I CONSTRUCT THESE WHEN ORDERED, SO PLEASE ALLOW APPROXIMATELY 3 WEEKS FOR SHIPMENT, ONCE PURCHASED. 

THIS IS MY VERSION OF THE 1950'S MAXWELL 1S4 REGENERATIVE RECEIVER. IN THIS CASE I'VE EMPOLYED THE 3 VOLT, 3S4 VERSION OF THIS LITTLE VACUUM TUBE. THE 1940 MINIATURE 1S4/3S4 TUBES DO A REMARKABLE JOB AS A REGENERATIVE DETECTORS. 

HIGH IMPEDANCE 2 TO 4K OHM HEADPHONES ARE REQUIRED. YOU MAY ALSO USE PIEZO TYPE HEADSETS.

HEADPHONES ARE NOT INCLUDED IN THIS LISTING.

THE SPECTRUM COVERAGE IS CONTINUOUS FROM ABOUT 540 khz AM, UP TO APPROXIMATELY 15.0 MHZ SHORTWAVE, USING PLUG-IN COILS THAT ARE INCLUDED. 

THE CHASSIS SIZE IS ABOUT 185 x 125 x 100MM'S, INCLUDING THE BATTERY HOLDERS AND BINDING POST CONNECTIONS.

WITH BATTERIES INSTALLED, NO EXTERNAL POWER SUPPLY SOURCE IS NEEDED. EVERYTHING IS SELF-CONTAINED ON THE CHASSIS. YOU'LL NEED ONE OF THE 3.7 VOLT 18650 RECHARGEABLE BATTERIES, PLUS 3 OF THE 9 VOLT BATTERIES, AS SHOWN IN THE PHOTOS. 

ALL BATTERIES PLUG INTO HOLDERS AND/OR SNAPS, AS SHOWN. BATTERIES ARE NOT INCLUDED IN THIS PURCHASE. YOU'LL NEED TO PURCHASE BATTERIES TO OPERATE THIS RADIO.   

THIS CIRCUIT HAS MAIN AND FINE TUNING, REGEN AND ANTENNA COUPLING CONTROLS ON THE FRONT PANEL. 

A WIRE ANTENNA OF AT LEAST 50 TO 100 FT. IN LENGTH, ALONG WITH A GOOD EARTH GROUND, IS REQUIRED FOR BEST PERFORMANCE. THE ANTENNA THAT I USE IS WELL OVER 100 FT. LONG. 

I GUARANTEE THIS RADIO WILL WORK IF YOU HOOK IT UP PROPERLY. YOU'LL RECEIVE A HAND SKETCHED SCHEMATIC DIAGRAM OF THE CIRCUIT, PLUS A BLOCK DIAGRAM SHOWING WHERE TO HOOK THE ANTENNA, HEADPHONES, POWER, ETC.

SHIPPING TO US ZIP CODES ONLY, WHICH CAN ALSO INCLUDE OVERSEAS PURCHASES, MADE VIA THE eBAY INTERNATIONAL SHIPPING OPTION. THE SAME APPLIES TO MOST ANY OF MY ITEMS LISTED ON eBAY.