23 December 2011

So, your expensive piece of technology had a bath?

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Picture by Patrick Hoesly . It happens. Sometimes technology packed expensive electronic equipment (decide to) get in touch with liquid ...
19 December 2011

UV-3R data cable (homemade)

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I had ordered an USB-to-UART TTL adapter to debug the rotary encoder on the Frequency Reader. While it was on the way to my lab, I solved th...
18 December 2011

New frequency formatting for I.F.R.

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My development board with the new display ... and new display too. On the I.F.R. firmware I have modified the way the frequency is disp...
05 December 2011

TX-only transverter for 4m - with mixer

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The picture shows my TX-only transverter with the diode ring mixer (SBL-1 or ADE-1) component added. The circuit has not grown a lot, but it...
01 December 2011

TX-only transverter for 4m

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While I have no news about a possible 4m allocation for Italy in the next months, I have started working on my TX-only transverter - a ...
29 November 2011

UV-3R VHF second harmonic

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Definition : a second harmonic is a spurious emission of a transmitter located at twice the fundamental frequency (or first harmonic or ...
28 November 2011

Back up pictures during long trips

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I have had an interesting chat about methods for preserving your digital pictures (movies) while being out on an important and long trip. I...
21 November 2011

Fast knob rotation solved

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Good news: I have solved the puzzle of missing steps with fast rotary encoder rotations. It was a piece of inefficient code, which has now b...