MFJ-434B contest voice keyer
Contest voice keyer with 5 messages (75 s total), EEPROM, 8-pin round or modular microphone
The MFJ-434B is a voice keyer that calls CQ, sends your callsign and handles contest exchanges with your own voice. It records and plays back 5 messages totalling 75 seconds.
Product description
The EEPROM memory keeps the messages without a backup battery. Messages can be repeated continuously with a delay from 3 to 500 seconds; they are stopped with the Stop button, the microphone PTT, VOX or an external command.
A receive input lets you record and replay on-air signals. It has jacks for remote or computer control (CT, NA, TR and other programs), a built-in monitor speaker and a 3.5 mm headphone/speaker output.
It is transparent to the microphone. Audio lines are RF-filtered and an isolation transformer eliminates ground-loop hum. Internal jumpers configure it for Kenwood, Icom, Yaesu, Alinco or Radio Shack.
Key features
75 seconds in total.
No backup battery.
Compatible with contest loggers.
Specifications
| Messages | 5, total 75 s |
| Memory | EEPROM |
| Repeat | Adjustable delay 3–500 s |
| Microphone | 8-pin round or modular |
| Audio output | Internal speaker, 3.5 mm jack |
| Power supply | 9 V battery or 9–15 V DC (optional MFJ-1312D supply) |
| Dimensions | approx. 16.5 × 6.4 × 16.5 cm (6½ × 2½ × 6½") |
HamRadioShop | Station accessories
