Page 17 of MFJ 2006 Catalog by MFJ Enterprises, Inc.

MFJ RF Sense T/R Switch Automatic T/R Switch senses transmitted RF and switches your antenna from receive to transmit using a relay. Shorts your receiver antenna input to ground to protect your receiver. Provides an auxiliary contact closure to ground during receive (opened in transmit) for an On-Air sign or other use. Instead of using RF sense to switch the antenna, a control line input lets your key/keyer or PTT line switch the antenna. Adjustable time delay circuit gives you delayed switching. All modes. 200 Watts SSB PEP. Measures 4Wx2 5/8Hx1 1/2D inches. 12 VDC or 110 VAC with MFJ-1312D, $14.95. MFJ . . . The World Leader in Ham Radio Accessories 17 Safeguard your expensive equipment from static electricity and lightning induced surges on 50 Ohm coaxial line. MFJs Guardian Angel TM Lightning Surge Protectors has an Ultra-fast gas discharge tube that safely shunts up to 5000 amps of peak impulse current harmlessly to an independent ground. SWR less than 1.1:1. Less than 0.1 dB loss. Use up to 1000 MHz. MFJ-270 handles 400 W PEP. MFJ-272 handles 1.5 kW PEP. MFJ-270 and MFJ-272 do not protect against a direct lightning hit. MFJ-270, $29.95. SO-239 to SO-239. MFJ-270MF, $34.95. SO-239 to PL-259. MFJ-270N, $34.95. Low-loss N-connectors. MFJ-97, $9.95. Replacement gas discharge tube for MFJ-270. MFJ-272, $39.95. SO-239- SO-239. MFJ-272N, $44.95. N Connectors. MFJ-272MF, $44.95. SO-239 to PL-259. MFJ-97H, $19.95. Replacement Gas Discharge tube for MFJ-272. Safeguard expensive gear from static electricity and lightning surges MFJ Lightning Surge Protectors handle 400 Watts PEP or 1500 Watts PEP MFJ-272 $39 95 Ship Code A 400Watts! MFJ-272MF pictured. 1.5kWatts MFJ-270 $29 95 Ship Code A MFJ-1708 $69 95 Ship Code A Rig/Antenna RF Safety Switch MFJ- 1703 keeps your expensive transceivers safe from transmitting into nothing! No more burning up your radio because you forgot to change your antenna switch! 1.8 to 30 MHz. Your transceiver is always hooked up to one of two antennas! Connect two rigs and two antennas and switch to different combinations. 300 watts PEP SSB, 150 watts CW. Handy mounting tabs. All metal, switches 50-75 Ohm unbalanced lines. MFJ-1703 $19 95 Ship Code A BiasTee DC Power Injector Send up to 1 Amp DC /50 Volts DC through coax cable to power equipment (automatic antenna tuner, remote antenna switch, relay box) without running separate cable. Requires one MFJ-4116 on each end of coax to inject DC power and to retrieve DC power. 1-60 MHz. SO-239 connectors. 2 3/4Wx2 1/2Hx1 1/4D inches. MFJ-4116P, $47.95, pair of MFJ-4116. MFJ-4117, $29.95. Like MFJ-4116, but with switch to turn remote equipment on/off. MFJ-4116 $24 95 Ship Code A MFJ lets you use the popular Yaesu ATAS series screwdriver antenna with Icom, Kenwood, Alinco radios, others. MFJ-1925 I2 plugs directly into the Icom IC-706. Up/Down switch puts the Icom 706 in low power and tunes antenna. Simple to install. No modification to radio/antenna needed. SO-239 connectors. Order MFJ-1925 I2 for Icom 706. Order MFJ-1925 for Kenwood, Alinco and others. Use any rig with Yaesu ATAS Screwdriver Ant MFJ Programmable Screwdriver Antenna Controller 10 Memories . . . Super Accurate . . . AutoPark TM . . . StallProtector TM. . . Super bright LEDs MFJ-1925/I2 $59 95 Ship Code A Tuning your mobile screwdriver antenna couldnt be easier or more reliable! The MFJ-1924 lets you save 10 of your favorite screwdriver antenna positions in memory thats 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 its super bright LEDs even in direct sunlight! Returning to a position from memory is extremely accurate for three reasons . . . A. The antenna always moves to its desired position from the bottom, insuring that the motor is always loaded the same -moving the antenna up is harder than moving it down. Its harder to walk up a hill than down a hill. B. MFJs exclusive AutoPark TM 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. C. The momentum of the moving antenna causes it to overshoot its stop point. MFJs exclusive Dead-OnSTOP TM feature automatically reverses the motor briefly just before it stops to eliminate overshoot and come to a precise stop. MFJs exclusive StallProtector TM feature prevents your expensive motor from burning out. Automatically detects motor stall and completely shuts off power to 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. 3 1/2Wx3 1/4Hx1 1/4D inches. Power, motor control and sensor lines included for connection to your screwdriver antenna. MFJ-82, $29.95. Magnetic sensor kit for High Sierra antennas to use MFJ-1924. MFJ-83, $9.95. Magnetic sensor kit for Hi-Q Antennas to use MFJ-1924. MFJ Digital Screwdriver Controller Tells you exactly where your antenna is positioned! Re-tune exactly fast, no more guessing. Super bright .40 high-intensity 4-digit LED display and precision micro-controller gives digital count range -999 to +999. On/off/reset switch for easy calibration. 4Wx1 1/2H x2D inches. Use 13.8VDC. MFJ-82, $29.95. Magnetic sensor kit for High Sierra antennas to use MFJ-1922. MFJ-83, $9.95. Magnetic sensor kit for Hi-Q Antennas to use MFJ-1922. MFJ-1922 $79 95 Ship Code A MFJ-1924 $119 95 Ship Code A

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