overall Dimensions ..........•........... " ..•.• 1934 inches wide x 11 inches high x 1934 inches deep
*Receivers with Serial Nos, .below
oo~ooo
do not have the 600 ohm output.
TABLE 1-PERFORMANCE DATA
(Approximate Values - Taken on SampJe Receiver)
..
-
Sensitivity
Antenna Input
in
Antenna Input in
Band
in Microvolts Microvolts for 6 DB
Microvolts for 20 DB
Image
No.
Megacycles
for 0.5
watt
. Signal·Noise Ratio
Signal-Noise Ratio
Ratio
1
.6
.5
.9
4.6
Greater than
1,000.000
1.0
.9
1.4
8.0
1.5
1.0
2.2
12.0
1,000000
2
1.7
.6
1.0
5.0
240,000
3.0
.6
.95
4.8
4.3
.6
.9
4.5
14.100
3
4,6
.8
1.3
8.0
60,000
8.0
.8
1.2
6.8
11.5
.7
1.1
6,0
2,000
4
12.1
1.2
1.3
6.6
4,000
16.4
.7
1.2
7.0
1,;00
5
16.4
1.1
1.3
7.0
1,000
22';'
.8
1.4
8.0
-
..
~OO
6
22.5
2.5
1.5
8.0
400
28.0
1.2
1.3
7.0
200
I·F rejection at 600 kc is 100,000.
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