29 October 2009

Doubling to 6m

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SPRAT 140 magazine had an article by G3XBM's Sixbox 50 MHz AM transceiver. It is also documented on this blog/website. His TX is a 3rd ...
28 October 2009

The EX-OR frequency doubler

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A fter few years I've had this idea in mind, I could finally melt some solder and put together a frequency doubler using EX-OR digital g...
26 October 2009

FT817 keypad - a completed one

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I have built one of my FT-817 keypads for another person, and here's how it looks like when unassembled: I have included connectors on t...
08 October 2009

DTT switch-over

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2 009-10-07: switch over from analogue over-the-air TV to digital (DTT, DVB-T) in my area. I grabbed the TV remote control and scanned all p...
17 September 2009

Inside Gould 4072 DSO

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In August this year I have received a Gould DSO model 4072, 100 MHz bandwidth, 400 MSPS. It is a totally different concept of oscilloscope ...
03 August 2009

QRP from Rab Island (2009)

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T his note will look old, since more than one month has passed since we've returned back home. But at least will report what I have done...

Alpe Adria VHF 2009: mission aborted

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E very year I can hardly wait for Alpe Adria VHF contest, the first Sunday in August. After my best performance of year 2008, I wanted to im...
30 July 2009

The word of experience

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Finally I put my Tek 7603 oscilloscope into service. A friend (the one from optical experiments) needed to verify a circuit he's buildin...