For ZENITH PHONOGRAPHS WITH COBRA ARMS…. TESTED & FOUND TO BE WORKING WELL… SPECIAL COBRA TONE ARM PRE-AMP. THANKS TO THE ENGINEERS AT ZENITH, YOU CANNOT USE A REGULAR PRE-AMP ON YOUR COBRA TONE ARM. YOU NEED THIS ONE. CONDITION: TESTED AND WORKING WELL. STRONG TUBE IN THE UNIT. WE HAVE MORE THAN ONE OF […]