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MFJ-432 Voice Memory Keyer
MFJ-432 Voice Memory Keyer
Introduction
The MFJ-432 Voice Memory Keyer will take you to new dimensions in the Contest
world. Do poor band conditions leave you hoarse and frustrated? Not any more! By
storing your own natural voice in the MFJ-432 Voice Memory Keyer, you can repeat the
same message as many times as necessary. You can now operate most of a contest by just
pressing a few buttons and still have your own voice when you're finished.
The MFJ-432 Voice Memory Keyer is capable of storing as many as four natural
sounding messages in a total of 20 seconds. It will also repeat stored messages
continuously. A built in speaker allows you to monitor your stored messages. Internal
jumpers let you customize your it to own rig. Contests have never been easier!
Connections
Power
A 12 Vdc 300 milliamp power supply should be used with the MFJ-432. The power jack
accepts a 2.1mm coaxial plug with the center conductor positive. An optional dc supply,
the MFJ-1312B, is available from MFJ. Connect your MFJ-1312B or compatible dc
supply (coaxial line with shield ground) into the power jack on the MFJ-432.
Radio and Microphone Connections
This unit supports Icom, Kenwood, or Yaesu radios with 8 pin microphone connectors.
Internal jumpers are used to set the unit for each make of radio. The MFJ-432 is set for
Kenwood at the factory. Jumpers can be changed to the appropriate settings for Icom or
Yaesu radios. The unit should simply be open and the jumpers adjusted to the Y settings
for Yaesu or the I settings for Icom. The jumpers should be changed on both HD1 and J4.
Output Level
The audio output level to your radio may be adjusted using the trimpot labeled OUTPUT
LEVEL CONTROL. The control is accesible through a hole in the back panel. A small
slotted screwdriver can be used to adjust the trimpot.
Audio In and Audio Out
The AUDIO IN and AUDIO OUT jacks accept standard mono or stereo 3.5 mm
miniature jacks. The AUDIO OUT jack is driven differentially across the tip and the
shield of the jack. The AUDIO IN jack is used to record audio from your radio or other
external source. The AUDIO IN jack should have the audio on the tip and ground on the
shield of the connector.
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Table of Contents
Related Manuals for MFJ MFJ-432
Summary of Contents for MFJ MFJ-432
- Page 1 This unit supports Icom, Kenwood, or Yaesu radios with 8 pin microphone connectors. Internal jumpers are used to set the unit for each make of radio. The MFJ-432 is set for Kenwood at the factory. Jumpers can be changed to the appropriate settings for Icom or Yaesu radios.
- Page 2 MFJ-432 Voice Memory Keyer Accessory Port Beside the audio in jack is a connector for a IDC plug. Each message line plus 5 volts out is available on this port. This plug can be used to implement a remote or other accessory circuits.
- Page 3 Press and lock the REPEAT MSG 1 button to repeat message 1. The MFJ-432 will play message 1 once and then start transmitting it over the air until the REPEAT MSG 1 button is released to the "out" position. To change the delay time, a trimpot, labeled REPEAT DELAY, is accessible through a hole in the back panel.
- Page 4 MFJ-432 Voice Memory Keyer Message Memories The message space is a continuous block of audio memory. This large block is divided into 4 message memories. Memory 1 starts at 0 seconds. Memory 2 starts at 8 seconds. Memory 3 starts at 12 seconds. Memory 4 starts at 16 seconds. Each section of memory can only contain 1 messages' audio.
- Page 5 If the manual does not reference your problem or your problem is not solved by reading the manual, you may call MFJ Technical Service at 601-323-0549 or the MFJ Factory at 601-323-5869. You will be best helped if you have your unit, manual and all information on your station handy so you can answer any questions the technicians may ask.
- Page 6 MFJ-432 Voice Memory Keyer Schematic...
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