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One Tube Superhet
Back in the late 60's, I built a one tube superhet from a magazine called
Elementary Electronics. I still have that radio but not the magazine. Can anyone tell me what month and year had that project? The circuit uses a 6M11 compactron and a 1N34 detector. Doug |
Doug,
This is not the circuit you are thinking of but the Fremodyne is a one tube superhet. One triode of a 12AT7 is the local oscillator, the other is a converter/super-regenerative detector at the I.F. frequency. Several radio manufacturers produced them as low cost fm receivers in the late 1940's. ray "Dougwix" wrote in message ... Back in the late 60's, I built a one tube superhet from a magazine called Elementary Electronics. I still have that radio but not the magazine. Can anyone tell me what month and year had that project? The circuit uses a 6M11 compactron and a 1N34 detector. Doug |
Doug,
This is not the circuit you are thinking of but the Fremodyne is a one tube superhet. One triode of a 12AT7 is the local oscillator, the other is a converter/super-regenerative detector at the I.F. frequency. Several radio manufacturers produced them as low cost fm receivers in the late 1940's. ray "Dougwix" wrote in message ... Back in the late 60's, I built a one tube superhet from a magazine called Elementary Electronics. I still have that radio but not the magazine. Can anyone tell me what month and year had that project? The circuit uses a 6M11 compactron and a 1N34 detector. Doug |
Back in the late 60's, I built a one tube superhet from a magazine called
Elementary Electronics. I still have that radio but not the magazine. Can anyone tell me what month and year had that project? The circuit uses a 6M11 compactron and a 1N34 detector. I've not seen that magazine nor that particular circuit, but I do have a photocopy of "Project E10" (apparently from a set of projects?) with the title "One-Compactron Receiver - All Bands" and a footnote "Reprinted by permission of Popular Electronics magazine", but with NO citation. FWIW, the particular compactron this article uses is a 6AF11, but it appears to be a one-stage regenerative receiver followed by two stages of audio. For such a small circuit, it shouldn't be too difficult to regenerate the schematic; I did it once for an All-American Five. --Myron. -- Five boxes preserve our freedoms: soap, ballot, witness, jury, and cartridge PhD EE (retired). "Barbershop" tenor. CDL(PTXS). W0PBV. (785) 539-4448 NRA Life Member and Certified Instructor (Home Firearm Safety, Rifle, Pistol) |
Back in the late 60's, I built a one tube superhet from a magazine called
Elementary Electronics. I still have that radio but not the magazine. Can anyone tell me what month and year had that project? The circuit uses a 6M11 compactron and a 1N34 detector. I've not seen that magazine nor that particular circuit, but I do have a photocopy of "Project E10" (apparently from a set of projects?) with the title "One-Compactron Receiver - All Bands" and a footnote "Reprinted by permission of Popular Electronics magazine", but with NO citation. FWIW, the particular compactron this article uses is a 6AF11, but it appears to be a one-stage regenerative receiver followed by two stages of audio. For such a small circuit, it shouldn't be too difficult to regenerate the schematic; I did it once for an All-American Five. --Myron. -- Five boxes preserve our freedoms: soap, ballot, witness, jury, and cartridge PhD EE (retired). "Barbershop" tenor. CDL(PTXS). W0PBV. (785) 539-4448 NRA Life Member and Certified Instructor (Home Firearm Safety, Rifle, Pistol) |
Dougwix wrote in message ... Back in the late 60's, I built a one tube superhet from a magazine called Elementary Electronics. I still have that radio but not the magazine. Can anyone tell me what month and year had that project? The circuit uses a 6M11 compactron and a 1N34 detector. Doug WA2ISE has a site that describes interesting mods to "All-American 5" AM radios, and the following URL discusses a 3 Compactron set. By changing the rectifier and detector to solid state devices, and either sacrificing IF gain and/or speaker output, it might be possible to squeeze all that into two triodes and a pentode, which is what's in a 6M11. It's not exactly what you're looking for, but it may give you or somebody else some clever ideas: http://pw2.netcom.com/~wa2ise/radios/compaa3.html W0PBV wrote elsewhere in this thread of a "Project E10, One-Compactron Receiver - All Bands" article in "Popular Electronics" magazine. This may be the article to which he refers: http://www.jvgavila.com/compac.htm |
Dougwix wrote in message ... Back in the late 60's, I built a one tube superhet from a magazine called Elementary Electronics. I still have that radio but not the magazine. Can anyone tell me what month and year had that project? The circuit uses a 6M11 compactron and a 1N34 detector. Doug WA2ISE has a site that describes interesting mods to "All-American 5" AM radios, and the following URL discusses a 3 Compactron set. By changing the rectifier and detector to solid state devices, and either sacrificing IF gain and/or speaker output, it might be possible to squeeze all that into two triodes and a pentode, which is what's in a 6M11. It's not exactly what you're looking for, but it may give you or somebody else some clever ideas: http://pw2.netcom.com/~wa2ise/radios/compaa3.html W0PBV wrote elsewhere in this thread of a "Project E10, One-Compactron Receiver - All Bands" article in "Popular Electronics" magazine. This may be the article to which he refers: http://www.jvgavila.com/compac.htm |
"mcalhoun" wrote in message ... Back in the late 60's, I built a one tube superhet from a magazine called Elementary Electronics. I still have that radio but not the magazine. Can anyone tell me what month and year had that project? The circuit uses a 6M11 compactron and a 1N34 detector. I've not seen that magazine nor that particular circuit, but I do have a photocopy of "Project E10" (apparently from a set of projects?) with the title "One-Compactron Receiver - All Bands" and a footnote "Reprinted by permission of Popular Electronics magazine", but with NO citation. FWIW, the particular compactron this article uses is a 6AF11, but it appears to be a one-stage regenerative receiver followed by two stages of audio. For such a small circuit, it shouldn't be too difficult to regenerate the schematic; I did it once for an All-American Five. --Myron. Hi Myron, I built the 6AF11 regen- it is a very nice little receiver. My version can be seen at: http://parelectronics.com/pics/regen2.jpg Dale W4OP |
"mcalhoun" wrote in message ... Back in the late 60's, I built a one tube superhet from a magazine called Elementary Electronics. I still have that radio but not the magazine. Can anyone tell me what month and year had that project? The circuit uses a 6M11 compactron and a 1N34 detector. I've not seen that magazine nor that particular circuit, but I do have a photocopy of "Project E10" (apparently from a set of projects?) with the title "One-Compactron Receiver - All Bands" and a footnote "Reprinted by permission of Popular Electronics magazine", but with NO citation. FWIW, the particular compactron this article uses is a 6AF11, but it appears to be a one-stage regenerative receiver followed by two stages of audio. For such a small circuit, it shouldn't be too difficult to regenerate the schematic; I did it once for an All-American Five. --Myron. Hi Myron, I built the 6AF11 regen- it is a very nice little receiver. My version can be seen at: http://parelectronics.com/pics/regen2.jpg Dale W4OP |
Wow, nice
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