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Almost ready for VLF again

Ready again to receive VLF with my new loop. At the moment the antenna is located on the roof under the TX antenna for MF-LF.

The preamplifier circuit comes from the easyloop of VLF.IT with an OP27 and few others components.

The antenna is composed by 32 turns of 0.15 […]

136 kHz… finally!

Last night was my second “serious” TX test on 136 kHz, transmitted Opera32 mode after an upgrade to the matcher.

To tune the antenna on 136 kHz I’ve build a couple of inductors over two hand cleaner soap bins. The first one was wound with enameled copper wire of about 1 […]

Increasing TX antenna capacitance

This is my umpteenth upgrade to the TX antenna to try to get better general performance and get the possibility to work on 136 kHz without tons of electrical wires outside the terrace. The new layout is drawn in the next basic picture: I’ve passed from 4 top wire and a single vertical […]

Toroid matching for LF/MF

Since my antenna was born as monoband for 630 meters, until today I’ve used an autotransformer built around the variometer. In these days I’ve tried to tune the antenna on 136 kHz, beginning to put some mH over mH to reach my goal. Arrived to 136 kHz I’ve sadly found that the autotrafo […]

A little upgrade to the 630m TX antenna

To make a clean sweep of spagetti wires on the bottom of the antenna, to make my XYL happier, i tought to use the aluminium strip for the first section of the TX antenna.

After removed copper wires I connected the variometer to an old 4 el triband yagi for HF aluminium boom by a […]

The 630m antenna

In the last weeks I’ve tested a new antenna for 630m band. To have also something usefull for 2200m I’ve built an helical loaded vertical antenna followed by a 3-wires hat, so to have a longer radiator that resonate about on 350 KHz.

The coil was about a 45 meter long 3 cm aluminium […]

Again on the air with WSPR 630m

Tonight was the second night for my new 630 meter antenna test. Thanks to the increase of Lowfers fellows I’ve had the possibility to have more receivers that last year. I’ve been listened by about 40 different stations in more than a dozen of European country.

This image is relative to the night between […]

Wideband Active Small Magnetic Loop Antenna – updated

Wandering on the Internet I found an interesting LZ1AQ kit about a broadband antenna amplifier for small antennas.

I immediately felt that it was a great product also saw the multitude of schemes and research carried out by Chevdar. I then bought a kit AAA and started with the construction of the antenna. These […]

Quagi Antenna for 430 MHz

Added an old antenna project about an 8 elements quagi antenna.

IV3ZEW Wecontrolled tuner

L’immagine si rifersce all’accordatore usato da Sergio IV3ZEW di Trieste per accordare la sua antenna su 80 e 160 in modo molto efficiente. L’accordo fine in automatico è gestito dal mio software WEController che consente una “leggerezza” e spensieratezza d’uso di tale accordatore senza dover ogni pochi KHz riaccordare il sistema.I motori utilizzati da Sergio […]