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Papakura Radio Club inc.& NZART Branch 65, Papakura.1 Great South Road, Papakura. |
Project evenings
The Papakura Radio Club holds project evenings throughout the year. These evenings are normally on the 2nd Wednesdays of the month and additional evenings are sometimes on the 4th Wednesday. Local Amateurs and visitors are welcome to join in these activities.
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Power PanelThought you may be interested in this... I was thinking of buying a commercial DC power distribution panel to connect all the rigs to my power supply then thought maybe I could make one see attached pics 
A project for PRC ??? LOOK no Micro.....maybe I should look at using a micro to display the current through each circuit!! To continue some thoughts and problems... I was a bit concerned that the input fuse holder may not be man enough to handle the 30 or so Amps so I decided to do a test on it to see if it could Couple of photos below shows what I made and the load measured the volts across the bottom of the PCB at the wire connections voltage drop with a 0.4 ohm load current was around the 30 Amp mark was interesting that I was dropping nearly 0.6 volts across the cables and fuse holder so the DC volts at the load was 11.98 So the volts across the fuse holder made from 2 spade connectors With a short circuit 0.04 volts with a 30A fuse 0.09 volts with a 25A fuse 0.12 volts so at 30 amps with a short circuit fuse (well as best I as I could make) the power dissipation in the holder was 1.2W 
Hummm its does get warm and it gets really warm (read HOT) with a 25A fuse (I suppose I'm asking a little much with 30A through a 25A fuse of course it will get hot....) I dont think the fuse holder as I have made it is too big an issue but the fuse is if it has to run with 30 A through it for long periods of time. Hope this is of interest.... Keith Dix ZL1BQE
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How to contact us:
Papakura Radio Club inc.
1 Great South Road, Papakura
P.O.Box 72397, Papakura 2244
(09) 2989297
E-mail [email protected]