HAFLER DH200 DH220 DH225 TO-264 16 AMP LATERAL MOSFET UPGRADE KIT AS REQUESTED! END OF AN ERA DUE TO THE DISCONTINUATION OF NOW ALL COMPLEMENTARY TO-3 LATERAL MOSFETS FOR AUDIO USE, I FOUND IT IMPERATIVE TO FIND A SOLUTION TO KEEP THESE CLASSIC AMPS MAKING MUSIC FOR ANOTHER GENERATION. AFTER MUCH RESEARCH AND TESTING, THE NEW EXICON TO-264 COMPLEMENTARY OUTPUT MOSFET UPGRADE KIT IS HERE. I WAS ALWAYS FOND OF THE ORIGINAL HITACHI MOSFETS FOR THEIR STABILITY AND SOUND BUT WAS IN FOR QUITE A SURPRISE WHEN I INSTALLED THESE NEW 16 AMP 200 VOLT 250 WATT DOUBLE DIE EXICON LATERAL MOSFETS IN A HAFLER DH-200. WOW IS ALL I CAN SAY. USE TO-3 EXICON MOSFETS FOR YEARS AFTER THE HITACHI MOSFETS WERE DISCONTINUED. I FOUND THEM TO BE SLIGHTLY BETTER SONICALLY OVER THE HITACHI BUT STABILITY VARIED FROM BATCH TO BATCH. EXICON FINALLY GOT IT RIGHT. I NEVER THOUGHT THERE WOULD BE A MORE STABLE ENHANCEMENT MODE. MOSFET THEN THE HITACHI(AND I TRIED THEM ALL) BUT CAN NOW SAY THAT THERE IS A NEW KING ON THE BLOCK. THIS COMPLEMENTARY OUTPUT SET IS DESIGNED SPECIFICALLY FOR LINEAR AUDIO APPLICATIONS WITH ENHANCED OSCILLATION SUPPRESSION. NO LOADING CAP NEEDED. NO MATCHING NECESSARY WITH TWO DIES IN SAME PACKAGE. IF YOU NEED TO REPAIR YOUR HAFLER BECAUSE OF DEFECTIVE MOSFETS, OR JUST WANT TO RE-NEW OR UPGRADE YOUR 40 YEAR OLD MOSFETS, THE MUCH NEEDED MOSFET CONVERSION KIT IS HERE! NOTE: INSTRUCTIONS AND PICTORIALS WILL BE DELIVERED VIA A USB FLASH DRIVE. THIS FORMAT INCLUDES 43 COLOR PICTURES SHOWING STEP BY STEP INSTRUCTIONS AND THE ABILITY TO ZOOM AND PRINT. THIS PACKAGE IS DESIGNED FOR INTERMEDIATE TO EXPERIENCED KIT BUILDERS. YOU MUST HAVE GOOD SOLDERING PRACTICE SKILLS AND BE ABLE TO FOLLOW INSTRUCTIONS. YOU MUST BE ABLE TO READ COLOR BANDS ON 1% AND 5% RESISTORS. YOUR TOOLS SHOULD INCLUDE THE FOLLOWING. A 40 TO 60 WATT SOLDERING IRON WITH 3/16 OR 1/4 TIP WHICH CAN REACH 600 DEGREES F. ROSIN CORE SOLDER (SUPPLIED). A DAMP SPONGE OR CLOTH TO WIPE THE TIP OF THE IRON. A WIRE STRIPPING TOOL FOR REMOVING INSULATION FROM 16GA TO 24GA WIRE. SMALL DIAGONAL OR SIDE CUTTING PLIERS. A 1/4 SPIN-TITE NUT DRIVER. YOU WILL ALSO NEED BOTH AN AMMETER CAPABLE OF RESOLVING 250MA DC ON THE 10 OR 20AMP SCALE AND A DC VOLTMETER CAPABLE OF RESOLVING 10MV DC. A VARIAC WOULD ALSO BE A PLUS BUT NOT REQUIRED. OTHER PARTS INCLUDING INRUSH LIMITERS, 35 AMP DIODE BLOCKS, POWER SWITCHES, GOLD INPUT AND OUTPUT CONNECTORS, AND FUSE HOLDERS ARE ALSO AVAILABLE IN STORE. POWER OUTPUT, DISTORTION, AND NOISE SPECIFICATIONS OF ORIGINAL DESIGN GUARANTEED TO BE MET AND PROBABLY EXCEEDED. LAST PICTURE SHOWING 20KHZ DISTORTION AT FULL POWER ONE CHANNEL DRIVEN WITH KIT INSTALLED IN A DH-200. AS WITH ANY HIGH POWER APPLICATIONS, QUA-CO LLC ASSUMES NO RESPONSIBILITY FOR IMPROPER ASSEMBLEY, FUSING OR INSTALLATION CAUSING AMP OR SPEAKER FAILURE.