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In his April 2025 column
Protect Your Station with the Smart Power Switch SPS-1
Undervoltage Monitoring: Prevents erratic operation when your power supply sags
With the Basic circuit board
reliable protection with industry-standard Anderson Power-Pole connectors
MiniBar 15-16 Crowbar Circuit - Full Kit In his April 2025 columnApril 2026 Update: I am working to find a low volume and tariff friendly supply source for the PC Boards. I am hoping to have them back in stock by late summer. I apologize for any inconvenience this causes and I appreciate your patience. Protect your radio from power supply failures with this crowbar circuit! It can be set to trip at 15 or 16 volts. The circuit is designed to operate with typical power supplies operating at 13. 8 volts. In his April
US$ 25.00
US$ 10.50
US$ 51.00
