Integrating the VIC-1 with other equipment

Integration

Integrating the VIC 1 with other equipment is quite easy really.. there are some common connections that can be used. the biggest worry here will be to isolate the 12 volt radios and the 24 volt vic1, you cant simply hook these things together and expect them to not fry one another.

NOTE: One very important thing to note is that the VIC1 is 24 Volt and most Civilian radios are 12 Volt, you need to isolate them from each other if they are on connected to the system.

There are some common things that people want to do...

1. Hook up a FM radio, Satellite receiver, scanner, ipod, or other MP3 player. RX (receive) ONLY
2. Hook up a Transceiver, like a CB, FRS/GMRS radio, Ham Radios etc. This is TX (Transmit) / RX

Receive Only Inputs

Using the "Audio Input or "Tele / Remote" Inputs

You can make a simple pigtail from an old set of headphones and wire your ipod straight to these jacks.

Audio Input Jacks (left side)

These are amplified and will give you more input volume

Audio Ground (ring) connector to GND

Tip to the other

Tel/Remote jacks (right side)

These are 600ohm input sources for other military gear, these will be too low for use in most cases

Using the J508 Power Jack

To integrate something that is RX only, the best thing to do is to use the J508 4 pin power jack. Although this is a power input when the intercom is in Internal (no military radio hooked up) mode, this is NOT used when a MT-1029 is on the system. This is because the VIC1 will get its power from the radio mount on J501 or J503. This plug doubles as an RX input source.

To hook up an input source simply use this hookup

NOTES: - Need to verify the impedance of T-1 to insure proper matching, this is really here for unity and to maintain isolation

To use the circuit above you simply need to provide audio to the audio inputs from a line-out source on the radio. Line out is desired because it is usually quite low, and a fixed level, you want the Vic1 to do the amplification. You could use a speaker out, but you need to be very careful not to give it too much volume, the VIC1 wont react well, it will clip (sound distorted) and overdrive the amp. I do use the same circuit above to plug in my ipod and it works perfectly as long as the volume is reasonable. You wont smoke it as along as your not attempting to slam 300 watts from an amp into it.

Transmit and Receive inputs

This is a much harder situation, as i stated before you cant simply start splicing things together to get this going, you will certainly smoke a radio. You need to isolate the audio in and out and the PTT key circuits from each other. fortunately there is a fairly straightforward method to do this.

SEE AM-1780 for Jack details

TX / RX

J501 or J503 must be used, they use the CX-4723 - 18 Pin Cable.

RX only

J508 or J510

Common integration Diagrams

Proper Isolated Interface for 12volt radios to Intercom with TX and RX

Civilian Radio Connections to A (J501) or C (J503)

Civilian Radio Connection to C-RX (J508)

Nokia Style headset Connection to A (J501) or C (J503)

Kenwood HT Connections to A (J501) or C (J503)

Example of My integration

These are some photos of my integration of the VIC1 with civilian radios, i used the circuit defined in Properly Hook Civilian Radio to VIC1

ProtoType circuit and additional wiring.

This uses the 18 Pin "C" Radio integration for full transmit and receive support. the DB9 plug is so that i can easily hook to many different radios that i have put a "pigtail" DB9 in.

This is one of the radios. In this case its a EF Johnson, business band radio, programmed with the GMRS/FRS frequency set.

Updated Circuit Boards / Designs

I have created a Circuit board that will make this much cleaner and neater. This board is designed to be used alone with a single radio, or grouped together by means of a link board. the point here is that you can have up to 4 radio in one system, and be able to choose which radio will be keyed when you activate the PTT on the VIC1. In a certain configuration, you can key ALL THE RADIOS at once! now thats fun!

RIB Layout

Here is an early layout of the board.

this board is about 2in wide by 3 inches long..

A few Design Details

12v Sense - This allows the Remote PTT selector to indicate if the radio is plugged into the link board port, not needed if its used in a single radio configuration

PTT Cutoff / Enable - this allows you to disable PTT for this radio completely, this is good if you want an RX only radio, with no chance to transmit on it.

PTT indicator, this will light up when the radio is keyed

Receive resistor bypass, in some cases the resistor is needed to prevent overloading the input, like when you use a speaker out from the radio, use this jumper if your using a lower volume output from the radio

the two Blue pots control the receive the transmit audio levels.

Link Board

The link board allows you to run up to 4 radios into one vic. This one pictured does not have the PTT control port connector yet, that will allow you to select by a remote selector which radio will be keyed when you PTT from the vic. If you decide not to use the remote, you have to select the PTT radio manually by the small DIP switch. This would be done in advance. I know not very practical on the road, but thats why it has a remote selector. As an added bonus, you can actually allow it to key more than one radio at a time, by turning the PTT for multiple radios on. this of it! key all 4 radios at once!! sweet! (why you would want to is anyones guess, but hey, its still cool!)