hwa battery insert

A multiband EFHWA for amateur radio - How-To make a multiband EFHWA for ham radio by KC2UHB

Las Vegas Rural Nevada Highway Patrol - Live feed for NHP rural areas of Moapa Laughlin Primm Alamo Indian Springs

HSMM-MESH - A high speed, self discovering, self configuring, fault tolerant, wireless computer network that can run for days from a fully charged car battery with focus on emergency communications

Battery Bank - Specialize in batteries and batteries charges

Solar panels test - Solar panels test for portable battery charger by YO4HHP

Home Brew 9 Volt Battery Clip - Make your own battery clip by nj2x

Adjustable Regulated Battery Charger - This battery charger circuit is regulated and adjustable to make this circuit able to charge the mosto NiCAD battery.

A NiCAD Battery Charger - A NiCAD Battery Charger with Current and Voltage Limiting

ZL2PD CMOS Keyer - Two cheap CMOS ICs and a few transistors was all that was required to rebuild an elderly TTL automatic morse keyer into a low current lightweight battery powered iambic morse keyer.

Find RFI causes in mobile operations - Troubleshooting your power supply, in determinig connections to battery, alternator and regulator interference and checking power supply leads.

Germanium Noise Generator - This generator requires 100volts supply at 5mA. A 0 -5 mA meter inserted at J1 measures the crystal current.