Am Bcdst/shortwave Regen Radio + 80/40m Qrp Transmitter

  
I'M CONTINUING TO THIN OUT THE HERD. HERE'S ANOTHER ONE OF MY HOMEBREW RADIO PROJECTS. THIS ONE IS A BREAD LOAF REGEN RADIO WITH THE ADDED BONUS OF A QRP HAM RADIO TRANSMITTER, WHICH IS CAPABLE OF ABOUT 1.8 WATTS OUTPUT ON 80 METERS, AND AROUND 1.75 WATTS ON 40. WITH MY ANTENNA I CAN GET IT TO LOAD UP ON THE 160M BAND, AT THE EXTREME EDGE OF THE L/C CIRCUIT TUNING RANGE.

YOU MIGHT BE ABLE TO DO THE SAME ON 30M WITH THE 40M COIL PLUGGED IN. OR TO OPERATE 30M CW IT IS NOT THAT DIFFICULT TO SIMPLY WIND ANOTHER COIL (#22 ENAMELED MAGNET WIRE). 2 QRP CRYSTALS (1 EACH, 80 & 40M CW) AND 3 PLUG-IN COILS ARE PROVIDED IN THIS LISTING.

THE SINGLE TUBE CW TRANSMITTER USES A 6P1P (AKA 6V6, 6AQ5). IT RUNS AT ABOUT 3.5 WATTS DC INPUT. THE REGEN RECEIVER EMPLOYS A 6BL8 (AKA 6U8A/6KD8/6EA8, ETC).

THE PENTODE SECTION FUNCTIONS AS THE DETECTOR, FOLLOWED BY A TRIODE AUDIO AMP. WHILE THIS IS A LOW POWER RIG, THE INTERNAL VOLTAGES ARE STILL QUITE LETHAL. THIS IS SOMETHING FOR THOSE WHO ARE FAMILIAR WITH WORKING AROUND EXPOSED HIGH VOLTAGE.

THAT BEING SAID, NOTHING POTENTIALLY HAZARDOUS ON THE EXTERIOR OF THE CHASSIS, OTHER THAN THE METAL HOUSING OF THE TRANSFORMER, WHICH GETS FAIRLY WARM TO THE TOUCH. THIS IS NORMAL FOR MOST ANY TRANSFORMER. THE FREQUENCY COVERAGE OF THE RECEIVER IS FROM ABOUT 530 KHZ TO 12.6 MHZ, MADE POSSIBLE WITH THE 3 PLUG-IN COILS PROVIDED. I'VE MADE COMPARISONS WITH MIRCO INDUCTORS AND COILS SEVERAL TIMES IN DIFFERENT RADIOS AND REALLY CAN'T TELL THE DIFFERENCE IN PERFORMANCE, ONE VS THE OTHER.

SO YOU WILL HEAR A SLIGHT HUM IN THE BACKGROUND, BUT NOT ENOUGH TO BE AN ISSUE. WITH A LITTLE PRACTICE CW SIGNALS ARE FAIRLY EASY TO CLARIFY. SSB COPY IS A LITTLE MORE DIFFICULT, BUT DOABLE ONCE YOU BECOME FAMILIAR WITH THE CONTROLS. AS WITH MOST RADIOS OF THIS TYPE, IF YOU ADVANCE THE REGEN CONTROL TOO FAR YOU ARE LIKELY TO GET BLASTED WITH A LOUD SQUEAL.

THIS IS NORMAL AND WITH A LITTLE USE YOU'LL KNOW WHERE TO SET THE CONTROL IN ORDER TO AVOID THE SQUEAL SURPRISE! A SIMPLE TOGGLE SWITCH ON THE FRONT PANEL IS USED FOR THE SEND/RECEIVE FUNCTION. ANTENNA FEED, ALONG WITH HEADSET AND KEY JACKS ARE LOCATED ON THE REAR OF THE CHASSIS.

HIGH IMPEDANCE HEADPHONES ARE REQUIRED FOR THIS RADIO. EITHER AN OLD MAGNETIC INDUCTIVE TYPE OR A HI-Z PIEZO HEADSET...... YOU WILL NEED ONLY ONE ANTENNA AND A GOOD GROUND CONNECTION FOR THIS RADIO. IT HAS THE SEPARATE PARALLEL/SERIES TUNING CIRCUIT FOR MATCHING TO THE ANTENNA, VERY SIMILAR TO THAT WHICH WAS USED FOR THE OLD PARASET SPY RADIO OF THE 1940'S.

A GOOD SWR MATCH IS ALWAYS BEST, BUT THIS TRANSMITTER IS CAPABLE OF LOADING INTO A WIDE RANGE OF RANDOM WIRE LENGTHS, FOR 80 AND 40M OPERATION. THE RECEIVER HAS MAIN TUNING, FINE TUNING, REGEN AND ANTENNA COUPLING CONTROLS. I WILL INCLUDE A ROUGH HAND SKETCHED DRAWING OF THE CIRCUIT, AS WELL AS A BLOCK DIAGRAM SHOWING THE DIFFERENT CONTROL FUNCTIONS. The item "AM BCDST/SHORTWAVE REGEN RADIO + 80/40M QRP TRANSMITTER" is in sale since Wednesday, September 2, 2020. This item is in the category "Consumer Electronics\Radio Communication\Ham, Amateur Radio\Ham Radio Receivers".

The seller is "dwight8941" and is located in Grand Junction, Colorado. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, Sweden, South Korea, Indonesia, Taiwan, South africa, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Antigua and barbuda, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Saint lucia, Montserrat, Turks and caicos islands, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Pakistan, Paraguay, Reunion, Uruguay, Russian federation.

• Features: Analog
• Brand: Unbranded