HAM Radio site Blog

Bench AF Amplifier 0

Bench AF Amplifier. Schematic Diagram.

The circuit… This circuit consists of just a few discrete components and one common IC amplifier – the LM380N. It’s simple, cheap, quick to build and works well. I built mine in a steel,...

Thomas Edison 0

A.C Electricity …and why I hate it!

When I say A.C electricity I mean the kind of high-voltage stuff we have in our homes. So before anybody says: “Well, aren’t radio waves a form of A.C?”, let me explain what I...

Sony ICF SW100 0

Multiband Receiver Sony ICF SW100 (Review)

This was a single-chip radio manufactured in the 1990s and early 2000s. It was marketed as a “world-band receiver”. It covers 150kHz to 30MHz and FM from 76MHz to 108MHz. The set decodes stereo...

Old Lightning Arrester Advertthe 0

Lightning and other mishaps

About a year or so ago, I was presented with a Philips transistor radio that according to the owner had been struck by lightning. Fortunately, the lightning strike must have been quite some distance...

5 element quad for 2m band 0

5 element quad for 2m band

Boom Length – 1651 mm Distance between: Between Distance, mm R – V 432 V – D1 330 D1 – D2 406 D2 – D3 483 Dimenson of elements: Side, mm Diagonal, mm Perimeter,...

QRP Dummy Antenna 0

QRP Dummy Antenna

I needed a small dummy antenna for testing my Elecraft K2. It was to be small and capable of being used into the VHF range. It had to have a BNC connector, and it...

Optimus Pro CS 5 0

Communications Speakers

Have you searched and searched for a good speaker for your ham radio? That perfect speaker that would let you hear voices through the noise and static without hiss? A speaker that isn’t fatiguing...