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Old 07-08-2012, 10:10 PM   #31
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AKJAYINTX,

Sounds good. Be sure to post pics of the final install so we can all oooooh and aaaaaah over it.

73

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Old 07-09-2012, 01:28 AM   #32
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Anybody tried to install a HAM with a dual battery system? I would assume you would just hook up to the auxillary battery just like you would the main?
Also, does anyone have dual antennas? Why would you use two antennas vs one?

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Old 07-09-2012, 10:55 AM   #33
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Humm....install a HAM.......

Yes, you're right. Just hook up your power leads to the battery of your choice, most likely the AUX battery.

As far as dual antennas go, you should only consider that in order to get on all the bands you have radios for. For instance, a 5/8 wave antenna for 2M and a separate 1/2 wave antenna for 440. But remember, whenever you have other metal objects within 1-2 wavelengths of your antenna, those objects will change your radiation pattern. For the life of me, I don't understand how all those law enforcement vehicles can communicate when they have 7 + antennas on the roof and trunk lid.

If you are thinking of using 2, 2M antennas to provide some gain and direction, it is a lot harder than you might think. The phasing lines must be VERY VERY close to being equal length. Being off by 1/4" or more on 2M can have your 2 signals out of phase enough to distort the radiation pattern. The spacing between the two antennas need to be exact. I don't know the exact numbers, but if the book says the spacing should be 1 wavelength, then that is what you need. If you only have space for .92 wavelengths or if you place the antennas 1.2 wavelengths apart, the phasing will be off and your radiation pattern could be really hosed up. Plus, do you really want to change the omni pattern of a single antenna to a front/back or side/side pattern? For most mobile operation, especially on 2M FM, an omni pattern is preferred.

HTHs.

Regards,
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Old 07-09-2012, 01:24 PM   #34
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Great explanation of some serious antenna theory.
de KG6JRO
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Old 07-09-2012, 01:36 PM   #35
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Also wanted to show the rig runner distribution panel I use in my set up. Makes it easy to power CB, GPS, 2 meter, and other toys from one source just don't exceed rated amperage.
I love the Rig Runner and the Anderson Power Poles in general; my concern has been that in an off-road vehicle the vibration would dislodge the connectors from the Rig Runner, as the latching is not very robust.

Have you had any issues with the connectors vibrating loose, or have you done anything to get a more positive lock?

Great ideas and installations, guys.
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Old 07-09-2012, 02:18 PM   #36
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Quote:
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Have you had any issues with the connectors vibrating loose, or have you done anything to get a more positive lock?

Great ideas and installations, guys.
Get some of these posi locks. Available here:
http://www.powerwerx.com/powerpole-a...mp-2-sets.html


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Pos-lock.
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Old 07-09-2012, 03:29 PM   #37
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Perfect - Thanks!
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Old 07-10-2012, 06:32 AM   #38
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Glad I stumbled across this thread. I need to get a radio installed in the new JKR but hadn't given it much thought at this point. Thanks for the tips!

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Old 07-11-2012, 05:40 AM   #39
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Ordered ARRL Ham manual from amazon
This place is crazy, but I need to keep up!
I tested and passed last night! Can anyone recommend good mobile and HT rigs?

Anyone want to help me set it up in my jeep?
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Old 07-11-2012, 10:14 AM   #40
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CONGRATS Marc. Now the REALLY hard part starts.....as you asked, what should you get?

My recommendations are:

If you want 2M / 440 / APRS: Kenwood TM-D710. (Not cheap)

If you want 2M only: Kenwood TM-281A or Yaesu FT-1900R or FT-2900R

HT: Absolutely the Yaesu VX-8DR Quad Band and possible APRS options (again, not cheap)

As with owning a Jeep and joining an off-roading club, I would suggest that you at least attend a couple of meetings of one of your local Ham clubs. Lots of knowledge there and you might find an Elmer you can work with.

Congratulations again and 73......
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Old 07-11-2012, 01:07 PM   #41
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CONGRATS Marc. Now the REALLY hard part starts.....as you asked, what should you get?

My recommendations are:

If you want 2M / 440 / APRS: Kenwood TM-D710. (Not cheap)

If you want 2M only: Kenwood TM-281A or Yaesu FT-1900R or FT-2900R

HT: Absolutely the Yaesu VX-8DR Quad Band and possible APRS options (again, not cheap)

As with owning a Jeep and joining an off-roading club, I would suggest that you at least attend a couple of meetings of one of your local Ham clubs. Lots of knowledge there and you might find an Elmer you can work with.

Congratulations again and 73......
Thanks Hal - I take it you're not an ICOM fan. I was thinking about that for D-STAR protocol. The Yaesu VX-8DR seems great - the get some knocks over ease of use and weak built-in Speaker

For HT I was looking at the Yaesu and the ICOM 92AD

For mobile the Yaesu FTM-350AR looks interesting

I'm now planning on getting the General Class license do thinking about HF too

It's all great in theory - in practice I still have to figure out how to install and use it

Do you also have a CB installed ?
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Old 07-11-2012, 06:53 PM   #42
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Just FYI I'm installing a Yaesu FT-8800R with a comet SBB2 antenna. Antenna arrived today, however of course I forgot to order the cable to connect it with so I'm waiting for that. In the mean time I'm operating with a magnet mount antenna on my hood. Lots of static but eh its temporary.
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Old 07-12-2012, 10:08 AM   #43
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We don't have any D-Star repeaters around this area of SoCal, so there's not much call to get those specific models from ICOM. Some locals may have D-Star capability, but none that I know.

