ASTATIC TIPS

ASTATIC Communication Microphones WIRING DIAGRAMS AND MORE!!

ECHO MAX 2000;

Mic Gain

The Mic Gain slider control sets the level of signal into the digital circuitry. This control should be adjusted so that the level indicated on the VU meter does not exceed "+3" on voice peaks. The setting of this control will vary depending on how far away from the microphone you speak.

Digital Delay

The Digital Delay control is used to adjust the delay time of the Echo and the Slapback echo effect. Setting the Digital Delay control to the center position turns off the echo effects. Turning the control counterclockwise activates the Echo effect and sets the echo delay time. Turning the control clockwise activates the Slapback echo effect and sets the slapback echo delay time. In either case, turning towards MAX increases the delay time.

Effects Gain

The Effects Gain control adjusts the volume of the Echo and the Slapback echo effects. Setting this control completely counterclockwise will act the same as turning off the effects. With this control set completely clockwise, the volume of Slapback and the first Echo repeat will be at maximum and sound almost as loud as the original sound picked up by the microphone. Adjust this control for the desired effects level. NOTE: Setting the Effects Gain too high when using long delay times will make continuous speech difficult to understand!

ETS - ON / OFF

This push button controls whether the End of Transmission Signal (ETS) tone is transmitted when the microphone is un-keyed.

ETS - Single / Multi

This push button selects either a single tone ETS or a multi-tone ETS.

Master Gain control

This control is labeled GAIN and is located on the rear panel of the microphone base near the gooseneck microphone. Use this control to set the overall level of the microphone. Start by setting the Mic Gain control as described above. Then adjust the Master Gain Control for 100% modulation on your radio.

Headphone Volume Control

Use to adjust the volume when using headphones or powered speakers. NOTE: The use of headphones will increase the battery drain and shorten battery life. We suggest that if you are planning to use headphones for long periods, you should use a plug in wall transformer instead of a battery. ASTATIC sells an accessory kit that includes a plug in wall transformer and a set of headphones. The ASTATIC part number is EM-KIT.

Detachable Cable

The high quality cable on the EchoMax 2000 is connected to the base with a modular connector the same as used on modern telephone systems. The cable can be removed by squeezing the top and bottom of the rubber boot on the cable. Additional cables can be purchased and fitted with different radio connectors. If you own more than one base station radio, this will allow you to easily connect the EchoMax 2000 to either radio. Order part number 43838-00-00.

Microphone Windscreen

The gooseneck microphone comes with a foam windscreen. The windscreen protects the microphone element and also helps eliminate popping when pronouncing p’s and b’s. The head of the microphone has a lip towards the back to ensure that the windscreen is properly positioned.

Installing and changing the battery:

The battery compartment is located on the back of the base. Open the cover by removing the screw with a standard screwdriver. Insert a standard 9 volt alkaline battery into the spring clip on the back of the battery door and connect the battery terminal clip. Replace the battery door using the screw previously removed. NOTE: If you are using a wall transformer instead of a battery, route the cable from the wall transformer through the slot provided in the battery door.

Connector Wiring

The EchoMax 2000 will operate with virtually all modern transceivers. If the microphone plug you have selected for your hookup requirements does not have a cable clamp suitable for our small diameter high quality microphone cable, use the tubing as supplied. Simply slide the tubing over the cable prior to soldering the leads to the connector. Position it to ensure proper clamping of the cable and tubing by the connector. The function of the cable wires and some common connector wiring schemes are shown below. If you have difficulty finding hookup information on a particular radio, you can contact ASTATIC for assistance.

Maintenance

If the housing of the EchoMax 2000 become soiled it can be cleaned by wiping with a damp cloth. The windscreen can be easily removed for cleaning with warm water and a mild detergent. Make sure that the windscreen is thoroughly dry before it is replaced. The head of the microphone has a lip towards the back to ensure that the windscreen is properly positioned. Replacement windscreens are available. Order part number 42577-00-00.

Connector Wiring:

WHITE - Audio
SHIELD - Ground
RED - Transmit control
BLUE OR BROWN - Switching common
BLACK - Receive control
YELLOW - Not Used

Common microphone plug wiring schemes:
4 PIN FEMALE PLUG WITH LOCKING RING:
COBRA, UNIDEN, EXPORT RADIOS

WHITE - PIN 2
SHIELD - PIN 1
BLUE OR BROWN - PIN 1
RED - PIN 3
BLACK - PIN 4
YELLOW - N/C

5 PIN DIN CONNECTOR:
COBRA, MIDLAND

WHITE - PIN 1
SHIELD - PIN 4
BLUE OR BROWN - PIN 4
RED - PIN 2
BLACK - PIN 5
YELLOW - N/C

5 PIN FEMALE PLUG WITH LOCKING RING:
COBRA, UNIDEN

WHITE - PIN 1
SHIELD - PIN 2
BLUE OR BROWN - PIN 4
RED - PIN 5
BLACK - PIN 3
YELLOW - N/C

D104 SERIES

Connector-Cable Clamping

If the microphone plug you have selected for your hookup requirements does not have a cable clamp suitable for our small diameter high quality microphone cable, use tubing as supplied by ASTATIC. Simply slip tubing over cable prior to soldering of lead wires. Position it to ensure proper clamping of cable and tubing by the connector.

Volume Adjustments

At a speaking distance of approximately 2 inches (or the position you prefer) starting with the external volume control set fully counterclockwise, adjust the volume control for the correct modulation level. Rotating the volume control clockwise increases the volume.

Over Modulation Warning

The combination of an amplified stand and a high level microphone may result in over modulation (tinny or hollow sound), overly sensitive gain adjustment, or a squeal when transmitting. One possible solution is to add an "L-PAD" as shown below using 1/4 or 1/2 watt resistors. Cut white wire from coil cord in base, solder 4.7K ohm and 470 ohm resistors to free ends of this white wire as shown.

Battery Replacement

Remove the bottom cover by removing the three screws. Carefully lift off the cover. Unsnap the battery from the battery connector and install a new battery. Carefully replace the bottom cover and fasten with the three screws previously removed.

Temperature Warning

Do NOT subject crystal microphones to temperatures over 45 degrees C, permanent damage may result.

ASTATIC Communication Microphones WIRING DIAGRAMS AND MORE!!