Collins AN/ASQ-19

UNDER CONSTRUCTION

RT-793/ASQ
(Part of AN/ASQ-19 & AN/ASQ-88)

How to get it working with a 115V 3Ph 400 Hz supply.

1) Connectors

Connectors for the control head
MS3116-18-32-S-W
(Note: W means that the connector is rotated). The one showed here IS NOT rotated.

MS3115-20-41-S

**Connectors for the control head**
MS3116-18-32-S-W (Note: W means that the connector is rotated). The one showed here IS NOT rotated.
MS3115-20-41-S

The mating connector for the RT is unavailable or very expensive. It can be easily replaced with 2 DB-25s and an SMA for the antenna. I suggest to connect the two DB-25 to FL-1. To avoid confusion, the DB-25 male will be called DJ-1 and the female DP-1.

Can't find the MS3116 connectors? Let me know and I'll try to help you out.

2) Wiring

**Wiring List**
Signal	Control Head	RT-793 FL1	RT-793 DB-25s
200/300 MHz	J1-Z	FL1-44	DP-19
10 MHz BCD 8	J1-Y	FL1-31	DP-10
10 MHz BCD 4	J1-X	FL1-54	DP-25
10 MHz BCD 2	J1-L	FL1-43	DP-18
10 MHz BCD 1	J1-K	FL1-33	DJ-14
1 MHz BCD 8	J1-J	FL1-26	DP-5
1 MHz BCD 4	J1-H	FL1-27	DP-6
1 MHz BCD 2	J1-G	FL1-28	DP-7
1 MHz BCD 1	J1-F	FL1-29	DP-8
0.1 MHz BCD 8	J1-E	FL1-39	DP-14
0.1 MHz BCD 4	J1-D	FL1-40	DP-15
0.1 MHz BCD 2	J1-C	FL1-41	DP-16
0.1 MHz BCD 1	J1-B	FL1-42	DP-17
0.00/0.05 MHz	J1-A	FL1-32	DP-11
+28VDC	J1-u
115V Ph A		FL1-4	DJ-8
115V Ph B		FL1-6	DJ-7
115V Ph C		FL1-8	DJ-6
+28VDC	J1-W
+28VDC	J2-W
Audio Output to 600 ohm speaker	J1-P
On/Off	J2-D	FL1-20	DJ-20
On/Off Return	J2-Y	GND	DJ-4
Guard On/Off	J2-X	FL1-21	DJ-19
Guard On/Off return	J2-A	GND	DJ-2
Audio In	J1-N	FL1-35	DP-3
Audio Out (to speaker 600 ohm)	J1-j
Audio Out (to speaker 600 ohm GND)	J1-P
Squelch Disable	J2-a	FL1-48	DP-22
Squelch Disable Return	J2-y
Jumper	J2-N and J2-c
GND	J1-M	GND	DP-12
	J1-e	GND	DP-13
	J2-W
	J2-d	FL1-12	DJ-11
	J1-r	FL1-12	DJ-12
+28VDC		FL1-12	DJ-10
		FL1-1	DJ-9
		FL1-9	DJ-24
		FL1-10	DJ-25
		FL1-11	DJ-13
		FL1-17	DJ-23
		FL1-18	DJ-22
		FL1-19	DJ-21
		FL1-22	DJ-18
		FL1-23	DJ-17
		FL1-24	DJ-16
		FL1-24	DP-4
		FL1-30	DP-9
		FL1-34	DJ-15
		FL1-36	DP-2
		FL1-38	DP-1
		FL1-45	DP-20
		FL1-46	DP-21
		FL1-49	DP-23
		FL1-53	DP-24
		GND	DJ-1
		GND	DJ-3
		GND	DJ-5

3) Smoke test (without modules)

**Voltage Reference Chart**
28 VDC	J12-11, J8-1, J10-1, J10-11, J10-12, J5-8, J4-8, J7-3, J6-8, J6-11, J2-6, J2-9, J3-5, J3-11
6.6 VDC	J5-1, J5-3, J5-6, J6-1, J1-7
13.7 VDC	J5-7, J6-3, J6-13
20.7 VDC	J6-4
220 VDC	J5-4, J6-2, J6-5, J1-3
-6 VDC	J6-6

Notes:
1)Voltages are measured without any module plugged in.
2)Measured voltages maybe higher
3)28VDC is present on J7-3 only when Guard Channel is turned on.

