‰ NOW 30 WPM ‰ TEXT IS FROM AUGUST 2012 QST PAGE 47‰ NETWORK DESKTOP AUTO TUNERS. TURNING THESE INTO REMOTE AUTO TUNERS INVOLVED MOUNTING THEM IN WEATHERPROOF BOXES AND REMOVING SOME OF THE DESKTOP FEATURES SUCH AS A/B ANTENNA SWITCHING AND MULTIPLE MEMORY BANKS. A COMPARISON OF THE MFJ994BRT AND MFJ 998RT AUTO TUNERS IS GIVEN IN TABLE 1. IN ADDITION TO THE HIGHER RF POWER RATINGS, THE MFJ 994BRT AND MFJ 998RT INCLUDE SOME INTERESTING FEATURES NOT FOUND IN OTHER REMOTE AUTO TUNERS. THE FIRST IS AN INTERNAL BIAS T FOR THOSE WHO MAY NOT HAVE DC POWER AVAILABLE AT THE ANTENNA. A BIAS T ALLOWS YOU TO INJECT DC INTO THE COAX FEED LINE SO YOU DONT HAVE TO RUN A SEPARATE POWER CABLE. AN MFJ 4117 BIAS T FOR THE STATION END OF THE FEED LINE IS INCLUDED WITH BOTH UNITS AND IT INCLUDES AN ON/OFF SWITCH FOR CONVENIENT POWER CONTROL OF THE AUTO TUNERS. THE MFJ 994BRT AND MFJ 998RT PROVIDE SO 239 CONNECTORS AND RANDOM WIRE OUTPUTS ONLY ONE AT A TIME CAN BE USED. THE SO 239 CONNECTOR HAS BEEN TESTED TO MORE THAN 2 KV TO ENSURE THERE IS NO POSSIBILITY OF ARCING UNDER HIGH SWR CONDITIONS. THESE AUTO TUNERS INCLUDE AN LC LIMIT FEATURE THAT PROVIDES UPPER LIMITS OF INDUCTANCE AND CAPACITANCE ACCORDING TO FREQUENCY ‰ END OF 30 WPM TEXT ‰ QST DE W1AW ƒ