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 Post subject: One Tube Receiver
PostPosted: May Tue 28, 2019 9:46 pm 
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Location: Scotia, NY 12302
I was going through some old magazines today and one looked familar.
Several years ago I built a one tube receiver from it just to see if
it would work, and it did. It was in Popular Science Radio and
Television Annual from 1950. I then built a one tube audio amp for it
using a 12BH7 tube from SPRAT (GQRP's publication) but I don't remember
what issue. The receiver with a 1S4 tube needs 1.5 volts for the filiment
and the amp 12 volts. Both work fine with 12 volts for the plate. Nothing
to write home about but it does receive stations and will power a speaker.
Just thought I'd post a few photos.

AL


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1S4_Rx.jpg
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amp_a.jpg
amp_a.jpg [ 419.42 KiB | Viewed 855 times ]
amp_b.jpg
amp_b.jpg [ 454.93 KiB | Viewed 855 times ]

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 Post subject: Re: One Tube Receiver
PostPosted: May Tue 28, 2019 10:48 pm 
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Nice workmanship! Back about 1957 I built a one-tube receiver, using I think it was a 1T4. It took a 22-1/2 volt battery for the plate supply. Still have it.


Attachments:
One tube radio.jpg
One tube radio.jpg [ 280.79 KiB | Viewed 838 times ]
One tube radio rear.jpg
One tube radio rear.jpg [ 247.69 KiB | Viewed 838 times ]

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 Post subject: Re: One Tube Receiver
PostPosted: May Tue 28, 2019 11:52 pm 
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Thanks fifties! And that's a nice one you've got there. Glad you still have it.
I have always enjoyed building simple projects from books and magazines.
Most of them just for fun. I still have a crystal/transistor radio I built not long
after the CK722 came out.

Al

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 Post subject: Re: One Tube Receiver
PostPosted: May Wed 29, 2019 4:10 am 
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Als_Basement wrote:
I still have a crystal/transistor radio I built not long
after the CK722 came out.

Al

I still have mine as well, with a blue CK722 (this should be scary for you, since we both seem to think alike), and a Philmore 2 Transistor radio kit.

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 Post subject: Re: One Tube Receiver
PostPosted: May Wed 29, 2019 6:14 am 
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fifties wrote:
Nice workmanship! Back about 1957 I built a one-tube receiver, using I think it was a 1T4. It took a 22-1/2 volt battery for the plate supply. Still have it.


Your radio is probably very similar to the 'Pee-Wee' radio on page 27 of the 1957 Radio-TV Experimenter:

https://www.americanradiohistory.com/Archive-Radio-TV-Experimenter/Radio-TV-Experimenter-1957-Vol-4.pdf

and, not all that far off from the Radio Shack P-Box One Tube Radio I once had. Unfortunately, I later parted that radio out, and no longer have it.

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 Post subject: Re: One Tube Receiver
PostPosted: May Wed 29, 2019 8:18 am 
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Norm_N_Tam wrote:
fifties wrote:
Nice workmanship! Back about 1957 I built a one-tube receiver, using I think it was a 1T4. It took a 22-1/2 volt battery for the plate supply. Still have it.


Your radio is probably very similar to the 'Pee-Wee' radio on page 27 of the 1957 Radio-TV Experimenter:

https://www.americanradiohistory.com/Archive-Radio-TV-Experimenter/Radio-TV-Experimenter-1957-Vol-4.pdf

and, not all that far off from the Radio Shack P-Box One Tube Radio I once had. Unfortunately, I later parted that radio out, and no longer have it.

Yup, that's the one! Nice sleuthing!

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 Post subject: Re: One Tube Receiver
PostPosted: May Wed 29, 2019 7:27 pm 
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fifties wrote:
Als_Basement wrote:
I still have a crystal/transistor radio I built not long
after the CK722 came out.

Al

I still have mine as well, with a blue CK722 (this should be scary for you, since we both seem to think alike), and a Philmore 2 Transistor radio kit.


Scary it is. What else have we done?? (But I don't have a Philmore 2 Transistor radio kit.)

And that was a nice find "Norm_N_Tam" - I surprised I didn't see that or I probably would have built it.

Al

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 Post subject: Re: One Tube Receiver
PostPosted: May Wed 29, 2019 7:50 pm 
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As long as the subject is "One Tube Receiver" here is another one. I can't
remember when I built this but it must be 20 or 30 years ago. It is in the
August 1960 Popular Electronics magazine. (Isn't it great that these
magazines are online today!)

https://www.americanradiohistory.com/Ar ... 960-08.pdf

For such a simple receiver it actually plays quite well when connected to a
decent amp.

Al


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 Post subject: Re: One Tube Receiver
PostPosted: May Wed 29, 2019 8:12 pm 
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Nice work! Here's a 3 tube Regen I helped design, and then built several years ago. With my random length 240' longwire on my back acre, it oscillates and grabs stations across the dial.


