First SOTA with Yaesu FT-857D

On this activation I logged contacts on 10, 20 and 40 meters. As I had the necessary battery power (4.2Ah LifePo) and 100W  TX power I spent a bit of time working DX on 20mt in the afternoon - unfortunately none of them were SOTA chasers.

This was the first time that I completely drained my batter...

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Icom Tuner connectors


Manual Icom Tuner

Many Icom radios (e.g.7100) have a connector for automatic tuners such as the Icom AH4. The cable supplied by Icom is of a fixed length (10m) and is not shielded. Icom recommends to use shielded cable for any length greater than 10m.

The cable is nothing special and doesn't...

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Level Adjustments for PSK

Adjusting audio levels for digital modes is a very important component of digital mode setup. On voice transmissions other operators will point it out when there is a problem with your audio but not so on PSK. Is very difficult to pick a modulation problem by listening to the audio, certainly beyond...

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RF Sampler and Demodulator

A simple RF sampler and demodulator is a handy tool for the shack, in conjunction with an oscilloscope it allows the operator to keep an eye on the station output.

Here is a simple circuit which provides a an RF sample output and a Demod output:

RF Sampler Circuit (credit W2AEW)

Watch thi...

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