VHF FM PORTABLE TRANSCEIVER MODEL: AE-144 N 1800 CHANNELS
The AE-144 N FM VHF portable radio is designed to meet the demands of your cost effective, reliable communications. A frequency synthesizer cicuit provides 1800 channelsat 5 KHz steps in the 140-MHz band. This radio uses heat resistant transistors. Current drainon 10.8 Volts DC is exceptionally low. Thisradio may also beoperated from AC when used with an optional power supply.
: 141,000-149,995 MHZ
: 5 KHz steps 1800 channels : 10 KHz steps 900 channels
: Digital PLL synthesizer with thumb wheel switches
: ± 1.5 KHz
: 50 Ohm
Current drain at 10.8 Volts
: Transmitting High 3 watts 550 mA nominal Low 0.15 watts 220 mA nominal Receiving At maximum audio output 130 mA nominal Squelched 20 mA nominal
RF output power
: High 3 watts, Low 0.15 watts
: variable reactance frequency modulation
Max. frequency diviation
: ± 5 KHz
: Мог than 60 dB below carrier
: Simplex Duplex ± 600 KHz from receive frequency
: Double-conversion superheterodyne
:1st IF 10.695 MHz : 2nd IF 455 KHz
: Less than 0.5 uV for 20 dB noise quieting
: Less than 0.4 uV
Audio output impedance
: 8 Ohms
OPERATING CONTROLS AND FEATURES
1. Antenna Connector
Connect the supplied flexible antenna. An external antenna can be used, using a BNC connector.
2. Transmit/Battery indicator
Illuminates in the transmit mode. Also indicates the battery condition, during transmission. The voltage of Nickel-Cadmium batteries drops rapidly just before they are exhausted, so when this indicator goes out, be sure to immediately stop using it, and charge the batteres again.
3. Squelch Control
Sets the squelch treshold level. To turn OFF the squelch function, rotate the control competely counterclockwise. To set the treshold level higher, rotate the control clockwise.
4. Volume Control (and Tone Call Switch)
Control the audio level in the receive mode. Clockwise rotation increases audio output.
Tone Call Switch
Most repeaters require a 1750 Hz Tone-burst for inital access. Depressing the VOLUME CONTROL knob for the required for a repeater, puts the set in the transmitt mode and the tone-burst generator actuates and you can access the repeater.
5. 5 Khz Shift Switch
When an desired operating frequency has a 5 KHz digit, set this switch in the +5 KHz position, and add 5 KHz to the indicated frequency on the thumbwheel switches.
6. Power Switch
The ON/OFF switch controls power to the set.
7. External MIC.JACK
When an external microphone is used, connect it to this jack. When the external mirophone is connected, the built-in microphone does not function.
8. External Speaker Jack
When an external speaker (or an earphone) is used, connect it to this jack. Use a speaker with an impedance of 8 Ohms. When the external speaker is connected the built-in speaker does not function.
9. 10 KHz Thumbwheel Switch
Sets 10 KHz digit of the desired operating frequency.
10. 100 KHz Thumbwheel Switch
Sets 100 KHz digit of the operating frequency.
11.1 MHz Thumbwheel Switch
Sets 1 MHz digit of the desired operating frequency. When you set a digit of a frequency that is out of the band, the set will work at some channels. But basically does not work.
12. RF Power Switch
Selects the RF output power HIGH 3 Watt or LOW 0.15 Watt. In the LOW position, the current drain is decreased, to prolong the battery life.
13. Duplex/Simplex Switch
Selects the operation mode DUPLEX for repeater operation, or SIMPLEX for the same receive/transmit frequency operation.
14. Duplex Mode Switch
In the DUPLEX mode, selects the transmitting frequency, 600 KHz above or below the receiving frequency according to the desired repeater input frequency.
15. Push to Talk (PTT) Switch
For transmission, press this switch and take into the microphone with normal voice. The internal microphone is of the electric-condenser type and provides good pickup for all voice levels.
16. Battery Pack and DC-Sockets
The radio is supplied with an empty battery pack suitable for 9 pcs mignon-size batteries. A new stabilizing circuit in the AE 144 N allows using Alkaline batteries (9 x 1,5 V = 13,5 V) as well as rechargeable batteries (9 x 1,2 V = 10,8 V). The battery pack has a combined DC-Socket (center pin = +) which works as:
a) External power Socket 9-15 Volts DC:
If connected to external power source, the circuit ensures that the internal batteries are switched off (up to 15 Volts) to prevent overcharging from a 12 Volts car battery supply.
b) Charger socket to charge internal NiCd-batteries:
Charging batteries is only possible if the supplied 230 V wall charger or a special mobile charger with DC/DC converter is used. The radio must be switched off during charging process. Charging normal 600 mA batteries with the wall charger will take approx. 14 hours. It is not possible to charge internal batteries by direct connection to the 12 V car battery supply.
с) Charging by bottom-Contacts:
The bottom-contacts of the battery pack are directly connected to the battery. A charger using these contacts must have currentlimiting circuits. (Only optional battery Packs MC-2 or MC-3). Warning!
Never attempt to charge Alkaline batteries with any type of charger! These batteries cannot be charged at all and may explode if you try to charge them! Be sure never to exeed 15 Volts if external power supply is used to operate the radio.
1. Connect the antenna and keep it in a vertical position.
2. Turn on the power switch.
3. Check the battery condition.
4. Set the squelch control to the extreme counter-clockwise position.
5. Set the channel selector to the desired channel.
6. Adjust SQUELCH to cut out annoying background noise.
Do not set the SQUELCH too high, or weak signals will not be able to open the squelch circuit.
To receive weak signals, it is best to leave SQUELCH set at the counter-clockwise position.
7. Adjust VOLUME control for a suitable listening level.
1. After receive operation, to transmit, press PUSH TO TALK SWITCH and talk into the mircophone with normal voice.
2. Release the PUSH TO TALK SWITCH to receive.
3. HIGH/LOW RF POWER SWITCH can be used to prolong the battery life. In the DUPLEX mode, selects the transmitting frequency, 600 KHz above or below the receiving frequency according to the desired repeater input frequency. To access the repeater depressing the VOLUME CONTROL KNOB (TONE CALL SWITCH) for the required period. Then the set change to transmit modee and tone call signal access the repeater.