One Tube Regenerative Receiver Project by Survivalist2008

Описание: Hi, this is John, Survivalist2008. Join me as we take a look at a project that I constructed. It's a One Tube Regenerative Radio. I'll show you how it's constructed, and conduct a demonstration of the receiver in use. Fellow YouTuber MIKROWAVE1 provided my inspiration and basic information to construct this project, so if you're interested in building this project yourself, I recommend watching his excellent videos on the receiver. See link below.

Specifics of 6BF6 Tube:
Twin Diode, Medium-MU Triode. Used as a combined detector, amplifier, and AVC tube.
Filament voltage: 6.3 volts @ 300 mA
Peak Filament to Cathode voltage: 90 volts max.

The regenerative receivers oscillate, and thus, they interfere with other receivers. The German forces in WWI and WWII took advantage of that technical fact, and sent out trucks outfitted with signal locating equipment to track down members of the Allied Underground who might be using the regen receiver.

I wound my own coils on 1-1/4" diameter bakelite coils that I found online. I experimented with wire diameters (22&26 gauge coated magnet wire) and the number of turns. Here's what mine turned out to be: AM Broadcast Coil; 84/14, 84 turns antenna coil, 14 turns tickler coil (26 gauge; 430 khz. bandwidth; 640 khz.-1070 khz.) - AM Broadcast Coil #2; 57/7 (22 gauge; 1510 khz. bandwidth; 990 khz.-2.50 mhz.) - SW Coil; 26/6 (26 gauge; apprx. 2 mhz. bandwidth; 1400 khz.-3.330 mhz.) - 80m Ham Band Coil; 8/3 (26 gauge; apprx. 5.9 mhz. bandwidth; 3.728-9.590 mhz.) Standard 5 pin tube socket used as the base. Used hot glue to secure wire when winding the coils. Gap between antenna coils and tickler coil is critical, I experimented. Also, wind both coils in same direction on coil form.
Pick four pins on the coil form, making sure the same pins are used on the base (two pins for each coil), and wire all of your coils the same way, then they are interchangeable.

I use an 80m dipole as my antenna, with a co-ax run in from a matching box outside. The shield is grounded at the match box, so that becomes the ground for the receiver. The co-ax center connector is used as a long wire. It works great.

Spend an evening doing a little reading online. Search for Crystal Radio Sets, Regenerative Circuits, One Tube Regenerative Receivers, The Evolution of Radio Technology, etc. And most important, watch the videos that MIKROWAVE1 has uploaded. He even shows you the schematic diagram, and give alot of tips on the construction of the receiver. He even has a video on a neat 40m receiver!

MIKROWAVE1 YouTube Channel:    / @mikrowave1  

MIKROWAVE1's Part 1 Video on the Regen:    • Morgan Regen Part 1  

MIKROWAVE1's Part 2 Video on the Regen (with schematic at the 3:18 mark):    • Morgan One Tube Regen Part 2  

Regenerative Circuit on Wikipedia:
https://en.wikipedia.org/wiki/Regener...

Thanks for watching!