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Weird Mobile Problem
You obviously don't have a common ground. The only 'ground' you have is
from the antenna mount, via the coax shield, to your radio. When you hook your ground post to the chassis you have extended the 'ground' and caused a higher swr. Try running a ground strap to a common metal point on the vehicle...if you can find one these days. Check with ohm-meter and make sure as much of the car as possible is connected together. Of course you will probably have to retune the antenna now. Dan/W4NTI "Michael J. Donohue VE3YF" wrote in message ... Hi: I have suddenly developed a weird mobile setup problem. When my IC-706 is in the car and antenna (HF) is hooked up, everything is all is ok ie swr. But when I hook up the ground wire from the frame of the car to the ground post I now get get high swr. I have checked the antenna system with an analyzer and it appears ok. Any idea's??? 73 De Mike VE3YF |
You obviously don't have a common ground. The only 'ground' you have is
from the antenna mount, via the coax shield, to your radio. When you hook your ground post to the chassis you have extended the 'ground' and caused a higher swr. Try running a ground strap to a common metal point on the vehicle...if you can find one these days. Check with ohm-meter and make sure as much of the car as possible is connected together. Of course you will probably have to retune the antenna now. Dan/W4NTI "Michael J. Donohue VE3YF" wrote in message ... Hi: I have suddenly developed a weird mobile setup problem. When my IC-706 is in the car and antenna (HF) is hooked up, everything is all is ok ie swr. But when I hook up the ground wire from the frame of the car to the ground post I now get get high swr. I have checked the antenna system with an analyzer and it appears ok. Any idea's??? 73 De Mike VE3YF |
Hi:
Probably beneficial to clarify something, the antenna is a Hustler attached to a 3 magnet mount type system. This type of system has no physical ground, only capactive type ground. 73 De Mike VE3YF On Wed, 13 Aug 2003 16:19:58 +0000, Michael J. Donohue VE3YF wrote: Hi: I have suddenly developed a weird mobile setup problem. When my IC-706 is in the car and antenna (HF) is hooked up, everything is all is ok ie swr. But when I hook up the ground wire from the frame of the car to the ground post I now get get high swr. I have checked the antenna system with an analyzer and it appears ok. Any idea's??? 73 De Mike VE3YF |
Hi:
Probably beneficial to clarify something, the antenna is a Hustler attached to a 3 magnet mount type system. This type of system has no physical ground, only capactive type ground. 73 De Mike VE3YF On Wed, 13 Aug 2003 16:19:58 +0000, Michael J. Donohue VE3YF wrote: Hi: I have suddenly developed a weird mobile setup problem. When my IC-706 is in the car and antenna (HF) is hooked up, everything is all is ok ie swr. But when I hook up the ground wire from the frame of the car to the ground post I now get get high swr. I have checked the antenna system with an analyzer and it appears ok. Any idea's??? 73 De Mike VE3YF |
"RFburns" wrote in message ... On Wed, 13 Aug 2003 17:06:05 -0500, Dan/W4NTI wrote: You obviously don't have a common ground. The only 'ground' you have is from the antenna mount, via the coax shield, to your radio. When you hook your ground post to the chassis you have extended the 'ground' and caused a higher swr. Why, Dan, you actually know what you are talking about this time! Inhaling those nerve gas remnants has apparently caused your synapses to reconnect in ways that lead to valid insights into RF problems. Next, you'll be registering as a Republican. Dang, I didn't mean to show off. Didn't mean to ruin my image, and all that. And BTW I'm not registered but I vote mostly Republican. Dan/W4NTI |
"RFburns" wrote in message ... On Wed, 13 Aug 2003 17:06:05 -0500, Dan/W4NTI wrote: You obviously don't have a common ground. The only 'ground' you have is from the antenna mount, via the coax shield, to your radio. When you hook your ground post to the chassis you have extended the 'ground' and caused a higher swr. Why, Dan, you actually know what you are talking about this time! Inhaling those nerve gas remnants has apparently caused your synapses to reconnect in ways that lead to valid insights into RF problems. Next, you'll be registering as a Republican. Dang, I didn't mean to show off. Didn't mean to ruin my image, and all that. And BTW I'm not registered but I vote mostly Republican. Dan/W4NTI |
Changes nothing, just enhances the problem. My info is still accurate. If
you want to continue using that 'mount'. Fine. But you still need to GROUND EVERYTHING on the chasis of the vehicle. That is STILL the problem. Strap it all together. Dan/W4NTI "Michael J. Donohue VE3YF" wrote in message ... Hi: Probably beneficial to clarify something, the antenna is a Hustler attached to a 3 magnet mount type system. This type of system has no physical ground, only capactive type ground. 73 De Mike VE3YF On Wed, 13 Aug 2003 16:19:58 +0000, Michael J. Donohue VE3YF wrote: Hi: I have suddenly developed a weird mobile setup problem. When my IC-706 is in the car and antenna (HF) is hooked up, everything is all is ok ie swr. But when I hook up the ground wire from the frame of the car to the ground post I now get get high swr. I have checked the antenna system with an analyzer and it appears ok. Any idea's??? 73 De Mike VE3YF |
Changes nothing, just enhances the problem. My info is still accurate. If
you want to continue using that 'mount'. Fine. But you still need to GROUND EVERYTHING on the chasis of the vehicle. That is STILL the problem. Strap it all together. Dan/W4NTI "Michael J. Donohue VE3YF" wrote in message ... Hi: Probably beneficial to clarify something, the antenna is a Hustler attached to a 3 magnet mount type system. This type of system has no physical ground, only capactive type ground. 73 De Mike VE3YF On Wed, 13 Aug 2003 16:19:58 +0000, Michael J. Donohue VE3YF wrote: Hi: I have suddenly developed a weird mobile setup problem. When my IC-706 is in the car and antenna (HF) is hooked up, everything is all is ok ie swr. But when I hook up the ground wire from the frame of the car to the ground post I now get get high swr. I have checked the antenna system with an analyzer and it appears ok. Any idea's??? 73 De Mike VE3YF |
Is there any way to vote OTHER than Republican?
"RFburns" wrote in message ... On Wed, 13 Aug 2003 17:06:05 -0500, Dan/W4NTI wrote: You obviously don't have a common ground. The only 'ground' you have is from the antenna mount, via the coax shield, to your radio. When you hook your ground post to the chassis you have extended the 'ground' and caused a higher swr. Why, Dan, you actually know what you are talking about this time! Inhaling those nerve gas remnants has apparently caused your synapses to reconnect in ways that lead to valid insights into RF problems. Next, you'll be registering as a Republican. |
Is there any way to vote OTHER than Republican?
"RFburns" wrote in message ... On Wed, 13 Aug 2003 17:06:05 -0500, Dan/W4NTI wrote: You obviously don't have a common ground. The only 'ground' you have is from the antenna mount, via the coax shield, to your radio. When you hook your ground post to the chassis you have extended the 'ground' and caused a higher swr. Why, Dan, you actually know what you are talking about this time! Inhaling those nerve gas remnants has apparently caused your synapses to reconnect in ways that lead to valid insights into RF problems. Next, you'll be registering as a Republican. |
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