THIS PALOMAR 400 HF LINEARAMPLIFIER WORKS GOOD ON TX AND RX. THE PREAMP WORKS GOOD. POWER OUT IS ABOUT 400 WATTS. USESFOUR 1446 TRANSISTORS. NO BURNS OR HOT SPOTS, SEE PICTURES. SELLING AS IS- WORKING, BUT CAN\'T WARRANTY TRANSISTORS, EVEN FACTORY DOESN\'T WARRANTY TRANSISTORS BECAUSE ONE BAD ANTENNA WILL KILL THEM. BUT UNIT IS TESTED AND WILL BE AS DESCRIBED, GOOD WORKING CONDITION.