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Remote Station active

The last couple of years I’m facing much QRM from rf devices and bad solar inverters. To the East the noise increase is sometimes up to 20 dB (!) which makes low signals modes likes FSK/MSK and FT8 nearly impossible.

13 ele LFA antenna 144 MHz @ 5 mtr ASL

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Author adminPosted on June 28, 2021June 18, 2024Categories ham

Boost amplifier

My R&S signal generator (SMS) is a very nice generator but output power is limited to +13 dBm and sometimes you need more ….

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Author adminPosted on March 27, 2017June 28, 2021Categories electronics, rf

K3NG Keyer

Finally I finished my ‘new’ keyer based upon the famous K3NG design. I used a standard Arduino Uno board and made my own shield and enclosure.

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Author adminPosted on March 23, 2017March 24, 2017Categories electronics, ham

QRO PowerMeter for 144 MHz PA

For my 144 MHz PA, I wanted to have a separate power meter to monitor outgoing power. Off course I could have bought a BIRD with all slugs but building one yourself gives a more satisfied feeling.

PowerMeter 1
PowerMeter

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Author adminPosted on September 13, 2015September 13, 2015Categories ham, rf

VSWR bridge for Spectrum Analyzer

A VSWR bridge is a very nice add-on to a Spectrum Analyzer when you want (or need) to measure reflection loss of for example an antenne or load (termination).

Home made VSWR bridge
Home made VSWR bridge

The VSWR bridge fits mechanically on a DSA815 Spectrum Analyzer.

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Author adminPosted on December 20, 2013October 10, 2019Categories ham, rf

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