- August 30, 2018 at 6:01 am #106134
Received an email yesterday from ISS. The long awaited ATU is not too far away. Going through testing now.
- October 20, 2018 at 1:01 pm #106953
If you have more news about this ATU, by when it will be available and where, please let me know.
- January 23, 2019 at 6:03 am #108953
Hi Peet, I am told by Bill Baker sooner than later. Most likely the end of January or early February.
- October 20, 2018 at 2:24 pm #106978
- October 21, 2018 at 3:41 pm #106987
I know its called the RAT 1.0 but not too sure of what (if any) improvements this antenna tuner will have compared with the old one.
- October 21, 2018 at 8:48 pm #106993
Thank you. I guess we have to wait and see what the end product looks like. I requested to put my name on the list.
- November 29, 2018 at 9:32 am #107560sparepartsParticipant
Total posts : 52
Just pre-ordered ours after receiving the alert from Bill Baker:
“You are on an exclusive list of people registered to be first in line to receive information on the new R.A.T. 1.0 Remote Antenna & Tuner, which will extend the outdoor range of the i A.M. Radio / Talking House Transmitter to a half-mile or more via standard RG6 Coaxial Cable. We anticipate releasing the product in the first quarter of 2019 and will be entering the production phase soon.
Please call me at 616-772-2300 (extension 102) before December 15th to activate this offer. Thanks.”
- November 29, 2018 at 2:25 pm #107568
Getting Ready to Join the Proud New Owners of the R.A.T.1.0
Thanks to spareparts for the good news that the Antenna Tuner is coming out.
What do we know about this technology as of now?
What I recall from a previous ATU is that the transmitter can be kept safely indoors while the Tuning Unit and Antenna can be outdoors at the other end of a shielded coaxial cable.
Mister spare, how do you intend to set yours up?
- November 29, 2018 at 2:27 pm #107570sparepartsParticipant
Total posts : 52
As close to what passes for an antenna as I can!
- November 29, 2018 at 3:14 pm #107572
If you can get your antenna up as high as possible you’ll get more range. Another Church Part 15 station from the Facebook Group Part 15 AM And FM Broadcasting put theirs inside a church steeple (No Ground Lead) more than 30 feet up and got 3 miles to a Tecsun PL-880 Radio.
So height equals might on AM as well. I’m sure the new R.A.T 1.0 will reach more than 1/2 mile unless your receiving it with an Emerson Radio or K-Mart blue light special.
- November 29, 2018 at 8:57 pm #107576
<p>Hi,</p><p>I’m living in a security complex, I wonder what the size of the antenna would be – I think it is a vertical construction? Height is another problem..</p><p>Regards </p><p> </p>
- November 29, 2018 at 11:20 pm #107578
I’m thinking its a 102 inch CB whip antenna mounted on top of the ATU.
Put it like this it can’t be above 10Ft this we do know. But you can place the ATU with the antenna up in a high place since you can connect RG6 coax cable to the unit.
Rather or not they give you coax is unknown but you can order about at least 25Ft of the stuff and I thik it only cost me $12 for quad shielded cable. If you order more than 25Ft your going to start to lose power before it gets to the antenna however you may get away with 50 Ft of it. Now your talking some good range.
- January 23, 2019 at 6:00 am #108950
To TheLegacy: At 1000 kHz quality RG-6 exhibits a loss of 0.2 dB @ 100 feet. Assuming a TPO of 35 mW, the 0.2 dB loss is equivalent to a 4.5% reduction of power. A 4.5% reduction of 35 mW results in 33.4 mW being delivered to the antenna/antenna coupler.
This reduction in power could only be measured with extremely accurate equipment and as such, one could not discern the difference between 35 mW and 33.4 mW on the receiving end.
- November 30, 2018 at 8:56 am #107584
What We Know So Far
Peet brought up a significant point: “I think it is a vertical construction.”
That’s what I expect also. From what I have heard AM antennas are almost always vertical so that they will send in all directions, but sometimes stations have used horizontal antennas for special reasons, but horizontal antennas are directional.
A recent edition of This Week in Radio Tech, the weekly radio program, talked about emergency antennas that were set up temporarily following Hurricane Michael in Florida which knocked down a lot of radio towers. One station used wooden poles to erect an “inverted L” antenna, which is part vertical and part horizontal.
Getting back to the R.A.T.1.0 Antenna Tuning Unit, is there any reason to use one indoors? I would think it is only advantageous if used outdoors.
- January 22, 2019 at 11:18 am #108936
Inside a Wooden building like a church steeple may not hurt as much
OK say the landlord of your place told you that you can’t put the antenna outside because of the HOA deal but offered you a solution and that was to put the antenna up in the attic? Yes it may cut the range a bit but surly will be better than that wire antenna inside your house. Plus if you got imaginative you may be able to hide the ATU in a tree. Only thing is that you may need to climb a ladder to tune it but after than it will be tuned and second could more prone to lightning. In this case you could have your coax looped a bit before entering the apartment or building.
