Introduction
Many years ago (approx. 2003) I built the Elecraft K2 HF transceiver. Normally I keep the internal PS-1229 2.9AHr sealed lead acid battery charged with a 12W marine solar panel located in a nearby window. In order to use the transceiver in the field, I purchased a portable 70W solar panel. The panel feeds a DC/DC converter which feeds the K2. Due to a protection series diode in the K2 battery circuit, PWM regulators can’t be used.
Equipment Configuration
Figure 1 shows the solar panel connection. I found the quick connect DC5521 connectors with screw terminals very handy to make the wiring harness.
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References
#1. – “Elecraft K2 HF Transceiver”
https://elecraft.com/products/k2-the-classic-hf-transceiver-full-kit
