radio – anderswallin.net

RA0SMS mini-whip

New RA0SMS mini-whip antenna on the roof. The old one lasted from 2017/02 to 2018/10.

LF time signals

Time signal reception with a long-wire antenna and a PA0RDT mini-whip antenna. HP89410A analyzer set to 50 Ohm input, 100 Hz span, 1 Hz RBW. The signals are from:

Anthorn
Mainflingen
Allouis

PA0RDT Mini-Whip antenna

Update 2018 October: after some water made it into the bottle the antenna has stopped working 🙁

Antenna in a bottle installed on the roof today. Stay tuned for a future web-SDR...

N-connector through the lid of a plastic bottle.

Black electrical tape to keep water, snow, and ice away?

A 2m piece of Thorlabs 25mm aluminium extrusion as antenna-pole.

An article, some theory, some notes on grounding, some comparisons,

There's also a modernized circuit by PA0NHC

Time-code transmitter

RF power amplifier of DCF77 modulated time-code transmitter.