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