To simplify construction a low-cost PC board is available from FAR circuits. Hi this is Dave Schmarder.
One Tube 1d8 Sw Radio Schematic Sw Radio Radio Electronics Projects Diy
Monday September 28 2009 41111 PM.
1 TUBE REGEN RADIO. Refer to the schematic in Figure 1. I have a few questions to ask about components. I am new to regens but have made lots of crystal radios.
The triode section is used in an Armstrong regenerative detector and the pentode section is used as an audio amplifier. One Tube Regenerative Radio. Power for this receiver is 15 V DC for the filaments and 45V DC for the plate current.
Most one tube regen radios have the 45 volts B going through the headset. Plug-in coils using DIN speaker plugs. So far I have been running it on a 15 volt D cell.
The radio can also drive a small speaker. Also an audio amplifier can be connected without altering the circuit. Built a work of art.
I was able to get about 01ppm stability from wwv and from local radio stations. This radio kit will cover the AM radio band along with the SW radio band. I dont have any local flamethrowers only a 400 watt BIC down the road about 10 miles.
When I find a 2 volt lead acid cell I will use that. Although I much prefer tubes this one should satisfy those who may want to build and use a more up-to-date. A D cell and five 9V transistor batteries wired in series will work to power this radio.
The radio is a regenerative receiver using a combination triode-pentode tube which is like having two tubes in one so I guess this is actually a two tube radio. One Tube Regenerative Radio. There are connections for short and long antennas.
Requires two T-1T4_DF91 tubes not included. I just got a regen built with the help of a young guy who was visiting area relatives. A 2000 ohm headset or an audio amplifier is required.
Its been many years since Tandy corporation has put out th one tube radio kit. The antenna is a 100 spool of hookup wire running up to the attic. Contact is made to the tube prongs by means of 4 ordinary wire paper clips bent so that.
L1 and C1 tune the input signal from the whip antenna. Borden Armstrong 1 tube regen radio Post by KR1S Mon Feb 10 2014 1012 pm One thing I noticed though was that regeneration occurred quite freely at the top end of the band but tapered off towards the bottom with 612 ABC having virtually no regen at all - cant explain that. This page is here to show all the vacuum tube radios that I have built in the 21st century.
Armstrong single tube regenerative AM broadcast band receiver. Daves Homemade Tube Radios. Circuit Description Take a look at the schematic in Figure 1.
But with the miracle of digital cameras and the internet you get to see what Ive been. So to say the least my knowledge is limited. 15 V for A battery and 225 for B battery.
The internet is amazing. Here are some pics of my completed regen radio. Regenerative radios work very well for me.
The front panel is a piece of 45 x 55 printed circuit board. I built lots of stuff with tubes in the old pre-internet days but those are long gone and no pictures exist. Headphone jacks antenna ground and battery connections are all are in the back.
There are other annoyances such as the whistles and no real accurate frequency readout such as what I have with my 1 Tube Superheterodyne Radio. The 30 tube requires 2 volts to operate the filament. The Analog Dial featuring MRL 1 tube regen receiver the Lafayette KT-135 Westinghouse Little Jewel Motorola 53R and other radio projects.
When this poor mans frequency standard looses lock the speaker squeals out a warning. Another way to light the tube is to use two D. This radio uses a single type 30 tube.
Borden Armstrong 1 tube regen radio. It is surprisingly immune to hand capacitance while tuning it. The regenerative detector and a low level audio amplifier.
1 Tube regen. The long connection puts a 250pf capacitor in series with the antenna wire. By SWsenior Wed Jan 08 2014 231 pm.
The tube socket consists of 4 holes halfway through the base as indicated Fig. I really like the shape of those old tubes. By SkyKing Thu Jan 02 2014 308 am.
Schematic for the retro regen radio. 3 An FET version of the 1-V-1 Regenerative Receiver designed and built by CF. 1 You can house the receiver in a readily available RadioShack plastic project box.
Rockey and shown as one among many in the Lindsay Publishing Co. The voltages required were different although. 2B the 2 rear ones filament being slightly larger than the others 18- and 116-in.
The regen still makes a great contest radio. The tube circuit consists of two sections. An LM386 IC power amplifier serves this purpose making the overall design a hybrid mix of vacuum tube and semiconductor technology.
There are no problems with stray capacitance in the headset cord to throw you off while tuning a weak station. Book Secrets of Homebuilt Regenerative Receivers available from Lindsay for 995. Wed May 08 2013 244 am.
Home brew one tube ecc86 12V battery powered regenerative short wave radio. Saturday January 22 2011 103623 PM. This is a Modern Radio Labs 1 tube regen radio purchased as a kit from Elmer Osterhoudt in 1985.
Karen from the UK.
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