Programmable ScrewDriver Antenna Controller
Programmable Screw Driver Antenna Controller
MFJ-1924 - Programmable Screwdriver Antenna Controller. Tuning your mobile screwdriver antenna couldn?t be easier or more reliable! The MFJ-1924 lets you save 10 of your favourite screwdriver antenna positions in memory -- that's more than enough for all HF bands.
Then, with a push of a button, you can quickly return to any saved position.Up/Down buttons let you manually move the antenna to any desired position. A 4-digit turns counter gives you precise antenna position -- you can see it's super bright LEDs even in direct sunlight! Returning to a position from memory is extremely accurate for three reasons.
The antenna always moves to its desired position from the bottom, ensuring that the motor is always loaded the same -- moving the antenna up is harder than moving it down. It's harder to walk up a hill than down a hill.
MFJ's exclusive AutoParkTM feature automatically bottoms your antenna for parking in your garage and resets and calibrates your counter each time to eliminate antenna slippage and turns count errors.
The momentum of the moving antenna causes it to overshoot its stop point. MFJ's exclusive Dead-OnSTOPTM feature automatically reverses the motor briefly just before it stops to eliminate overshoot and come to a precise stop.MFJ's exclusive StallProtectorTM feature prevents your expensive motor from burning out. Automatically detects motor stall and completely shuts off power to the motor. Motor current can be monitored on the LEDs to look for signs of trouble and to determine stall current. If you wire the motor backwards, you can reverse its direction from the MFJ-1924 front panel so the UP button is always up and the DOWN button is always down. Compatible with single and dual magnetic turns sensors. Requires 12 VDC. 31/2Wx31/4Hx11/4D inches. Power, motor control and sensor lines included for connection to your screwdriver antenna.