Check the listing for details. DIY AM/LONGWAVE/SHORTWAVE REGENERATIVE RECEIVER (100 KHZ TO 17.35 MHZ). Condition: New. Listed at 138.00 USD. THIS IS A DIY REGENERATIVE RECEIVER, WITH A SCHEMATIC DIAGRAM AND ALL PARTS. YOU MUST MOUNT ALL PARTS AND HARDWARE, THEN HAND WIRE THE RADIO. HOWEVER, THERE'S NO STEP BY STEP CONSTRUCTION/ASSEMBLY MANUAL, SO YOU SHOULD BE EXPERIENCED IN CONSTRUCTION SIMILAR CIRCUITS BEFORE PURCHASING THIS ITEM. THIS IS THE OLD TRADITIONAL 6SK7 REGENERATIVE RECEIVER, SIMILAR TO THE CIRCUITS OF THE CANTEEN AND PARASET WWII RADIOS. THE 6SK7 TUBE CIRCUITS ARE WELL ESTABLISHED, GOOD PERFORMERS FOR REGENERATIVE RECEIVERS, IN USE SINCE THE EARLY 1940'S. THE CHASSIS IS A STURDY, 3D PRINTED, ANTIQUE BRASS COLOR, SIMILAR TO A PLASTIC MATERIAL. OTHER COLOR OPTIONS ARE AVAILABLE, PLEASE INQUIRE. THE SPECTRUM COVERAGE IS CONTINUOUS FROM ABOUT 100 KHZ LONG WAVE UP TO APPROXIMATELY 17.35 MHZ, USING MICRO INDUCTORS. AS A BONUS, THIS CIRCUIT HAS A ONE STAGE TRANSISTOR HEADPHONE AMPLIFIER, WHICH INCREASES THE VOLUME CONSIDERABLY. THE TRANSISTOR AMP IS PART OF THE CIRCUITRY, AND RUNS OFF THE COMMON DC B+ LINE OF THREE 9 VOLT BATTERIES CONNECTED IN SERIES. HIGH IMPEDANCE HEADPHONES ARE REQUIRED FOR THIS RADIO, 2 TO 4K OHMS. HEADSETS USING PIEZO ELEMENTS WILL ALSO WORK. NO HEADPHONES ARE INCLUDED IN THIS LISTING. NO EXTERNAL POWER SUPPLY SOURCE IS NEEDED. EVERYTHING IS SELF-CONTAINED ON THE CHASSIS. YOU'LL NEED TWO OF THE 3.7 VOLT CR123A RECHARGEABLE BATTERIES, PLUS 3 OF THE 9 VOLT BATTERIES, AS SHOWN IN THE PHOTOS. BATTERIES ARE NOT INCLUDED IN THIS PURCHASE. THIS RADIO HAS MAIN AND FINE TUNING, REGEN AND ANTENNA COUPLING CONTROLS ON THE FRONT PANEL. A WIRE ANTENNA OF AT LEAST 25 TO 50FT IN LENGTH, ALONG WITH A GOOD EARTH GROUND IS REQUIRED FOR BEST PERFORMANCE. A 75 TO 100 FT. LENGTH ANTENNA WILL PERFORM BEST ON THE LOWER FREQUENCIES. BEST PERFORMANCE ON THE LOWER AM AND LONG WAVE FREQUENCIES IS OBTAINED WITH A VERTICAL ANTENNA. AS STATED, AN ANTENNA COUPLING CONTROL IS PROVIDED FOR ADJUSTING TO DIFFERENT ANTENNA LENGTHS. I GUARANTEE THIS RADIO WILL WORK IF PROPERLY CONSTRUCTED AND HOOKED UP A GOOD ANTENNA. SHIPPING TO THE US AND ALSO INTERNATIONALLY VIA THE eBAY GLOBAL SHIPPING OPTION......KW7T