**Converter Frequency Static & Mechanical Tuner Reference Table**
Signal	Connector Converter Frequency Static J-12	Connector Mechanical Tuner J-10
10 MHz BCD 8 Input	J12-12 (input)
10 MHz BCD 4 Input	J12-13 (input)
10 MHz BCD 2 Input	J12-14 (input)
10 MHz BCD 1 Input	J12-15 (input)
1 MHz BCD 8 Input	J12-6 (input)
1 MHz BCD 4 Input	J12-7 (input)
1 MHz BCD 2 Input	J12-8 (input)
1 MHz BCD 1 Input	J12-9 (input)
0.1 MHz BCD 8 Input	J12-1 (input)
0.1 MHz BCD 4 Input	J12-2 (input)
0.1 MHz BCD 2 Input	J12-3 (input)
0.1 MHz BCD 1 Input	J12-4 (input)
300-A		J10-8 (input)
200-B	J12-36 (output)	J10-2 (input)
10-E	J12-34 (output)	J10-5 (input)
10-D	J12-33 (output)	J10-4 (input)
10-C	J12-32 (output)	J10-3 (input)
10-B	J12-31 (output)	J10-7 (input)
10-A	J12-30 (output)	J10-6 (input)
1-E	J12-29 (output)	J10-10 (input)
1-D	J12-28 (output)	J10-9 (input)
1-C	J12-27 (output)	J10- (input)
1-B	J12- (output)	J10- (input)
1-A	J12-25 (output)	J10- (input)
0.1-E	J12-24 (output)	J10-23 (input)
0.1-D	J12-23 (output)	J10-21 (input)
0.1-C	J12-22 (output)	J10-20 (input)
0.1-B	J12-21 (output)	J10-19 (input)
0.1-A	J12-20 (output)	J10-18 (input)

**Tuning Reference Table**
Signal	Control Head	RT-793 FL1	RT-793 Modules
200/300 MHz	J1-Z	FL1-	J12-17
10 MHz BCD 8	J1-Y	FL1-	J12-12
10 MHz BCD 4	J1-X	FL1-	J12-13
10 MHz BCD 2	J1-L	FL1-	J12-14
10 MHz BCD 1	J1-K	FL1-	J12-15
1 MHz BCD 8	J1-J	FL1-	J12-6
1 MHz BCD 4	J1-H	FL1-	J12-7
1 MHz BCD 2	J1-G	FL1-	J12-8
1 MHz BCD 1	J1-F	FL1-	J12-9
0.1 MHz BCD 8	J1-E	FL1-	J12-1
0.1 MHz BCD 4	J1-D	FL1-	J12-2
0.1 MHz BCD 2	J1-C	FL1-	J12-3
0.1 MHz BCD 1	J1-B	FL1-	J12-4
0.00/0.05 MHz	J1-A	FL1-32	J2-10

**Power Supply A8**
J8-1
J8-2
J8-3	Output	-12VDC
J8-4	Output	220 VDC
J8-5
J8-6	Output	-6VDC
J8-7
J8-8	Output	460VDC	Not required **
J8-9		GND
J8-10
J8-11	Input	115V 400Hz Ph 1
J8-12	Input	115V 400Hz Ph 2
J8-13
J8-14	Input	115V 400Hz Ph 3
J8-15		Return	GND

** 460VDC is not required for receiver only operation.

Similarities and Differences Between the ARC-51BX and RT-793 The AN/ARC-51BX utilizes some modules that seem to be functionally equivalent to the one used on the RT-793.

The 51BX does not utilize the Converter Frequency Static, since the control head interfaces directly to the Mechanical Tuner.

The 51BX Power Supply A8 is not compatible without major modifications of the RT-793 mainframe. Utilizing the ARC-51 power supply module has the advantage of requiring one supply voltage only (28VDC). This modification will be discussed at a later time.

Last update May 12, 2001

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