Attachments:
Front view.jpg
Front view.jpg [ 289.02 KiB | Viewed 752 times ]
Rear view.jpg
Rear view.jpg [ 396.33 KiB | Viewed 752 times ]

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 Post subject: Re: One Tube Receiver
PostPosted: May Wed 29, 2019 8:48 pm 
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WOW - very nice !! Great looking front and chassis layout. Lots of fine wire on
that coil, must have been fun to wind.

Rewind your coil and you might be able to hear this one. I think the xtal and
coil in it now are for 40 meters, and the tube a 6F6.

Al


Attachments:
TX-Front.JPG
TX-Front.JPG [ 122.02 KiB | Viewed 746 times ]
TX-Rear.JPG
TX-Rear.JPG [ 119.62 KiB | Viewed 746 times ]

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 Post subject: Re: One Tube Receiver
PostPosted: May Wed 29, 2019 9:20 pm 
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Did you build that? Here's a pic of the high tech coil winder I used to wind my coil;


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Hi-Tech coil winder.JPG
Hi-Tech coil winder.JPG [ 310.34 KiB | Viewed 742 times ]

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 Post subject: Re: One Tube Receiver
PostPosted: May Wed 29, 2019 10:57 pm 
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fifties wrote:
Did you build that? Here's a pic of the high tech coil winder I used to wind my coil;


Yes, I built that just before or after I took my license test for novice. (1994)
Well looks like your high tech winder does a good job. I was always going to
make one but never got around to it. You think I would have when I made
a Tesla coil !

Al

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 Post subject: Re: One Tube Receiver
PostPosted: May Fri 31, 2019 8:13 pm 
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I need to build something like that with a submini tube, one of the ones with the single cell type filament requirements. I might waste one of my dirt cheap Soviet tetrodes. Guy had a box full of them at a hamfest once and was selling for fifty cents or a buck each, really cheap. Then I can save my US made ones for what? These are pretty small, inch long and slightly less round than a BIC pen.

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 Post subject: Re: One Tube Receiver
PostPosted: Jun Sat 01, 2019 2:40 am 
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wazz wrote:
I need to build something like that with a submini tube, one of the ones with the single cell type filament requirements. I might waste one of my dirt cheap Soviet tetrodes. Guy had a box full of them at a hamfest once and was selling for fifty cents or a buck each, really cheap. Then I can save my US made ones for what? These are pretty small, inch long and slightly less round than a BIC pen.


I too have wanted to use submini tubes in projects but haven't done so yet. Or even acorn tubes. My subminis are
all US made tubes. Be interesting to see you do something with those Soviet ones.

Al

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 Post subject: Re: One Tube Receiver
PostPosted: Jun Sat 01, 2019 4:40 am 
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There was an article in I think Electronics Experimenter about '57 or '58 for a Super Regenerative receiver in a tiny enclosure, using a Raytheon CK533AX Peanut tube. I had actually bought the tube back then, but never got around to building the receiver. It's on my bucket list though. Here's the schematic. I can email you the article if you want, it's just too big to be able to post here.


Attachments:
super regen receiver page 3 print-p1dc8hsloq1kk1j2j1lo54981jn1.jpg
super regen receiver page 3 print-p1dc8hsloq1kk1j2j1lo54981jn1.jpg [ 126.57 KiB | Viewed 628 times ]

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 Post subject: Re: One Tube Receiver
PostPosted: Jun Sun 02, 2019 2:48 am 
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Here is my old Radio Shack one tube wonder. Still have it.


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1T4.jpg
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 Post subject: Re: One Tube Receiver
PostPosted: Jun Sun 02, 2019 3:15 am 
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fifties wrote:
There was an article in I think Electronics Experimenter about '57 or '58 for a Super Regenerative receiver in a tiny enclosure, using a Raytheon CK533AX Peanut tube. I had actually bought the tube back then, but never got around to building the receiver. It's on my bucket list though. Here's the schematic. I can email you the article if you want, it's just too big to be able to post here.


Hey fifties I would like a copy of that. I'll pm my email address.

Thanks, Al

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 Post subject: Re: One Tube Receiver
PostPosted: Jun Sun 02, 2019 3:24 am 
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Olden Broak wrote:
Here is my old Radio Shack one tube wonder. Still have it.


I like it! I don't recall having any of their tube kits but did have some of the crystal
and transistor kits.

Al

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 Post subject: Re: One Tube Receiver
PostPosted: Jul Thu 04, 2019 10:54 pm 
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Olden Broak- I have one of those too! Built it back in the early 70s, IIRC.

Scott


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 Post subject: Re: One Tube Receiver
PostPosted: Jul Mon 08, 2019 4:01 pm 
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Als_Basement wrote:
Olden Broak wrote:
Here is my old Radio Shack one tube wonder. Still have it.


I like it! I don't recall having any of their tube kits but did have some of the crystal
and transistor kits.

Al


The last kit I had was an FM transmitter module that never worked. :x

Rob

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