Kiwa MW Air-Core Loop Antenna {In-the-News} FS / FA
RHF
Once again here is another one of the Legendary
Kiwa Air Core MW Loop Antenna's on eBay
eBay Auction Item # 5843381426
http://cgi.ebay.com/Shortwave-loop-Antenna_W0QQitemZ5843381426
The Opening Bidding is $200 with a Buy-It-Now Price of $795
Note - Shipping and Handling - TBD ?
This eBay Auction Ends : 23 DEC 2005 @ 10:19:20 PST
Question - Will this Kiwa Air Core MW Loop Antenna
beat the $760 Highest Price on eBay ? ? ?
NOTICE :
This is NOT my Auction and I am NOT Associated with the eBay Seller.
PLEASE NOTE :
That this Message is being Posted for Informational Purposes Only.
know your seller and something about what they are selling.
as always - buyer beware - life is a gamble and so is ebay ~ RHF
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RHF
sdan...@nyc.rr.com
if they'd ever bring the Kiwa loop back, assuming that they could get
all the materials (e.g., PVC pipe) required. He said no way. The Kiwa
loop will never be made again. I don't know why Craig would feel this
way unless the loop just wasn't a money maker.
Steve
wavetrapper
huge. That may have been a very labor intenstive product to build.
Hard to get materials is one factor. Also, the crowd of MW DX'ers gets
smaller and smaller with each passing year. Not to mention the
forthcoming destruction of the MW DX hobby courtesy of IBOC/digital
radio (thanks to the built in adjecent channel hash interference).
The cumulative effect of all of that may have made it more trouble than
it was worth and there isn't much in the way of "future growth."
mi...@sushi.com
DX. However, I understand your concern. IBOC will probably fail.
wavetrapper
at sunrise and have it run til sunset, I believe. Sunrise and sunset
are the two prime DX times on MW.
The broadcasters want it at night I think - which mean the FCC will
allow it eventually. They have to pretend to go through an
evaluation/consideration period first.
I can't see it succeeding on MW. Perhaps FM. I hope it does die a
quick death on MW.
dxAce
wavetrapper wrote:
Just like DRM.
DRM = QRM
dxAce
Michigan
USA
Guy Atkins
since the late 1980s, and I'm very familiar with his approach to Kiwa
products. Like with the Kiwa MAP unit, the MW Loop was labor-intensive to
build (but not quite as bad a situation as with the MAP). The major products
at Kiwa have been a labor of love for a dwindling hobby crowd. He kept the
parts costs as low as possible by doing most of the work himself (you should
have seen the ingenious, screw-driven device he cobbled together to cut the
spiral grooves for the wire in the PVC pipe core of the MW Loop!). Craig
also built his own flow-solder table for soldering PCBs, if I recall, and a
number of other clever tools and construction aids.
Craig is more of an inventor/engineer than he is a business person who has
all the expenses and profits figured out to the last penny. He had a very
good career before Kiwa as a broadcast station engineer, and gained quite a
reputation for modifying expensive pro-recording consoles to produce better
sound. He still does some consulting on the side, but his heart is in the
Kiwa Electronics business.
Unfortunately, as the hobby slowly decline, we lose some of the quality
accessories and peripherals like the Kiwa MAP and the Kiwa MW Loop. I'm
aware of an amazing prototype replacement for the MW loop that Craig was
working on a few years back, but now I don't think he'll be producing it.
Guy Atkins
Puyallup, WA USA
"wavetrapper" <k3...@arrl.net> wrote in message
news:1134846967.9...@g49g2000cwa.googlegroups.com...
cuh...@webtv.net
movie) is fixin to meet his maker,,,,,,, POW!!!!!
cuhulin
RHF
This eBay Auction for a Kiwa Air Core MW Loop Antenna
http://cgi.ebay.com/Shortwave-loop-Antenna_W0QQitemZ5843381426
Ended with a total of just Five (5) Bids; when some used
the Buy-It-Now Option for a Price of $795 + S&H
A SHOUT-OUT TO : CRIAG S. [ MR. KIWA ELECTRONICS ]
How about making a few more of these Kiwa Air Core MW Loop Antennas.
* Sell them at an eBay Opening Bid of $750 ?
* Seems to be a Market out there and the $750 Price seems to be close
to the current Open-Market Price.
