Amateur Radio

It was my first attempt at building a shortwave crystal radio. Shortwave Crystal Radio It's single-tuned and uses a 1N270 to drive...

Here's the portable version of my  'Series-tuned Crystal Radio' . Portable AM Crystal Radio The prototype was wired on a p...

Here's the schematic of the minimalist version of my  'UHF Crystal Radio' . Minimalist UHF Crystal Radio - Schematic It wa...

This is the compact version of my  'Loudspeaker Crystal Radio' . Compact Loudspeaker Crystal Radio Trials on a number of assor...

A makeshift piezo earphone arrangement comprises a stethoscope and a piezo transducer. Stethoscope The sound emanating from the transd...

'A Series-tuned Air-core Coil Crystal Radio'  and  'Another Series-tuned Air-core Coil Crystal Radio'   have been made simpl...

This is the air-core coil version of my  'series-tuned crystal radio with alternative detector' . Series-tuned Air-core Coil Cry...

This series-tuned crystal radio was built using parts salvaged from a vintage / battered SCR - 578 lifeboat radio (popularly referred to as ...