Yes, I do like Kenwood and Yaesu mobiles better, but I did have an ICOM IC-2720H dual bander in my previous vehicle for about 8 years. And as far as HF goes, as their ad says, "YAESU Choice of the World's top DX'ers." The only way to go.....IMHO of course.

You won't go bad with most any choice of radio. They all work fine. I think the biggest issue is ergonomics, display in direct sunlight, and ease of use. The better the radio, the more features, the harder it is to use. Like everything else in life. Try to get a rig that has a "Nifty Guide" available for it. You can get the guides directly from Nifty Accessories Ham Radio Set-up Guides, Radio Pouches and Chest Harness Home Page or most every ham store. And, it wouldn't hurt to read the manual cover to cover at least once.

I don't have a CB installed. I've thought about it but everyone I go off-roading with are hams so we use those rigs.

You might be lucky and find your new callsign on the FCC's website tomorrow. If not by Friday then Monday for sure. That's providing your VEs sent the paperwork off the day after your test.

Be sure to post your new callsign here.....maybe even modify your signature.........

73
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Old 07-12-2012, 11:56 AM   #44
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I have an ICOM HT and a 2M v8000. Both good radios with tons of features, but as N6HAL said, very complicated to program. The instruction manuals are a nightmare. :-(
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Old 07-12-2012, 02:24 PM   #45
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marc, check your local repeater directories before you spring for D-Star. If there are not any it's not worth having.

Look for a local club and attend some meetings. Talk with the members and see if they will show you their mobile setups. (It will probably be more difficult to get them to stop talking about what the have!)

N6HAL has it right, the more features, the tougher to operate. I miss my old RS HTX-252. Then memories, single band, very few features and an absolute breeze to operate. My Yeasu 8100 is dual band, 200 memories, multiple scanning modes, cross band repeater enabled, extended receive, and I need to look at the manual if I don't use it regularly.

Just about all the new rigs are very good, if you can get a chance to try them, either at a store or friends, that would be your best guide.
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Old 07-12-2012, 06:01 PM   #46
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Update - I order some toys :-)
A Yaesu FTM-350AR for the Jeep , and a Yaesu VX-8GR HT.
Still thinking about and antenna mount (the subject of the thread)
I did get a 1/2 wave (40") Diamond antenna - not sure how this will behave
either in front or back
I kind of leaning toward a front mounted solution - like this firestik mount

no love yet from the FCC on my callsign - checking every 5 minutes doesn't seem to help :-)

I'm a little leery of drilling into my nice almost new Jeep. Need to think on it.
there are a number of rear tire carrier mounts -
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Old 07-16-2012, 10:18 AM   #47
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Did you get your call sign yet Marc? I'm learning to use the repeaters here in San Antonia and other places I travel...

Speaking of that, is there any ham operators in san antonio? Let me know if you're here KF5QMN here
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Old 07-16-2012, 10:19 AM   #48
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I'm going to try the cooltech gate mount bracket

I'll report back on results
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Old 07-16-2012, 12:03 PM   #49
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Did you get your call sign yet Marc? I'm learning to use the repeaters here in San Antonia and other places I travel...

Speaking of that, is there any ham operators in san antonio? Let me know if you're here KF5QMN here
No call sign yet - not a problem since radio hasn't arrived either.
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Old 07-19-2012, 12:08 PM   #50
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I've been baptized KC9WIB

Installing the diamond 770 antenna on my jeep as soon as the mounting bracket arrives

73
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Old 07-19-2012, 06:30 PM   #51
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i've been baptized kc9wib


73
congrats ! ! !

73
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Old 07-20-2012, 05:38 PM   #52
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ok - so I got the cooltech gate mount bracket - which is really for a CB radio with a PL-259 style connector - the Diamond NR770HB antenna which I bought , had an N style connector - so the cable and antenna base hardware for the N style , is too big to fit in the mounting hole for the Cooltech bracket :-(
also , incidental, but I'm apparently missing a mini-coax to N connector for connecting the feed from the back of the Radio (N connector) to the mini-coax.

No project is ever finished until 3 trips to the hardware store...
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Old 07-20-2012, 07:46 PM   #53
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Marc,

Are you sure the antenna has an N connector? According to the specs on the antenna, it should be an UHF/PL-259. Also, on your FTM-350, that should be an SO-239 connector, not an N connector. BTW, the PL-259 is usually on the coax and the SO-239 is usually on the hardware, your radio or antenna. The PL-259 screws on to the SO-239.

