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Homebrew Equipment A place to show, design and discuss the weird and wonderful electronic creations from the hands of individual members. |
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18th Jul 2016, 1:22 pm | #1 |
Rest in Peace
Join Date: Mar 2006
Location: N.W. Oxfordshire(Chipping Norton)
Posts: 7,306
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Photos of my Homebrew SW Receiver
The photos are of the radio in it's present, partly dismantled state. As I mentioned in the 'Denco(Clacton)Ltd.' thread (Components & Circuits), more than 40 years ago I built a multi-band RX using Denco plug-in coils to a design published in PW. Time (and inclination!) permitting, I may try and get it working again! The first two pictures are of the 1.6Mhz I.F. strip, 3rd, 4th., & 5th., are front, reay & side views of the complete radio. On theRH side as viewed from the front are DIN Sockets for Speaker, 9v DC PSU, and audio o/p to a (cassette) recorder. The RX incorporates a BFO/Product detector mounted under the chassis, and a 1.6Mhz Xtal filter extra I.F. stage, which I've mislaid.
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19th Jul 2016, 9:20 am | #2 |
Rest in Peace
Join Date: Mar 2006
Location: N.W. Oxfordshire(Chipping Norton)
Posts: 7,306
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Re: Photos of my Homebrew SW Receiver
The radio was built to a design published in PW in the early 1970s, IIRC about 1972 over two or three issues. I'm not sure who designed it, possibly David Gibson, or one of the other then regular contributors. By changing the RF, Mixer, & Oscillator coils, it could receive broadcast and amateur transmissions from 150kHz to 30Mhz, and, at different times over the years I had lstened to several S. American stations on the tropical bands (early in the morning!), various Amateurs, including once an Argentinian, then, in the early 80s CB(AM of course). All of these using either an Indoor Long Wire aerial, or a vertical Telescopic rod coupled to a homebrew ATU (Don't know what happened to that!) coupled to the above RX via PL259 plug/SO239 Socket, the latter connected to the aerial circuit of the RX via a low-value mica capacitor. I'd be interested to see pictures and read descriptions of any other receivers built to the above design.
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19th Jul 2016, 11:23 am | #3 |
Heptode
Join Date: Sep 2013
Location: Manchester, UK.
Posts: 862
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Re: Photos of my Homebrew SW Receiver
This definitely deserves to live again!
Regards, Paul
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...No, it's not supposed to pick up the World Service, it's not a radio! |
19th Jul 2016, 1:25 pm | #4 |
Nonode
Join Date: Oct 2010
Location: Tintinara, South Australia, Australia
Posts: 2,340
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Re: Photos of my Homebrew SW Receiver
Looks like the FG Rayer design from 1976.
Would be nice to see it up and running again. Terry VK5TM |
19th Jul 2016, 4:59 pm | #5 |
Rest in Peace
Join Date: Mar 2006
Location: N.W. Oxfordshire(Chipping Norton)
Posts: 7,306
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Re: Photos of my Homebrew SW Receiver
It's case of 'one day, maybe, Terry. So many other calls on my time, and I'm supposed to be retired!) due to ongoing repair jobs and other things, besides which I've yet to find the extra Xtal Filter I.F. stage, though the radio will work without it, and replace an extension spindle & coupler which I removed ages ago to use on something else. In addition, there are four OC170(AF117) transistors which will almost certainly need replacing. Maybe later in the year I'll get around to doing something with the radio, and even look out the issues of PW with the relevany constructional articles!
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