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Radio => Antennas => Topic started by: unseenone on September 04, 2013, 11:28:36 AM

Title: FT857D Antenna
Post by: unseenone on September 04, 2013, 11:28:36 AM
I currently have an ATAS120A which I like because one antenna will do it all. The down side is it's not very good at anything. The fellow I'm buying the 857 from suggested a Tarheel II. What recommendation does anyone have for an antenna or antennas configuration for the mobile rig?

Title: Re: FT857D Antenna
Post by: scubadivingjoe on September 04, 2013, 02:43:53 PM
I have read mixed reviews on them.  But for the most part they are a good antenna, just make sure you keep up with the seals on the antenna.
Title: Re: FT857D Antenna
Post by: Rockntoy on September 04, 2013, 02:45:17 PM
With my 857 I'm running a Chameleon Antenna. It is a V2L whip with a CHA Hybrid Base. I have it mounted on my 95 Jeep wrangler and it works very well for me around this area. I have a unknown brand mag mount 2 meter for the other side. With this combo I can regularly talk with florida and east coast, tennesee ,alabama, new york. West coast if conditions are good and arizona most times in the evening. My 2 meter seems to do very well for the local line of sight and well with a repaeter.

http://chameleonantenna.com/Chameleon%20HYBRID/Chameleon%20HYBRID.html (http://chameleonantenna.com/Chameleon%20HYBRID/Chameleon%20HYBRID.html)

Title: Re: FT857D Antenna
Post by: unseenone on September 04, 2013, 03:00:38 PM
I'm going to need a little more hand holding I think....  I did buy one of their antennas, but I was never able to get it working, even as well as the ATAS120a antenna for Base operation.   Details below, if it's something you would like to try. I even bought a tuner from them as well. I'm sure it's more an issue of not knowing what I'm doing vs issues with the antenna. As mentioned he's very responsive to e-mails, etc. I just could never get it to work worth a bean.

The CHA Zepp Antenna has been specially designed for apartments, condominiums, homeowners associations, deed restrictions and CCRs (Covenants, Conditions & Restrictions), ARES, RACES, MARS, EMCOMM, NVIS, First Responders, Emergency Preparedness and attic antenna installation. Its a true base station or portable stealth antenna.

The antenna is 75 long and covers 10M to 160M (with limited performance on 160M). The Zepp is composed of a 25' matching section and a 50' radiator.

A horizontal configuration of the Zepp antenna will be good for local communications (NVIS from 0 400 miles) on 40M (day evening) and 80M (night). A vertical installation (45 degree +) will provide a vertical polarization and will benefit long-range communications.
Title: Re: FT857D Antenna
Post by: Rockntoy on September 04, 2013, 03:47:08 PM
It is also a good system but you have to have the vertical height for myself to work in my area. I am in a valley with very little ways to get the antenna the height I need to make it really work. I have a similar setup now for the house and the neighbor is not happy with it cause i have it hanging off one of his trees. Mine does work but it does need more height. I'm trying to save up and get a diamond hf set up or something I can get up in the air a little better. Still learning what works here and what is not so good.
Title: Re: FT857D Antenna
Post by: unseenone on September 04, 2013, 03:51:09 PM
Can you post some pictures and more information about your mobile setup. I see the link on the page is a wire antenna... I also have a 4x4 so I want it to be durable. I can mount from the roof rack rail, and I have a license plate mounting system. The latter  being a better option, because any 4x4 activity can be pretty damaging to sensitive antennas..
Title: Re: FT857D Antenna
Post by: AD on September 04, 2013, 05:15:07 PM
Rock