* At a $750 Price there should be enough Profit to make it Worth your
Time and Effort to build them one-by-one or in small lots of 4 or 5.
that's all folks ~ RHF
Byung Myung Sying
actually still being made) connected to my Yamaha RX-V4600 Home
Theatre receiver which happens to be able to tune AM IBOC. It
actually has a pretty good AM section. There are 3 local Detroit AM
stations transmitting IBOC during the daylight hours. Two of them
actually sound pretty good, the other one doesn't quite have their
IBOC encoding working all that well and has lots of digital artifacts.
The big problem, which kind of defeats the whole purpose is that, even
with the help of the Kiwa Loop, AM IBOC cannot be received in "IBOC
Mode" except for extremely strong local stations. Thus, even if I
want to listen to "clear channel" digital stations at sunset or
sunrise from other cities, the IBOC mode doesn't have enough digital
signal to "latch on" to the digital broadcast. Thus, all the DX IBOC
listener gets is a noisier, inferior AM DX signal, much worse sounding
than it would have been without IBOC. I've tried tuning WBZ in Boston
(an IBOC station) at sunrise, since they turn on their IBOC earlier
than in Detroit (we're on the western edge of the Eastern Time Zone).
They have an excellent analogue signal, but there's no hint of any
detection of their IBOC signal.
I also have DRM capabilities (a TenTec RX-350 receiver and computer
sound card based software). As DXAce reports, the QRN from DRM
transmissions to adjacent stations is JUST AS BAD OR WORSE than IBOC.
However, since DRM doesn't share "bandwidth" with an analogue signal
(as IBOC does), the sound quality of the received broadcasts are
vastly superior -- truly FM table radio comparable. In addition, DRM
is receivable over DX skywave conditions. I enjoy broadcasts from
Radio Luxembourg in the early morning hours in true high fidelity
stereo sound. DRM also allows vastly superior coverage with lower
transmitter power. Listening to the late-afternoon DRM transmission
of Radio Nederland from Bonaire with 5 kW, I get no dropouts and
excellent audio quality.
I doubt that shortwave broadcasting has much of a future, even with
DRM. Antenna real-estate is just too expensive and environmental laws
are stricter. However, those who complain about the QRN from DRM
broadcasts should consider that all forms of digital transmission
(RTTY, the Russian Woodpecker etc etc) produce horrible levels of
interference, and DRM is really no worse.
Fred E.
N8UC -- Detroit
dxAce
Byung Myung Sying wrote:
Well it certainly would be nice if the QRM (DRM) would migrate to a nice little
band of their own instead of QRMing everything else with their excessive
bandwidth.
DRM = QRM
Die DRM, die.
Oh, by the way, I recall folks saying that SWBC was dying 40 years ago.
Guess what? It ain't happened yet.
dxAce
Michigan
USA
cuh...@webtv.net
problem at all (WJR?) for me to pick up Detroit at night time.
cuhulin
MRe
"Guy Atkins" <dxno...@guyatkins.com> schreef in bericht
news:scudnbEQlfSbXjne...@comcast.com...
It should be nice when he stops production of these succesfull items, to put
the schematics/drawings on Internet, open to the interested hobby-builder.
MRe
cuh...@webtv.net
gals,lets help her.Get on the stick.
cuhulin
Ron Hardin
receptionwise with a couple DA100E active whips combined in an ANC-4
(total new, about $600) ; or substitute a Wellbrook ALA1530 for one of the
whips and you can co-locate the whip and the loop, still combining them
in the ANC-4. The British pound though makes that more expensive today.
Just in case somebody is pining for great MW reception and cursing the luck
that you can't get the Kiwa MW loop any longer.
Separate the whips by 125' or so.
The ANC-4 lets you steer the pair of antennas from one endfire to the other,
with a null that starts in a closed V at endfire (= in the plane of the loop,
in the case of the loop+whip ; and = the line of the whips, in the case of
two whips ) to an opened-V line at broadside, to a closed-V line at the other
endfire.
The phase alone would do it except you have to keep rebalancing the gain
at each angle, so it's really a two dimensional adjustment to null something ;
just as, with the Kiwa loop, you have to adjust azimuth and elevation both.
--
Ron Hardin
rhha...@mindspring.com
On the internet, nobody knows you're a jerk.
mi...@sushi.com
guessing you need 40Khz BW.
IBOC should work with a wellbrook, since they are untuned.