I was lucky that my landlord allowed me to to put up the antenna but in Elizabeth city I sort of hid mine in a tree since it was in a highly visable area whereas people would see it as they were walking or driving by the house.
- January 22, 2019 at 12:53 pm #108939radio8zSenior Moderator
Total posts : 232
TheLegacy wrote : “…a solution and that was to put the antenna up in the attic? Yes it may cut the range a bit but surly will be better than that wire antenna inside your house. ”
Can you actually demonstrate that an antenna in the attic will provide more range than the “wire antenna inside your house.”
Maybe the “wire inside my house” doesn’t meet the unstated criteria but my test antenna mounted horizontally from the ceiling joists in my basement gives about half the range observed when using my 3m outdoor antenna with the same transmitter. This is observation, not opinion.
I contend you cannot make such a statement unless you have tried it.
- January 22, 2019 at 3:24 pm #108941
Work Needs to be Done
Radio8Z opens an important question that has not been explored very much through comparative experimentation.
There are two schools regarding AM medium wave antennas at the ground or up in the air.
There have been claims that MW antennas work best at ground level because they emanate a ground-wave that travels on the surface of the earth.
Others swear that altitude gives MW signals better range.
Yet no one that we’ve read about has tried both and given a comparison.
Some refer to the fact that most AM stations have their antenna towers mounted at the ground, but the thing is that they also reach over 100′ into the air, thus being both ground mounted and high at the same time.
I’d do experiments myself if it weren’t for being swamped with other projects.
As far as attics are concerned, all kinds of properties might contribute to its working better than lower down in the house or worse. You would have to try both and compare them, which is what Radio8z is saying.
Guessing is legal but not reliable.
- January 22, 2019 at 4:00 pm #108943Radio JoeParticipant
Total posts : 57
I have two long wire ten foot antennas in the attic for two different AM broadcast band transmitters. I have one long wire ten foot antenna mounted outside of the house. Al l antennas are horizontal antennas.
The outside antenna is made from 12 gauge stranded wire and is only about 8 feet off the ground, maybe 9 in one part. All transmitters for each antenna are in the basement.
My home is a one story small rambler, so the antennas in the attic are about 12 feet off the ground at most and they ride close to the peak in the roof. Each antenna has its own loading coil.
Each transmitter is a Talking house 5 and power out of each transmitter as tested comes to about 100Mw. On each transmitter so they all have the same power output.
I have to honestly say the attic antennas work almost better than the one I have mounted outside. No matter if its winter and the roof is covered with snow or summer.
The outside antenna is too close to the ground and has a lot of capacitance but the capacitance cancels out nicely with the loading coil. None of the antennas are actually impedance matched; I just run the signal to the loading coils with RG 59.
The coax is shield is grounded again in the attic and on the outside antenna it is the shield is also reground. So what I am saying both ends of the coax shield is securely grounded at each end.
I run the center lead of the coax into the loading coil and from that into the antenna. In the attic I use RG 8 for the antenna radiator, both center conductor and outside braid is used, I just tie them together.
The transmission doesn’t seem to be affected byte wood in the attic or things around it like boxes and that. However I have no way of seeing what effect it would have if those things were not there. It’s not rocket science to know the best antennas are high up and free from surrounding obstructions.
I see new discussions about the ATU. I have the original Talking House ATU. I tested it about two years ago; ok I was impressed, nice turnkey operation…However… I have made several simple inductance tuned loading coils that work just as good into a 10 foot vertical. But I do want to point out it’s a very nice turnkey operation with meter and all. I don’t know how long the plastic case would last in all kinds of weather, so I tested mine and then put it away and made my own loading coil for my other antennas.
If the ATU would be priced at about $60 (without 108” whip, ok I would say they get my money, otherwise there is noting magical about the ATU other than it’s a real convenience if you just want to put down a fence post and mount your antenna.
- January 22, 2019 at 5:02 pm #108947RichPowersParticipant
Total posts : 407
It seems I heard the price of their optional ATU is going to be in the $300 range.
- June 7, 2019 at 8:57 am #111096Paul DoboszParticipant
Total posts : 3
ISS has announced that they will have the new iAM antenna and tuner (now called Range Extender 2.5) on display at their booth at the Dayton Hamvention in Xenia, OH this coming weekend.
- June 7, 2019 at 11:57 am #111399
The Dayton Hamfest is long over with.
- June 7, 2019 at 1:14 pm #111403
Maybe he is talking about another smaller one somewhere else in Ohio? I knew Grand Ledge, Mi (West Of Lansing) had theirs either just before or just after Dayton.
- June 8, 2019 at 8:03 pm #111432Paul DoboszParticipant
Total posts : 3
My posting about the Dayton Hamvention was made several weeks ago (before the show) unfortunately it sat in limbo until a couple of days ago when it finally posted to the forum.
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