We will have to schedule a comm some evening on 20 meters in tue evening.  After Sunday i am on Business travel until the end of the month.
Title: Re: FT857D Antenna
Post by: Rockntoy on September 04, 2013, 10:01:52 PM
sounds good.
Title: Re: FT857D Antenna
Post by: Rockntoy on September 04, 2013, 10:04:17 PM
Mine is a two peice whip with the Hybrid base. I'll get some picks up soon with it installed. I take it off when I'm not running around, to dang hot in a jeep right now to be out and about.
Title: Re: FT857D Antenna
Post by: Rockntoy on September 05, 2013, 10:38:53 PM
Here is my setup on my jeep.
Title: Re: FT857D Antenna
Post by: scubadivingjoe on September 05, 2013, 11:21:17 PM
Nice Jeep and nice antenna.  I want to put one on my ride but the wife said no
Title: Re: FT857D Antenna
Post by: Tempstar on September 06, 2013, 05:28:03 AM
I've said it before and I'll say it again, never let price be a determining factor with an antenna purchase. Lord knows I've pissed away enough cash learning this lesson.  A Chameleon generally performs 1 s unit less than my G5RV at 48'. That is with it on a tripod and no radials. Mounted on the Reese hitch of my Jeep Cherokee it does equally well. I gave away a Tarheel II because it wasn't resonant without me making a new whip, then only marginally. I used to own an 857d with an ATAS which I sold after a short time: Radio was OK, ATAS was junk. I had equally poor results with a Buddipole. Since doing the Chameleon with the V1L and MIL whip, I'm now surrounded with them as all the members of our local club are getting them too. I dropped $432 on my set up, and just bought another one two months ago for the go-kit. Radios all seem to be pretty equal for a given class, but the antenna is what makes them perform.
Title: Re: FT857D Antenna
Post by: AD on September 06, 2013, 09:53:18 AM
What was the cost of this set up?

Have you tried it for NVIS yet and if so how does it work?


Here is my setup on my jeep.
Title: Re: FT857D Antenna
Post by: unseenone on September 06, 2013, 12:36:27 PM
frig.... lost my post. I'll summarize

Thank You Rockintoy, Tempster, AD, everyone..  Perhaps you can send me bigger pictures, the picture is too small.

The current roof rack / roof rail configuration for an ATAS120A is not practical for off road, or even back roads, as it sticks up too high and will be damaged.

To that end I bought a stainless license plate antenna mount. This is not idea, but will give me some flexibility, though I'll still have to use a hinged mount in order to open the boot.

Here is a picture of the current configuration, and some other Ham install pictures. I have to run a ground strap to a body ground, because the roof is glass, and there is no ground to the roof rail.

As far as costs, I don't care about the cost so much, but I don't want to have to worry about tuning antennas and mucking about. I would even run two antenna's if needed.  I want decent performance, yet some durability. This will not be the case with the Tarheel or Yaesu Antennas. If I have all band radios, I want to be able to use them, as needed.

Antenna / Anderson installation
http://www.disco3.co.uk/gallery/thumbnails.php?album=26194 (http://www.disco3.co.uk/gallery/thumbnails.php?album=26194)

Antenna Install
http://www.disco3.co.uk/gallery/displayimage.php?album=26194&pos=1 (http://www.disco3.co.uk/gallery/displayimage.php?album=26194&pos=1)

This is the license plate mount I picked up, but have not yet installed. You could also flip it over, which probably would be my intention.
http://www.mfjenterprises.com/Product.php?productid=MFJ-2820 (http://www.mfjenterprises.com/Product.php?productid=MFJ-2820)

This is what I'm trying to mount it on;
http://nwoods.smugmug.com/photos/211888803-L.jpg (http://nwoods.smugmug.com/photos/211888803-L.jpg)

Admittedly I got into HAM because of AD and AA, and I am not as up to speed as many others. I'm trying.

With the addition of the FT857, I'll be able to set up the 897 in the office, and begin to practice more in earnest. I will of course need an antenna solution for the Base as well. I live in a neighborhood, so I will be limited as to what I can use. A buddipole type setup comes to mind, that I can stick in the back yard. The Chameleon I got absolutely did not work at all well compared to the ATAS, I am not sure why, it could be a combination of the slope I am on, and the thousands of houses all around.
Title: Re: FT857D Antenna
Post by: Tempstar on September 06, 2013, 09:46:24 PM
Ad,
My setup cost $432.00.

I was just working the 7000 tonight and decided to switch between the Chameleon at 10' and the G5RV at 40'. 1 S unit less on the Chameleon, and a little more noise. If the same conditions exist tomorrow, I'll try throwing down a few radials and see if it cuts the noise.

NVIS, I just tilt it over to about 30 degrees and run ground wave out to around 5 miles and NVIS as close in as 88 miles (confirmed contact)
Down side, it seems very prone to receiving electrical noise from any close power lines.
Title: Re: FT857D Antenna
Post by: AD on September 07, 2013, 09:43:54 AM
Thanks Temp.

What is the exact parts list and cost for your setup? Where did you get all of the parts?


 I have a Avalanche that I am looking at putting a HF and UHF/VHF antennas on for use with my 857D.  I am looking at getting the NVIS capabilities set up on this for when I am out of repeater coverage.