You mention mini-coax. What is the nomenclature of the coax you're using? Something like RG-58, RG-174, etc. You DO NOT want to use "mini-coax" on 2M/440. Using just 20' of RG-174 (mini-coax), you will have 2.1 dB signal loss. That is almost half your power, send and receive. Using the standard RG-58/U that comes with most 2M/440 antennas has a loss of about .5 dB per 20'. Significant difference.

As far as connecting your coax to your antenna, I'm assuming that you need an SO-239 connector for your antenna, you can get something like a Diamond C101. I would suggest you contact your local dealer and tell them what you got and what you need. They should be able to figure out what you need.

The cooltech mount is designed for a 3/8"-24 antenna mount. That is the type of mount used on most CB antennas (include the 108" whip) and many HF ham antennas. Most, if not all, Ham 2M/440 mobile antennas use either an SO-239 or NMO (old Motorola style) mount. In order to adapt the cooltech mount to work with a SO-239 or NMO style mount, you should just be able to enlarge the hole. I had to do that with my license plate mount. I got hold of a step-drill bit (several) and enlarged the hole. Just be careful when drilling through stainless. You need to drill SLOWLY and keep everything cool. Take your time. Ask me how many bits I went through before someone told me to go with a sloooooow RPM rate and heavy pressure.

Good luck.

73
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Old 07-21-2012, 06:54 AM   #54
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Hal you are right in that the antenna and radio use PL-259 /SO-239 connectors

But the mount I bought is for a CB radio and the connector and mounting hole on it are not compatible, they are smaller

Re the coax, point taken, although the run from the antenna to radio is short, I will try a lower loss cable
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Old 07-21-2012, 08:02 AM   #55
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Hal - the mini-coax I have is RG-316 (from the Diamond C101 kit) which has similar loss characteristics to RG-174. I have a 6ft cable - it shows at 87% efficient vs 92% for RG-58 and 86% for RG-174.

Also discovered that I do have the connector/adapter for the mini-coax plug to attach the cable to the radio.

so while I could upgrade the cable - my main issue is the antenna mounting bracket.
I don't have a drill press - I could use a hand drill to widen the mount hole - but the bracket is pretty substantial...
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Old 07-21-2012, 09:28 AM   #56
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@Marc - "so while I could upgrade the cable - my main issue is the antenna mounting bracket.
I don't have a drill press - I could use a hand drill to widen the mount hole - but the bracket is pretty substantial..."
Try a step drill. They aren't cheap, but once you have one in your tool box you'll use it a lot.
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Old 07-21-2012, 11:44 AM   #57
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Hi Marc,

Yeah, I looked at the specs on the mount. 1/4" thick stainless is not real easy to work with. However, you should be able to drill out the hole to make it the size you need. As mentioned, a "step bit," something like #3 Unibit 9 Hole Sizes (1/4-3/4) 1/16 in. Increments Drill Bit-10233 at The Home Depot should work. They cost anywhere from $30 on UP UP UP.

You might also try taking the mount to a machine shop or auto repair/body shop facility. They might drill out the hole for you for a few $$$.
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Old 07-22-2012, 04:52 PM   #58
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Ok - so I looked at step drill bits, minor issue the steps are 1/8 deep and in steps of 1/16 and the hole I need is in a piece of 1/4 inch thick stainless. I could drill from both sides I suppose although access is difficult from the underside. I decided, why choose a simple elegant solution if you can come up with a more challenging and complicated one :-)

I tool the cooltech bracket with the 1/2 inch hole, and stuck a 3 inch bolt in it as kind of a mast. Onto that bolt , I attached another bracket that I had , a diamond mount that is meant to attach to a roof rail or mirror arm. In the end , it is a kludge, but seems to work. Now I plan to get another cooltech bracket and have it drilled out at my leisure.

Notes on other aspects of the install. I had to take off the spare tire - that sucker is heavy! I put the tire bolts on the rear bumper, was working and decided I needed another nut and bolt from the local hardware store, drive there, bought the bolts. Went back to the parking lot and saw the tire bolts still resting on the bumper! How's that for a stable ride?

The cooltech torx bolts to attach the bracket to the tire carrier are too long , useless essentially, I was able to use the origrnal bolts, they are long enough to hold the bracket and secure it to the gate.

Next up - running the power dippy for the radio. That must be easier!

Attached are a few pictures of the operation
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Old 07-22-2012, 05:10 PM   #59
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GOOD JOB !!!!!!!!!!!!!!! There's always a way to make things work.

Now, for running the power lines......."sure," that's easier

Keep that sense of humor.....you'll need it.

73
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Old 07-23-2012, 12:22 AM   #60
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So I know this is a HAM radio antenna and mount thread so I'm going to ask yall a question that I'm trying to figure out. I will be mounting 4 different radios in my Rubicon for various reasons and I'm trying to figure out how / where / etc.. to put / install the antennas for all of the radios so that they do not interfere with each other. I will be installing a Motorola XPR 4550 and antenna, a Kenwood TM-D710A HAM and antenna, a Uniden BCD996XT Scanner and antenna, and either a Cobra 75WXST and antenna or a Cobra 28LXBT and antenna. Help please??

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