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-   -   Ham radio installed (http://www.wranglerforum.com/f40/ham-radio-installed-148890.html)

ThingsAbove 03-25-2012 05:14 PM

Ham radio installed
 
I just finished installing my Yaesu quad band mobile unit in my new JKU. This was definitely the easiest mobile instlation I've performed. Kudos to Jeep enginners for making the firewall passthru so accessible. The interior panels are also easy to remove and replace and ther is lots of space inside for the various components.
My last vehicle (Dodge Challenger) didn't have any room for a clean install so I've been running without a mobile rig for a while and its nice to be able to be on the air mobile again.
I used one of my Diamond mounts on the drivers side hood and the hood was already ground strapped which was nice.

73s

ThingsAbove 03-25-2012 07:19 PM

Pictures
 
Comet antenna on Diamond Mount
http://cdn.wranglerforum.com/attachm...enna_thumb.jpg
Head Unit
http://cdn.wranglerforum.com/attachm...unit_thumb.jpg
Speaker on driver B pillar
http://cdn.wranglerforum.com/attachm...aker_thumb.jpg
Easy Firewall access
http://cdn.wranglerforum.com/attachm...cess_thumb.jpg

leadZERO 03-25-2012 07:21 PM

How did you mount the faceplate there? Or does that radio have a separate faceplate/radio?

ThingsAbove 03-25-2012 07:40 PM

Quote:

Originally Posted by leadZERO (Post 2181166)
How did you mount the faceplate there? Or does that radio have a separate faceplate/radio?

It has a detachable faceplate with a remote mount bracket. The head attaches to the transceiver using an rj45 cable.

I use automotive 3M double sided adhesive tape to attach the mount bracket to the underside of the lip of the dash. I've used the 3M tape for a number of installs over the years and it has always held well and comes off without damaging the dash in most cases.

leadZERO 03-25-2012 07:51 PM

Quote:

Originally Posted by ThingsAbove (Post 2181260)
It has a detachable faceplate with a remote mount bracket. The head attaches to the transceiver using an rj45 cable.

I use automotive 3M double sided adhesive tape to attach the mount bracket to the underside of the lip of the dash. I've used the 3M tape for a number of installs over the years and it has always held well and comes off without damaging the dash in most cases.

Would you mind taking a picture of the under-the-dash install? I've been torn trying to decide where to put the transceiver... I'm pretty sure I'd like to put the faceplate up above the rear view mirror (keep it a little away from hungry eyes). I thought about just mounting the transceiver under the passenger seat. But I'd hate to short it out if I ever end up in water. (That said, if I get my 1-year old carpet under water this soon, I'm gonna be crying anyway.) I was wondering if there was somewhere behind the dash that I could mount it. Haven't really taken the time to look around back there yet.

(I already have a Cobra 75 mounted behind the glove box...)

Ryan

ThingsAbove 03-25-2012 10:11 PM

Quote:

Originally Posted by leadZERO (Post 2181318)
Would you mind taking a picture of the under-the-dash install? I've been torn trying to decide where to put the transceiver... I'm pretty sure I'd like to put the faceplate up above the rear view mirror (keep it a little away from hungry eyes). I thought about just mounting the transceiver under the passenger seat. But I'd hate to short it out if I ever end up in water. (That said, if I get my 1-year old carpet under water this soon, I'm gonna be crying anyway.) I was wondering if there was somewhere behind the dash that I could mount it. Haven't really taken the time to look around back there yet.

(I already have a Cobra 75 mounted behind the glove box...)

Ryan

Here is a closeup of the under dash install of the head unit.

http://cdn.wranglerforum.com/attachm...tall_thumb.jpg

I tried mounting it above the mirror but the contrast on the display works better when viewed from above and I didn't like the mic cord hanging down in my view so I mounted it under the dash. It was also hard to reach above the mirror as there are a lot of small controls on the face of that unit.

The main unit is mounted securely to the bottom of the seat. It is actually a couple of inches above the carpet (difficult to tell from picture) but that should keep it out of a casual bit of water getting in the vehicle. It also keeps it from tumbling around under there.

http://cdn.wranglerforum.com/attachm...tall_thumb.jpg

Let me know if you have any more questions.

md gp 03-28-2012 11:24 PM

Hood mount
 
Quote:

Originally Posted by ThingsAbove (Post 2180716)
I just finished installing my Yaesu quad band mobile unit in my new JKU. This was definitely the easiest mobile instlation I've performed. Kudos to Jeep enginners for making the firewall passthru so accessible. The interior panels are also easy to remove and replace and ther is lots of space inside for the various components.
My last vehicle (Dodge Challenger) didn't have any room for a clean install so I've been running without a mobile rig for a while and its nice to be able to be on the air mobile again.
I used one of my Diamond mounts on the drivers side hood and the hood was already ground strapped which was nice.