I am really close to buying on of these  http://www.powerwerx.com/two-way-radios/mobile-radios/ (http://www.powerwerx.com/two-way-radios/mobile-radios/)

Powerwerx DB-750X Dual Band VHF/UHF 750 Channel Commercial Mobile Radio
Dual band VHF/UHF, 750 channel commercial transceiver with 10 memory banks. Freq. range: 136-174, 400-490 MHz. 50W VHF, 40W UHF power output, Single Receive or True Dual Receive (V+V, U+U, V+U), Optional Remote Head Mounting Kit. Part 90 certified. More Description

For $300 and you get access to FRS/GMRS/ and other bands.   I know there restrictions on transmitting say GMRS unless you have the paper, but i am looking at putting these in my Commander UTVs that I use for work.
Title: Re: FT857D Antenna
Post by: unseenone on September 07, 2013, 02:42:38 PM
Nice Radio AD....   I know unlocking, freebanding is frowned up in some circles. It makes sense from a preparedness standpoint post SHTF. You would just need to be careful not to accidentally transmit...  What are your views on the subject. The reason this question pops up is due to a post on SB I saw the other day.. The guy is promoting the use of his hacks, and also they've developed a set of frequencies for "preppers" that doesn't make sense at the end of the day...  but as you've mentioned before a group who is coordinated together would. Perhaps a new topic is in order on the subject, but it seems like at this point, there a lot of AA group members who are within range of each other..  http://www.survivalistboards.com/showthread.php?t=312005 (http://www.survivalistboards.com/showthread.php?t=312005)

Back on the Antenna questions...  any conclusions? For the right combination of antennas for the All Band radio?
Title: Re: FT857D Antenna
Post by: AD on September 07, 2013, 06:00:23 PM
Is this for a base or mobile?  You wont get all bands out of one antenna.

Obviously UHF/VHF on one antenna for a base , my choice is a X50
http://www.eham.net/reviews/detail/1054 (http://www.eham.net/reviews/detail/1054)

For HF, do you have antenna restrictions in a HOA type of setting? Or can you put up a tower.
Title: Re: FT857D Antenna
Post by: unseenone on September 07, 2013, 09:13:22 PM
I'm looking to improve my mobile rig which is coming. Currently I've got an ATAS120a   I would run two antennas as needed. I'm asking for suggestions for each.


I am looking to put up some antennas at the house, and the HOA would have a bird if I put up a tower. It will have to be out of site, behind the house, on the roof, etc. We have a LOT of lighting when we get it, and it usually burns the place down it hits. The ground is essentially solid limestone, digging is not an option. They use jackhammers to put in fence posts around here. The soil we have is very dry. The area is kind of crappy. I'll send you a google map, you can look at the satellite and street views. I've also got pictures I took on the roof.

I spent 3 days messing around with the wire antenna I got from Chameleon, either I got a bad one, or my options are very limited. I ran it on the roof, various configurations, I tried the fence top, from a tree, etc. and couldn't get it to work.  i'm happy to Box it up and let you check it out..

So I'm gathering I will need 4 antennas, two for each rig.

Mobile Rig: FT857
Base Rig: FT897

Title: Re: FT857D Antenna
Post by: Tempstar on September 07, 2013, 10:20:07 PM
Ad,
 I have the Hybrid,V1L, and MIL whip. If mobile I use the Hybrid and V1L only. The Hybrid also comes with a longwire that allows use without the V1L or MIL and does great on NVIS duty right from the vehicle. Also, you can screw just the upper section of the V1L into the Hybrid and work 2m/70cm.
www.chameleonantenna.com (http://www.chameleonantenna.com)
Is it the best you can buy?No. For a portable multiband that gets a great bang for the buck, it can't be beat.

Unseenone,
I assume you're talking about the Emcomm II. With your soil conditions, a radial underneath is a must. My neighbor runs one and it hears the same as his Gap Titan II at the same 25' elevation, and only gets slightly worse signal reports. We live at the beach though with highly conductive soil and it helps a lot.

Also, every radio I own has been modded for extended transmit. I stay in the areas I'm licensed for, but I want the capability should I ever need it. The last 3 I bought I modded as soon as they came out of the box! (TM-V71A, IC-7000, TH-F6A)
Title: Re: FT857D Antenna
Post by: AD on September 07, 2013, 10:29:38 PM
Temp thanks. can you run NVIS on the run?

