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,...
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,...
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...
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...
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...
National was founded in 1914 as “The National Toy Company”, but by 1916 had broadened their range and renamed themselves as the “National Company Inc”. By the 1920s, they made a start into radio...
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,...
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...
Although the mismatch between 50 Ohm and 75 Ohm systems are usually acceptable, it’s easy to obtain a near perfect match using a pair of twelfth wave lines. The nice part is you only...
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...
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