Home |
Search |
Today's Posts |
|
#1
|
|||
|
|||
I used to run mobile in a SL-1 using Hamsticks and the Hustler mobile
antennas. Where and how did you mount the antenna? I used a lip mount on the trunk hood [which is metal] and three different ground straps from the trunk hood to various points on the frame. Deacon Dave, W1MCE Patrick Gardella wrote: I'm stumped on a problem I've been having with a Comet UHV-4 quad band antenna (10m/6m/2m/70cm). It's mounted to a Comet CP-5M mobile mount on my Saturn SL1. The problem I have is that I cannot get it to tune. I figure that it's an insufficient RF ground. I've tried running braid from a good ground location in the trunk to the mount (good metal to metal contact on the "car" end of the braid). Still nothing. So I was wondering if there would be a way to tune the antenna off the car. I was thinking of creating a ground plane with several 1/4 wavelength wires on each of the bands, and then adjusting the antenna to bring it into tune. That way I would know if the ground braid I put into the car is working well enough. Does this make sense? Or is it a wasted effort, and I should spend my time on improving the ground in the car? What would you do? 73, Patrick N3EO |
#2
|
|||
|
|||
Thanks, Dave. The mount is on the trunk lip. I've got the
grounding strap running from the mount set screws to the frame of the car. So you basically ensured that the trunk lid had good contact with the rest of the car? 73, Patrick N3EO Dave Shrader wrote in message news:K1p8c.1594$w54.9895@attbi_s01... I used to run mobile in a SL-1 using Hamsticks and the Hustler mobile antennas. Where and how did you mount the antenna? I used a lip mount on the trunk hood [which is metal] and three different ground straps from the trunk hood to various points on the frame. Deacon Dave, W1MCE Patrick Gardella wrote: I'm stumped on a problem I've been having with a Comet UHV-4 quad band antenna (10m/6m/2m/70cm). It's mounted to a Comet CP-5M mobile mount on my Saturn SL1. The problem I have is that I cannot get it to tune. I figure that it's an insufficient RF ground. I've tried running braid from a good ground location in the trunk to the mount (good metal to metal contact on the "car" end of the braid). Still nothing. So I was wondering if there would be a way to tune the antenna off the car. I was thinking of creating a ground plane with several 1/4 wavelength wires on each of the bands, and then adjusting the antenna to bring it into tune. That way I would know if the ground braid I put into the car is working well enough. Does this make sense? Or is it a wasted effort, and I should spend my time on improving the ground in the car? What would you do? 73, Patrick N3EO |
#3
|
|||
|
|||
Patrick Gardella wrote:
Thanks, Dave. The mount is on the trunk lip. I've got the grounding strap running from the mount set screws to the frame of the car. I ran three different ground strap, 1.5 inches wide, from the trunk lip/lid to the car frame. First, I burnished the finish off the lip right under the antenna mount. I added a strap from that point to the nearest point of metal connected to the frame at the wheel well. Next I loosened the two trunks lip supports, hinges, and burnished the finish off under them. A strap was connected from one mount to the metal that houses the Saturn's speakers [rear deck]. The second strap was fastened to a burnished surface under the latch for the trunk mount. All burnished surface/strap locations were weather sealed with "Coax Seal" from HRO. Note: the radio, IC706 MKIIg, was bolted to the rear deck between the speakers and the remote head was installed at the drivers seat. The bolt locations were burnished to bare metal. So you basically ensured that the trunk lid had good contact with the rest of the car? 73, Patrick N3EO Dave Shrader wrote in message news:K1p8c.1594$w54.9895@attbi_s01... I used to run mobile in a SL-1 using Hamsticks and the Hustler mobile antennas. Where and how did you mount the antenna? I used a lip mount on the trunk hood [which is metal] and three different ground straps from the trunk hood to various points on the frame. Deacon Dave, W1MCE Patrick Gardella wrote: I'm stumped on a problem I've been having with a Comet UHV-4 quad band antenna (10m/6m/2m/70cm). It's mounted to a Comet CP-5M mobile mount on my Saturn SL1. The problem I have is that I cannot get it to tune. I figure that it's an insufficient RF ground. I've tried running braid from a good ground location in the trunk to the mount (good metal to metal contact on the "car" end of the braid). Still nothing. So I was wondering if there would be a way to tune the antenna off the car. I was thinking of creating a ground plane with several 1/4 wavelength wires on each of the bands, and then adjusting the antenna to bring it into tune. That way I would know if the ground braid I put into the car is working well enough. Does this make sense? Or is it a wasted effort, and I should spend my time on improving the ground in the car? What would you do? 73, Patrick N3EO |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|