UN

Do you have trees in the yard?  If so I have a HOA and run. 20 and 40 meter Par End Fedz http://www.universal-radio.com/catalog/hamwire/4456.html (http://www.universal-radio.com/catalog/hamwire/4456.html) with fantastic results for an antenna hidden in a pine tree. I have this box  http://www.kf7p.com/KF7P/EntrancePanels.html (http://www.kf7p.com/KF7P/EntrancePanels.html)  on a block wall near the base pf the tree with lighting arrestors in it. 


These are great panels.  Drop in a 8ft ground rod and attach it via the flat copper strap from kf7p smeared with the copper conductive grease with sheet metal screws into the copper backing plate and your set. 
Title: Re: FT857D Antenna
Post by: unseenone on September 08, 2013, 10:27:23 AM
As previously mentioned, the only way you can drop in an 8' grounded rod would be with a jackhammer or a drill. The Rod itself is cheap...    The rod would then sit in a 8' hole in rock.
Title: Re: FT857D Antenna
Post by: AD on September 08, 2013, 02:01:59 PM
On the Chameleon, borrow a analyzer and test the antenna and feed line to see if it is a problem. 
Title: Re: FT857D Antenna
Post by: ClovisMan on September 09, 2013, 02:23:02 PM
Wow, how conveinent. I recently got upgraded to General and have my 857D Ham shack up and running. I have a dual band J-Pole , but no HF antenna. I see people recommended mobile whips and such, but how about a base antenna for this rig. I have no restrictions whatsoever, but I also live on solid limestone with the jack-hammer ground rod issue.
Title: Re: FT857D Antenna
Post by: AD on September 09, 2013, 02:45:00 PM
Hey Clovis

Do you have a budget in mind? Or bands tou plan on using?
Title: Re: FT857D Antenna
Post by: ClovisMan on September 09, 2013, 02:52:18 PM
Hey Clovis

Do you have a budget in mind? Or bands tou plan on using?
I figure I'll need something that can hit all or most of the bands. Mainly 10,17,20,40,80
I'm so new I really don't know. LOL
I got with my local Ham club. but all that want to do is ragchew on the club repeater.
As far as budget goes....the cheaper the better, LOL. I cannot afford an extravagant tower set-up at this point in my life.

Does this site host any HF nets specifically shtf related? You know...for practice sakes.
Title: Re: FT857D Antenna
Post by: AD on September 09, 2013, 04:15:17 PM
How much ground do you have?  You can do some pretty big band coverage with a long wire antenna (several hundred feet).

Or the is the G5RV. http://www.hamuniverse.com/g5rv.html (http://www.hamuniverse.com/g5rv.html)
You can buy or make your own.

You will need a tuner though. I use this one.  Not the best, but works well and is $150.

No nets to speak of but several of us will try to make contacts set up via PM.
Title: Re: FT857D Antenna
Post by: Tempstar on September 09, 2013, 09:33:04 PM
AD,
 I ran the Chameleon NVIS mobile once, with the base on the Reese hitch and the MIL tied over to the front bumper. Every time I keyed on 40 the gages would jump around.
 For grounding for RF, not for lightning, I use stainless 1/16" cable from Lowes, quarter wavelength long. For the Chameleon on the tripod I lay out one for 20,40, and 80 all connected to the base of the tripod. A friend uses the same stuff under his EMCOMM II the same length as the wire with good results. Sure kills a lot of the noise.
Title: Re: FT857D Antenna
Post by: AD on September 09, 2013, 09:35:28 PM
Thanks Temp
Title: Re: FT857D Antenna
Post by: unseenone on October 17, 2013, 07:53:15 PM
So I have now settled on, and purchased what appears to be one of the best antennas out there. Now the bits and pieces are trickling in.

I'll need help and explanations along the way.  What I ended up with is a HiQ Military Antenna, purchased from Charlie over at http://www.hi-q-militaryantennas.com/mh-mobile.html (http://www.hi-q-militaryantennas.com/mh-mobile.html)

Pictured in the center is the MOV antenna. I ordered several options for it so I have a lot of configuration options, the ruggedized whip, the Military spring base, the tripod, DC Controller/Turns Counter,  EB-8 Caphat, Fold over, and a few other odds and ends.

My intention first, is to rig it up on the tripod, and deploy it as a base at home. I ordered per a friend of AD's the best Coax I could get, Times Microwave LMR400 for the base installation, and LMR240 for the Mobile Installation.

On the Mobile Rig, I will have two mounting options, depending on conditions, hitch mount, or roof rack mount (the roof rack mount will need to be fabricated).