73s

Howdy,
I have a new JKU and am trying to decide on the best antenna mount. Which Diamond mount did you use? Do you think the hood metal will hold up over time?
I have a fender mount in the same general location on my 98 TJ. It tore the fender metal with a 4 foot spring mounted antenna. I got the tear welded, added a brace and went to a three foot antenna. Now it's very stable. My TJ just has a CB for short range use.
I'm a Ham, looking to add a Yaesu FT7900R or FT857D in the JKU. I've read quite a bit about the various tailgate and other rear mounts, but I'm looking for the best possible antenna mount. Thanks in advance for any additional advice.
73,
Dave

ThingsAbove 03-29-2012 08:26 AM

Quote:

Originally Posted by md gp (Post 2194813)
Howdy,
I have a new JKU and am trying to decide on the best antenna mount. Which Diamond mount did you use? Do you think the hood metal will hold up over time?
I have a fender mount in the same general location on my 98 TJ. It tore the fender metal with a 4 foot spring mounted antenna. I got the tear welded, added a brace and went to a three foot antenna. Now it's very stable. My TJ just has a CB for short range use.
I'm a Ham, looking to add a Yaesu FT7900R or FT857D in the JKU. I've read quite a bit about the various tailgate and other rear mounts, but I'm looking for the best possible antenna mount. Thanks in advance for any additional advice.
73,
Dave

The one pictured on the hood is a Diamond K515. I wouldn't put an HF screwdriver antenna on the K515. I have used a K400 with both a Yaesu screwdriver HF/2M and a baby Tarheel on the hood of an F250 for years. The Tarheel is a great antenna by the way but the Yaesu AT screwdriver works seamlessly with the FT857 (which I've owned in the past). The Yaesu is easier to use until it gets wet inside.

Using a lip mount on the Jeep hood in that location should be relatively safe because the metal is curved giving it more strength than a flat section. I park in a garage so I can't have a very tall antenna on normally. I keep a dual band on normally and if I go on a trip I put the tri-band antenna SBB15 on which is about 5 feet long. I've used that antenna on the K515 mount on a door in the past without issues.

I tried my K400 mount on the rear gate lip mounted between the hinges. I ground strapped the door and the mount appeared solid and didn't interfere with the rear window opening when the gate was fully open. This put the radiating portion of the antenna above the metal of the Jeep body but then I noticed that it was within 6 inches of the defroster lines in the rear window. If you are running 50watts or more I would be concerned that (apart from high SWR) that the defroster wiring might act as a receiving antenna and potentially feed RF back into the electrical system of the Jeep. I have fried other electrical systems running only 100w in 6m so be careful.

As I'm considering where to mount my HF antenna I will probably use one of the Tarheel antenna mounts and move the antenna to the drivers side rear corner to get it away from the body of the vehicle and down nearer the road to reduce overall height and improve radiation. Mounts If you haven't previously done HF mobile before be prepared to spend many hours tracking down RF noise and then ground strapping and adding RF beads to all sorts of things in your Jeep. Getting rid of noise in a mobile HF rig is half the fun of Ham radio :)

I used to do CW while traveling but my Morse skills have degraded to the point where I only do voice or psk on HF now.

73s

Sccafire 03-29-2012 04:44 PM

Quote:

Originally Posted by leadZERO (Post 2181318)
Would you mind taking a picture of the under-the-dash install? I've been torn trying to decide where to put the transceiver... I'm pretty sure I'd like to put the faceplate up above the rear view mirror (keep it a little away from hungry eyes). I thought about just mounting the transceiver under the passenger seat. But I'd hate to short it out if I ever end up in water. (That said, if I get my 1-year old carpet under water this soon, I'm gonna be crying anyway.) I was wondering if there was somewhere behind the dash that I could mount it. Haven't really taken the time to look around back there yet.

(I already have a Cobra 75 mounted behind the glove box...)

Ryan

Here is my install. Faceplate above rearview mirror and transerver mounted in back of Jeep.

Yeasu FT-8800R Install - JeepForum.com

OP: Sorry for going off topic or to take away from your thread. leadzero PM me if you have any questions.

md gp 03-29-2012 11:51 PM

Quote:

Originally Posted by ThingsAbove (Post 2195733)
The one pictured on the hood is a Diamond K515. I wouldn't put an HF screwdriver antenna on the K515. I have used a K400 with both a Yaesu screwdriver HF/2M and a baby Tarheel on the hood of an F250 for years. The Tarheel is a great antenna by the way but the Yaesu AT screwdriver works seamlessly with the FT857 (which I've owned in the past). The Yaesu is easier to use until it gets wet inside.

Using a lip mount on the Jeep hood in that location should be relatively safe because the metal is curved giving it more strength than a flat section. I park in a garage so I can't have a very tall antenna on normally. I keep a dual band on normally and if I go on a trip I put the tri-band antenna SBB15 on which is about 5 feet long. I've used that antenna on the K515 mount on a door in the past without issues.

