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| 1,000 Watt Antenna coil | |
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| Tweet Topic Started: Wednesday, 6. May 2015, 13:55 (1,040 Views) | |
| Deleted User | Wednesday, 6. May 2015, 13:55 Post #1 |
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![]() 1KW Coil from a Silver Rod Seems like a bit of a stretch. Don't get me wrong I like the Silver Rod but saying it can take 1,000 Watts might be a bit of a stretch of the truth. For how long ? 0.1 seconds Of course no one is actually using 1kw with one but I doubt that thin wire could take 1kw for long before it melted. I suppose it ultimately depends on what kind of volts and amps you see on a radiating element. Maybe it is all volts and very low amps so there is little heat in the coil ? |
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| Deleted User | Thursday, 7. May 2015, 13:26 Post #2 |
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I wonder if it is possible to replace the wire on this coil with better quality/thicker wire and still get it to SWR in ok? If so and I put thicker wire around it with the same number of turns would it have the same inductance value ? I imagine the thickness of the copper core/spacing between the copper coils from thicker wire could create a slightly different value to the coil. The DB would this be something worth doing or are any gains largely pointless. i.e. does thicker coil wire reduce coil losses or only effect power handling ? Thanks in advance. In comparison the HP5000 mobile antenna has a nice thick copper coil in it. (Can take 1.5KW supposedly)
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| The DB | Thursday, 7. May 2015, 14:18 Post #3 |
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When it comes to coils there is more than just the coils inductance in play. Coils also have a certain amount of capacitance as well. This capacitance comes from the spacing of the wires. Using a larger diameter wire to replace a smaller diameter wire will have two effects outside of the amount of current the coil can handle.
The DB |
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| Deleted User | Thursday, 7. May 2015, 17:11 Post #4 |
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Ok thanks for the clear advice as always The DB, it is always more complex than meets the eye. It will be left as is, fortunately it sees nothing like 1KW, lol. |
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| Deleted User | Friday, 8. May 2015, 14:58 Post #5 |
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I just want to add I think these are excellent antennas for the money irrelevant to how long the coil could take 1KW for. I would buy one again if mine broke, which it shows no signs of doing and it must have been up and down 5-6 times so far. I easily like it as much as my Gain Master. |
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| MadMark1 | Friday, 8. May 2015, 15:35 Post #6 |
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163 Charlie Tango 020
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Ive put 1200 watts up an Antron 99 without any problems, Although it did snap in the wind at the brass threads between the bottom and middle section.. Ive also put 300 watts into a Dia-A-Match... that didnt last long.. Ha.. That coil though, Doesnt look like it will take a 1000 watts, Not to me.. Ide be cautios with a few hundred.. ![]() Mark |
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Gw0wvl http://www.qrz.com/db/GW0WVL Facebook https://www.facebook.com/groups/1568501233420524/ My Youtube site ... http://www.youtube.com/MrMadjones My website ... http://mjmotorbikes.weebly.com/ My Radio website http://gw0wvl.weebly.com/ "It's not the class of license that the Amateur holds but the class of Amateur that holds the license" | |
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| Deleted User | Sunday, 10. May 2015, 17:59 Post #7 |
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Someone mentioned they can take at least 700W in practice so there you go. Not bad going. |
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| Hurricane Harry | Sunday, 30. August 2015, 14:48 Post #8 |
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I thought I was tuning up my new amplifier into the large dummy load on 10m, giving out 1,400W. I didn't realised that my antenna switch was in the wrong position (for silver rod) and not into the dummy load! I checked the coil and choke balun straight away, thankfully there was no sign of burning, scorching or flash-over damage. It still works okay and the SWR is 1.2:1.
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| RadioDaze | Tuesday, 1. September 2015, 15:59 Post #9 |
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Good for you and thanks for the input. |
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| Hurricane Harry | Tuesday, 8. September 2015, 15:18 Post #10 |
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It's not something I care to repeat.
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8:49 AM Jul 11
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I checked the coil and choke balun straight away, thankfully there was no sign of burning, scorching or flash-over damage. It still works okay and the SWR is 1.2:1.

8:49 AM Jul 11