The first project will be to get it set up and debugged on the tripod. I don't have all the pieces yet, but I started assembling things, to see what it will look like.

I am curious about doing something a little slicker with regard to counterpoise, and I wonder if anyone has any thoughts on how to optimize / measure counterpoise. I was thinking I would like to make a fancier counter poise similar to the ATAS120, which is a metal ring, with several radials attached.  Evidently, nobody that I have seen has done much with a tripod setup.

Title: Re: FT857D Antenna
Post by: Tempstar on October 18, 2013, 05:18:32 AM
I had a Hi-Q and it was a great antenna and would do 2 meter through a diplexer at 1.6:1. The downside for me was the fact that it was heavily dependent on a good ground system and had moving parts that could potentially fail (just an anal personal preference thing). I also got into the whole ALE thing for a while and needed a no-tune setup. Also, grab 5 snap on ferrites for the coax and install them outside the vehicle. I do this even with the Chameleon and it makes a big difference on the amount of RF in the passenger compartment.
 Remember too, that RF ground and electrical ground are different animals: You'll want to run a flat ground strap from the radio to the vehicle and from the antenna mount to the vehicle. The point being to make the vehicle an effective RF ground to oppose the RF energy being radiated. I learned the hard way and probably cooked some brain cells along the way. Grab a cheap field strength meter and try it inside the vehicle while operating and play with your grounding.
 Great choice on the antenna though. I get so frustrated seeing folks cheap out on the most important part of the rig and the cry about the poor results.
 As far as a tripod setup, I have a Chameleon dedicated to that. I use 3 33' stainless 3/16" cables with 3/8" rings crimped on that go under the mounting bolt of the base where it screws to the tripod, and tent stakes (they look like big nails with a plastic rope tie) on the other end. I'll try and post some pics. It does not seem to affect my signal reports much but sure gets a lot of noise off the receive side, especially electrical noise.
 Hope this helps a bit, and good luck!
Title: Re: FT857D Antenna
Post by: unseenone on October 18, 2013, 09:54:47 AM
This does help considerably. I understand the need for grounding, but your explanation puts they why in perspective. Currently i'm running the 857D with a remote head. I have a ground strap from the radio to the body. I also have a ground strap from the ATAS120a on the roof rack to the Body Ground Point.

I ordered 5 snap on ferrite for the project, I may need more. I haven't gotten the cable yet.

How to you measure a good or a bad counterpoise is the question on my mind at this moment.

Thanks
Title: Re: FT857D Antenna
Post by: AD on October 18, 2013, 10:28:27 AM
With a counterposie ruler of course!

Probably signal strength
Title: Re: FT857D Antenna
Post by: unseenone on October 18, 2013, 01:30:03 PM
I did a little experimenting on the HiQ with a YT-100 Tuner. You can tune it, without using the moving gadgets this way. It actually tuned better / easier this way than the Chameleon wire for whatever it is worth. Charlie said to experiment, so I experimented.
Title: Re: FT857D Antenna
Post by: Tempstar on October 18, 2013, 07:48:22 PM
For counterpoise work, 1/4 wave usually works, but any is usually beneficial. If one was the experimenting sort, one could start there and add until the SWR bottomed out. Start slightly de-tuned and work the lengths until you see improvement.
Title: Re: FT857D Antenna
Post by: unseenone on October 19, 2013, 05:15:10 PM
Taking your advice into consideration, I re-did the ATAS120a antenna.  I had the ferrite just inside the cabin. I hope this looks good.



What wire to you recommend for counterpoise work, keeping in mind, slick and easy to work with. I was thinking of ordering SuperWire.  I would just order the raw wire, but this would give you the general idea. http://newsuperantenna.com/MR1-SuperWire-Basic-Counterpoise/ (http://newsuperantenna.com/MR1-SuperWire-Basic-Counterpoise/)

Title: Re: FT857D Antenna
Post by: AD on October 19, 2013, 06:32:15 PM
I thought you could not get the Rover into the garage?
Title: Re: FT857D Antenna
Post by: unseenone on October 19, 2013, 08:04:50 PM
We did some experimenting when we got back, and with everything bolted down tight, it clears by 1/4". I just have to be really careful to not bounce it on the 1 1/2" floor lip. So far, no hits, it just rubs the rubber door seal as you back in.