I tried my K400 mount on the rear gate lip mounted between the hinges. I ground strapped the door and the mount appeared solid and didn't interfere with the rear window opening when the gate was fully open. This put the radiating portion of the antenna above the metal of the Jeep body but then I noticed that it was within 6 inches of the defroster lines in the rear window. If you are running 50watts or more I would be concerned that (apart from high SWR) that the defroster wiring might act as a receiving antenna and potentially feed RF back into the electrical system of the Jeep. I have fried other electrical systems running only 100w in 6m so be careful.

As I'm considering where to mount my HF antenna I will probably use one of the Tarheel antenna mounts and move the antenna to the drivers side rear corner to get it away from the body of the vehicle and down nearer the road to reduce overall height and improve radiation. Mounts If you haven't previously done HF mobile before be prepared to spend many hours tracking down RF noise and then ground strapping and adding RF beads to all sorts of things in your Jeep. Getting rid of noise in a mobile HF rig is half the fun of Ham radio :)

I used to do CW while traveling but my Morse skills have degraded to the point where I only do voice or psk on HF now.

73s

Thanks for responding. The Diamond K515 is marketed as a SUV rack mount; did you have to modify it for use on the hood. I'm thinking the K400 may be a better choice for me. I still haven't decided whether to stick to 2 meter/440 or go to HF also. I'm thinking I may just start with the FM and then add a second antenna for HF later. Thanks again.

DeeJayy 03-30-2012 08:00 PM

Quote:

Originally Posted by md gp (Post 2198969)
Thanks for responding. The Diamond K515 is marketed as a SUV rack mount; did you have to modify it for use on the hood. I'm thinking the K400 may be a better choice for me. I still haven't decided whether to stick to 2 meter/440 or go to HF also. I'm thinking I may just start with the FM and then add a second antenna for HF later. Thanks again.

I'm in the process of determing the same thing, granted I still need my General license but from what I've heard 2 meters and 440 is the way to go with Jeeps but we all know more is always better :dance:

Jeeplover1 03-30-2012 08:02 PM

mmmmm HAM

JokerAndThief 04-04-2012 11:29 PM

Mounting the antenna towards the front also improves the ground plane loading of the antenna, making it a much more efficient radiator.

Wouldn't a screwdriver get beat to death on the trail? Have always wondered if an active antenna system would work better. Then again, I also run HF though a 103" whip (through a BIG tuner), so what the hell do I know <grin>

KG4CXY

ThingsAbove 04-05-2012 05:36 AM

Quote:

Originally Posted by md gp (Post 2198969)
Thanks for responding. The Diamond K515 is marketed as a SUV rack mount; did you have to modify it for use on the hood. I'm thinking the K400 may be a better choice for me. I still haven't decided whether to stick to 2 meter/440 or go to HF also. I'm thinking I may just start with the FM and then add a second antenna for HF later. Thanks again.

You're correct. That lip mount I used on the hood is a K412s not a K515. As far as using a K400, that mount has a tab that sticks out opposite the lip side to stabilize it. It would be OK when mounted on a flat hood or on the rear gate but I'd be concerned that mounting it vertically on that bottom edge hood that it might flex around and contact the body when closing the hood. The K400 is a large mount so keep that in mind as well.

All the best with your install.

ThingsAbove 04-05-2012 05:53 AM

Quote:

Originally Posted by JokerAndThief (Post 2221636)
Mounting the antenna towards the front also improves the ground plane loading of the antenna, making it a much more efficient radiator.

Wouldn't a screwdriver get beat to death on the trail? Have always wondered if an active antenna system would work better. Then again, I also run HF though a 103" whip (through a BIG tuner), so what the hell do I know <grin>

KG4CXY

I would disconnect a screwdriver HF antenna before heading into anything too rough.

A tuned whip is a great idea but I didn't know an auto-tuner would work on a long wire less than about 20 feet. Or are you using a manual antenna matcher? With a manual impedance matcher you could "tune" a roof rack :)

I'd be curious to hear about your setup.

PS. I don't know if you recall but you and I have worked a couple of volunteer Ham events together.

N4PBQ

73s

leadZERO 04-05-2012 07:23 AM

Another question I thought of yesterday... For those of your putting the box under the seat, what did you do for power? Run through the holes in the upper corner?

ThingsAbove 04-05-2012 09:01 AM

Quote:

Originally Posted by leadZERO
Another question I thought of yesterday... For those of your putting the box under the seat, what did you do for power? Run through the holes in the upper corner?

Positive direct to battery. Fuse right at battery then again before radio. I run the ground to a chassis ground rather than battery. There is much debate about how to treat the ground and I won't go into it here but all agree that you should not run positive through any part of your vehicles electrical system. Use a #6 stranded or larger.

md gp 04-05-2012 09:54 PM

Quote:

Originally Posted by ThingsAbove (Post 2222107)
You're correct. That lip mount I used on the hood is a K412s not a K515. As far as using a K400, that mount has a tab that sticks out opposite the lip side to stabilize it. It would be OK when mounted on a flat hood or on the rear gate but I'd be concerned that mounting it vertically on that bottom edge hood that it might flex around and contact the body when closing the hood. The K400 is a large mount so keep that in mind as well.

All the best with your install.

Thanks again.


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