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Author Topic: Power Cable for a FT-817ND  (Read 2437 times)
SCARPAD
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Posts: 28




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« on: August 01, 2013, 06:47:58 AM »

Just bought an 817 and I noticed the supplied cable is not fused. I have a rig runner I could use, but if I wanted to go directly to a 9ah Battery, with Power poles I should probably put fuses in line no ?
What's the best method for doing this ?
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K6LCS
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« Reply #1 on: August 01, 2013, 07:29:19 AM »

The '817's power plug is available at Radio Shack - part number 274-1532 4.0x1.7mm coaxial, tip positive. I would use 5A inline fuses on both the positive and negative leads.

W4RT sells a replacement, non-fused cable for less then ten bucks that you could use: http://www.w4rt.com/

In the June, 2005 issue of QST magazine there was an article by Phil Salas AD5X, entitled “Input Voltage Conditioner – and More – for the FT-817″. It details a project to add reverse voltage, over voltage, and over current protection, a more convenient power connector (Anderson PowerPoles) and an external voltage regulator to take the much of the heat dissipation from the inside of the rig to the outside. For over five years N1BQ offered the parts as a kit. Not sure if he still is.

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Clint Bradford, K6LCS
http://www.work-sat.com
K6LCS
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« Reply #2 on: August 01, 2013, 07:44:32 AM »

I knew I saw Phil's construction article SOMEWHERE for improving the FT-817's power input jack - converting it to PowerPoles - while adding conditioning and polarity protection to your rig. It is on the DOCS page at ...

http://www.k6lcs.com

Clint K6LCS
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Clint Bradford, K6LCS
http://www.work-sat.com
AD5X
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Posts: 1430




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« Reply #3 on: August 01, 2013, 09:50:06 AM »

I knew I saw Phil's construction article SOMEWHERE for improving the FT-817's power input jack - converting it to PowerPoles - while adding conditioning and polarity protection to your rig. It is on the DOCS page at ...

http://www.k6lcs.com

Clint K6LCS

It is also on my website at www.ad5x.com.

Phil - AD5X
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AE5QB
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Posts: 269




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« Reply #4 on: August 01, 2013, 01:40:35 PM »

The power conditioning article is a good one so if you want to take the project that far, go for it.  A more direct answer to your question is yes you should fuse any power line.  It should be fused as close to the source as possible.  Both sides of the line should be fused.  The way I do it is to use spade connectors that attach directly to the battery tabs.  I put these on the end of an inline fuse assembly.  Two of these fuse assemblies will connect together to give you one set of cables.  On the outputs of the fuse assemblies, put a pair of PowerPoles.  Then connect a second set of PowerPoles to your FT817 power cord.  The tabs on the battery are a somewhat weak link so you don't want to be pulling cables off and pushing them back on a lot.  Leave the fuse assembly pretty much permanently attached to the battery and just plug your radio or charger into the PowerPoles as needed.  It should look something like this:

FT817 + ----->>--Fuse--[ + battery
FT817 - ----->>--Fuse--[ - battery

>> = PowerPoles
[ = Spade connector
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