How did the show go today?
How does the wiring look?
Title: Re: FT857D Antenna
Post by: AD on October 20, 2013, 07:05:49 AM
Starts tomorrow-wed. Just hard fun driving vehicles through DC and getting looks from everyone.  People were stopping there cars, getting out and taking photos.
Title: Re: FT857D Antenna
Post by: Tempstar on October 20, 2013, 07:28:48 AM
Good looking job on the mount!
I sometimes assume too much, so I'll throw this out for those who may not know: RF only travels over the surface of a conductor, not through it as electrical current does, thus the importance of the flat strap Unseenone is using in his great installation.
 As for counterpoise wires, I have experimented with different lengths and diameters and have found lengths starting at as little as 1/10 wavelength to be effective. I have also tried wires electrically grounded, earth grounded, and at no ground potential, and found that the counterpoise performs well with the exception of electrically grounded, where it has the potential of picking up 60hz hum and transmission  line noise from motors and switch gear. Try to remember to treat electrical and RF grounds as two distinct systems
 I have also played around with different diameters of counterpoise wires and not found a great deal of difference in performance except when I tried 30 guage magnet wire, which was apparently almost invisible to RF.
 In short, almost anything conductive will work as a counterpoise as long as it is at RF ground potential. Don't overlook electric fence tape either. I have a dipole I made from it and it works great, rolls up small, and is broad-banded due to the multiple conductors and wide layout.
Title: Re: FT857D Antenna
Post by: unseenone on November 21, 2013, 09:47:52 PM
So I bought a HiQ Piranha antenna, as far as screwdriver type multiband antennas go, it's one of the best out there.

I've been playing around with it on a tripod at this point. I need to have a mount built to mount it on the roof rack for mobile operations.

The issues I'm having at this point, are related to getting it "dialed in" on some bands.  It's fine on others, on SSB on 6, 10 15, 12 & 10 meters, I will get HSWR.  I have a SWR meter, but i'm not very practiced in using it, or how to get the desired result.   I'm hoping to get some advice here.  This is what I've got so far.

160m 1.910 SWR 1.0:1  335 turns
75/80m 3.837 SWR 1.0:1 693 turns
40m 7.180 SWR 1.0:1 821 turns
20m 14.291 SWR 1.0:1 933 turns
10m 28.446 swr 2.4:1 656 turns
12m 24.961 swr 1.8:1 599 turns
15m 21.276 swr 1.7:1 514 turns
17m 18.110 swr 1.3:1 839 turns

Does anyone have any advice, I think this is a bit technical.
Title: Re: FT857D Antenna
Post by: W.Lynn on November 21, 2013, 10:41:25 PM
I'm afraid I'd only be able to help in the tools & time sort of way, and you dont really need me for that.   You have more kit than I do.
Title: Re: FT857D Antenna
Post by: Tempstar on November 22, 2013, 04:48:44 AM
Anytime you run a multi band antenna, you're going to have areas of sacrifice. Your SWR readings are all great except 10 meters. The radio will handle 2.0 or less easily, and an 857 will fold back the power starting at 3:1. I'd say you're OK except 10 meters. Just check it all again when you put it on the vehicle because that big hunk of steel is going to make things change. I had to but a 5" longer whip on the Tarheel I had just to get to the 2.0 range, but Hi-Q is better stuff.
Title: Re: FT857D Antenna
Post by: unseenone on November 22, 2013, 11:17:10 AM
What happens on the bands with higher swr is when you transmit on SSB, the peaks cause high swr, which means you end up with a chopped transmission. So I need to figure out how to get the SWR down, with matching gear, shunts, and brains. The latter being where I am running a little short.
Title: Re: FT857D Antenna
Post by: AD on November 24, 2013, 01:36:05 PM
10 is the really only  hi one you have.  Can you manually adjust the screwdriver with the meter attached to see how it effects your readings? 
Title: Re: FT857D Antenna
Post by: unseenone on November 26, 2013, 06:16:38 PM
I did some experimenting. I used an unum from my Chamelion 6/160 wire antenna, and can get the SWR and matching down correctly.  I will need a shunt coil...  AD check the log and weep...  ::)
Title: Re: FT857D Antenna
Post by: AD on November 26, 2013, 07:00:47 PM
On QRZ or eqsl?
Title: Re: FT857D Antenna
Post by: Tempstar on November 27, 2013, 05:32:51 AM
Unseenone,
 You may also try 5 snap on ferrites on the coax just below the antenna.
Title: Re: FT857D Antenna
Post by: unseenone on November 28, 2013, 02:53:42 PM
Good point, I put one on each end of the coax, radio side, just outside the house...  I'll snap a few more on and see what happens..   

Logs are on qrz