31 December 2012

IFR, Knob evolution

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2012 Xmas season has taken me back to the IFRK code, so that transverter functions would be finally included, paving the way to a long-await...
18 December 2012

Beach40 - oscillator waveforms

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The Beach40 is a simple QRP DSB transceiver for 40m, designed by Peter VK3YE who released 4 youtube videos about it. In the first video Pete...
17 December 2012

ADS-B with RTLSDR devices

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T he team behind SDR# application has released a lightweight receiver software for 1090 MHz ADS-B signals that uses an RTLSDR device right a...
12 December 2012

CAT Bluetooth for FT-890 and FT-840

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I have been asked if the CAT Bluetooth dongle for FT-8x7 could work with an FT-890 too in this configuration: one dongle owned either F...
10 December 2012

Two beacons in one shot

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I should consider myself lucky since I have a local 23 cm beacon to test my homemade biquad antenna. While aiming it, trying to discern ref...
28 November 2012

Keyer "in crosta di sale"

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CQWW CW contest is one of those events that can be tackled with a simple 2- memory keyer : callign in one, "CFM 599 TU " in the ot...
27 November 2012

Troubleshooting the biquad

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F irst thing I checked on the biquad was the continuity of the coax+antenna setup. Electrically the quad is a short circuit, so meas...
21 November 2012

Nothing beats the good ol' dipole(?)

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L ast night I monitored 1296 MHz with the RTLSDR receiver and the homebuilt biquad antenna, fixed in one direction. Apart from a strong stat...