Questions tagged [dc-power]

Questions about DC power supplied to equipment (typically 12/13.8 volts), power distribution, wiring, connectors.

0
votes
0answers
54 views

Troubleshooting ICOM PS15 Power Supply

I got a power-supply gifted by my friend. When I powered ON, the main (120V) FUSE blows up. I started by disconnecting the transformer from the control circuit and powered ON. This time the fuse is ...
7
votes
3answers
363 views

Understanding power supply requirements

I have a basic question about power supply requirements for typical transceivers. I'm looking at the specs for a Kenwood TM-V71A, which is a 50W mobile transceiver. I figured that a 50W transceiver ...
4
votes
2answers
2k views

Practical differences between switching and linear power supplies?

Power supplies for ham radio equipment (and other equipment of course) seem to come in two flavours: switching and linear. The switching gear tends to be cheaper and smaller as well as more ...
1
vote
1answer
303 views

DC connector type for Baofeng UV5R base charger

What type is the DC jack on the Baofeng UV5R base charger? I want to buy a splitter so that I can charge multiple radios with the same car/wall charger.
2
votes
2answers
2k views

Is it possible to power your ham radio station by solar power? If so, how?

The very first New York Times article announcing the invention of the solar cell by Bell Labs in 1954 shows a man holding a brick-shaped device in the sun in one hand and a microphone in the other ...
1
vote
1answer
87 views

Power supply for small radio board

I need a powersupply for a radio board (I will shield it), and have experienced bad interference from step-down converters. I have been told to use linear regulators (LM317 or LM350) with caps to trim ...
1
vote
1answer
151 views

Using coax for DC, good idea?

I know that it is best to twist the wires that supply DC power to a device, as to decrease the "loop" surface area. This diminishes the amount of RF that gets coupled in the wires as well as the ...
0
votes
2answers
496 views

Regulated Power Supply vs Class 2 AC/DC Adapters

I'm wondering if it would be more efficient for me to replace several AC/DC adapters (linear, non-switching) with a regulated power supply? Two of the adapters get very warm and are rated 9 watts ...
5
votes
1answer
302 views

How can I counter DC-DC inverter noise / ground noise in an electric-vehicle mobile setup?

So, I'm relatively new to all this; and I've gotten an ICOM IC-7100 on sale, which looks like an excellent transceiver … unfortunately, this very specific line shows up in the manual: The ...
3
votes
1answer
467 views

why do some radios have two fuses in the power leads

On a number of fairly modern rigs I've seen that both power leads are fused: Why is this still so? Does this have something to do with some vehicles having a ground-positive system or is this simply ...
0
votes
1answer
87 views

Connecting radio in parallel with inverter in mobile set up

I've just added a leisure battery, split relay and circuit swap loom to a newly acquired Mazda Bongo. Also added was a 1000W pure sine wave inverter, hooked up directly to the leisure battery. That's ...
2
votes
5answers
1k views

How do I separate dovetailed PowerPole housings?

Anderson PowerPole connector housings can be joined side-to-side using dovetail joints molded into the plastic to make a multi-conductor connector, as seen in the conventional amateur radio 12V power ...
4
votes
3answers
590 views

On Anderson Powerpoles, does the red on go on the left or right?

When attaching a red and black pair of Powerpoles together, which way should I do it to ensure that it will plug into the most number of other people's gear? When looking from the top of the ...
2
votes
2answers
149 views

Ham Variable Lab Power Supply

I'm looking into purchasing a mobile radio (TYT TH-9800) for my Jeep Wrangler. I am hoping to be able to use it in my apartment as well. Since I'm going to need a power supply for this, I think it ...
8
votes
3answers
9k views

Should I ground my radio to the chassis or battery for a mobile install?

From what I've seen, there are generally two ways to power a mobile radio: Positive lead to battery, negative lead grounded to chassis Both positive and negative leads to battery I know that ...
3
votes
1answer
117 views

Are the Icom 2300 h and Ftm 400dr DC cables interchangable?

I would like to swap out my 2300h to a 400dr. Would rather not swap out dc power cable. Are the cables the same or is there an adapter for make it possible?
8
votes
3answers
167 views

What sources of power are useful in emergency situations?

Situations that call for emergency operating usually have some hams working in field conditions. Relying on the mains grid could be problematic. A lead-acid battery would probably be heavy to lug ...