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#1
February 18th 14, 08:22 PM
posted to uk.radio.amateur,rec.radio.amateur.homebrew
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The "Two Transistor challenge" - taking things a bit too far?
In message , gareth
writes There was a time, back inthe 1920s and 1930s, that any active device (valves in them thar days, tubes for the leftpondians) would cost nearly a week's wages for the average working man, and so it was good economical sense to try and use it as many ways as possible simultaneously. Times have changes, and active devices with performance into the tens of MegaHertz are now ten-a-penny, so what is achieved by competitions such as the "Two Transistor Challenge" where it is the costs of switching (manual, relays) which would be the major outlay? Not carping, just curious. -----ooooo----- BUT BUT BUT, this one has no switching, apart from the Morse Key! ... http://www.vk2zay.net/article/file/1138 How does the receiver work ? DIJ -- Brian Howie |
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#2
February 18th 14, 08:30 PM
posted to uk.radio.amateur,rec.radio.amateur.homebrew
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The "Two Transistor challenge" - taking things a bit too far?
"Brian Howie" wrote in message
... In message , gareth writes http://www.vk2zay.net/article/file/1138 How does the receiver work ? My assumption (YMMV) is that the key increases the power from the oscillator on TX (and thus will cause a tracer on RX and on QSK operation), the FET being used to switch RIT in and out. |
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