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77
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eHam Forums / Satellites / RE: Two radios, two antennas, one computer program.
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on: April 15, 2010, 06:08:12 AM
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when adjusting for doppler, you only vary one side of your conversation, either the uplink or the downlink. If you attempt to vary both, then you'll end of fighting each other and get lost.
Most ops vary the receive and leave the transmt alone. Make sense?
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78
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eHam Forums / Elmers / RE: Building a radial plate for ground-mount 5btv
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on: April 06, 2010, 06:04:17 AM
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The metal will rust. Use a piece of copper tubing bent into a circle around your antenna. Solder or bolt your radials to that as well as the grounding wire connecting it to the antenna ground lug. Solid wire is good, flat copper strips are best.
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80
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eHam Forums / Elmers / RE: Grounding a wire dipole antenna?
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on: April 06, 2010, 06:02:06 AM
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Again, nothing will save you from a direct hit if your equipment is hooked up. Static charges are not the same as a direct hit.
OK hotshot expert. I guarantee that I will replace every piece of equipment taken out by a strike to my system. In over ten years in place, I NEVER disconnect and NEVER have had a problem. I take direct strikes all the time. Please tell my why this is?
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81
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eHam Forums / Station Building / RE: Water Pipe Must Be Connected to Ground Rod?
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on: April 05, 2010, 09:18:47 AM
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I am putting in a new HF antenna (20 meter dipole). I am running the coax off the roof and trying to figure out the "proper" ground...both RF and Safety (compliant).
"No need for an RF ground since the dipole is a balanced antenna."
The house electrical is grounded to the cold water pipe. Do I:
1)Use that cold water pipe?
"No bond to the electrical ground wire."
2)Put a eight foot copper pipe in the ground and use that?
"Yes, I would."
3)If I use the ground rod do I have to bond that rod to the water pipe/house ground? If so, how long can the run of wire between the ground rod and water pipe be? I would have to be over 40ft in my case if the ground rod had to be by the point of entry.
"That would be fine, use only an outdoor path and avoid any sharp bends. You'll be fine."
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86
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eHam Forums / DXing / RE: Getting heard
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on: March 23, 2010, 10:24:21 AM
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Besides improving operating technique (which you are inherently doing by your imposed limited setup) the only other things you can do and you should strive to do, in the this order:
Better antennas (type and height)
More Power
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89
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eHam Forums / Elmers / RE: Serbia
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on: March 11, 2010, 07:13:17 AM
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But a 1980 contact with Slovenia counts are which of these entities?
It counts for whatever was the official country at the time of the contact; it does not change later if a country changes.
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90
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eHam Forums / Elmers / RE: Serbia
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on: March 10, 2010, 05:57:58 AM
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What puzzles me is that a 1980 QSO with what is now Slovenia counts as Serbia today.
No that's wrong. That Slovenian contact is a contact with the former country of Slovenia. Deleted country QSLs do not change to the newest form of the country, they stay as is.
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