27-08-2019, 04:39 PM
(This post was last modified: 27-08-2019, 04:40 PM by Mike Watterson.)
I've already suggested that at more than 1.5A it's better to buy a ready made PSU. Especially at 5A, absolutely at 10A or more.
Also there are decent very low RF noise 14V 5A, 10A, 20A SMPSUs for two-way radios. The Amateur market ones are better than the ones for illegal CB. Any legal CB will run off 1.5A or even 1A.
Some people use a car or truck battery and a smart charger.
I've used a big transistor on giant heatsink driven by a regulator for 10A for battery replacement. The regulation doesn't need to be good. 14.5V on receive and 13.5V on transmit is fine. Many decent amateur rigs are OK down to 11V (reduced output) and up to 15V or even 16V. Most important aspects are lack of mains hum and lack of RFI, not absolute regulation like logic boards.
Also there are decent very low RF noise 14V 5A, 10A, 20A SMPSUs for two-way radios. The Amateur market ones are better than the ones for illegal CB. Any legal CB will run off 1.5A or even 1A.
Some people use a car or truck battery and a smart charger.
I've used a big transistor on giant heatsink driven by a regulator for 10A for battery replacement. The regulation doesn't need to be good. 14.5V on receive and 13.5V on transmit is fine. Many decent amateur rigs are OK down to 11V (reduced output) and up to 15V or even 16V. Most important aspects are lack of mains hum and lack of RFI, not absolute regulation like logic boards.
