Collaborate Disseminate
A lot of hams like to carry a VHF radio. Of course, nearly everyone wants to carry a phone. Now, thanks to the kv4p HT, you don’t have to carry …read more Continue reading A Phone? A Ham Radio? Relax! It’s Both!
[DrMattRegan] has started a new video series to show his latest recreation of a Commodore VIC-20. The core of the machine is [Ben Eater’s] breadboard 6502 design. To make it …read more Continue reading A VIC-20 with no VIC
[Igor] made a VU meter with LEDs using 8 LEDs and 8 comparators. This is a fast way to get one of 8 bits to indicate an input voltage, but …read more Continue reading Approximating an ADC with Successive Approximation
If you are involved in any sort of radio transmission, you probably have at least heard of SWR or standing wave ratio. Most transmitters can measure it these days and …read more Continue reading What’s Your SWR? Are You Sure?
It used to be you could crack open a TV or radio and really work on the components inside. The smallest thing in there was maybe a disc capacitor a …read more Continue reading Repairing a Component on a Flex Connector
It used to be you could crack open a TV or radio and really work on the components inside. The smallest thing in there was maybe a disc capacitor a …read more Continue reading Repairing a Component on a Flex Connector
When you think of tennis, you probably think of Wimbledon, the All England Club’s famous competition that has run for 147 years. Part of that history has always been line …read more Continue reading Wimbledon Goes Automated
[John Graham-Cumming] might not be the first person to thumb through an old book and find an IBM punched card inside. But he might be the first to actually track …read more Continue reading The Punched Card Detective
The Braun TS2 radio was a state-of-the art tube set in 1956. Today it still looks great, but unsurprisingly, the one that [Manuel Caldeier] has needed a little tender loving …read more Continue reading Braun TS2 Radio Turns 68, Gets Makeover
Remember Duracell’s PowerCheck? The idea was that a strip built into the battery would show if the battery was good or not. Sure, you could always get a meter or …read more Continue reading What Happened to Duracell PowerCheck?