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- Subject: Condo Communications
-
- Welcome to the third exciting, thrill-packed issue of Condo Communicator, a
- newsletter devoted to those amateurs who, for various reasons, must configure
- their stations to operate from restrictive areas such as condos, apartments,
- townhouses, neighborhoods with outdoor antenna restrictions, ships/boats,
- mobile homes, or wherever they fry their burgers and call QTH.
-
- TABLE OF CONTENTS
-
- Station Descriptions.............. N5OP, WD8RIF, KC7IT, KM6CG
-
- Technical Correspondence.......... Forthcoming book by KR1S
-
- Bibliography...................... N0OQS
-
- There's quite a lot in this issue. I'll let the contributors do the talking
- (or writing) and keep my comments to a minimum.
-
- STATION DESCRIPTIONS
-
- Kim, N5OP, describes his former condo abode: "I had limited success with a
- long-as-I-could-make-it vetical dipole that was capacitively loaded on both
- ends. It worked best on 40, 30, and 20 m but I had RF feedback/grounding
- troubles on 15 and 10 m. And the RFI problem was difficult to address, since I
- was doing all of this clandestinely. I camouflaged the antenna with the paint
- they were using to repaint the condos and it really was hard to see :-) I put
- it up on a cloudy weekday, about 10 AM, so as to have as few witnesses as
- possible! I fed it with 450 ohm ladder line through a tuner and worked quite a
- lot of DX (VE, XE, JA, ZL, VK and a very few Europeans) on whatever power
- level I could get away with (50 to 100 W). It was fun and I felt that
- I had pulled it off for the most part, but learned that I couldn't
- operate as freely as I wished due to RFI and neighbors who objected to
- the basic idea :-( "
-
- Eric, WD8RIF, was sent overseas for Desert Shield/Storm: "...and the gear I
- took was a Sangean ATS-803A receiver and a 31 meter dipole, for listening. I
- strung the wire between our tent and the neighbouring one. It worked pretty
- well, until the wind destroyed the dipole, at which time I made it into a
- random wire."
-
- Upon returning: "...I found a nice flat, and the landlord there allowed, nay,
- helped install a 20-foot mast supporting a 2m quad, a 2m ground plane, and a
- ten meter dipole. The 2m work was mostly packet, and unfortunately, the 10m was
- mostly useless due to neighbourhood electrical noise. I also had a 31m dipole
- strung along the ceiling for the ATS-803A, the same rig that went with me to
- sand-land."
-
- Mike, KC7IT: "FYI: I once worked a guy in Hawaii via OSCAR-13 who was in a
- restricted condo situation. He kept his antennas and rotator on a
- free-standing tripod (like the Radio Shack variety) in his garage, and just
- walked it out onto his driveway whenever he wanted to operate. So long
- as you can see the part of the sky you need, altitude is no advantage
- in satellite work."
-
- Howard, KE7QJ: "I live in a single story townhouse with a flat roof - thus I
- can erect a 30-m length inverted-V, fed with ladder line, and work 10-40 via an
- MFJ-948 tuner. Rig is an IC-735 at 100 watts. Works great, but, still, 5-9 into
- some of one of my neighbor's telephones....We're working on it.
-
- "The townhouse covenants say 'no antennas unless completely concealed from
- public view.' Well, you CAN see mine, if you know exactly where to look, and
- from where."
-
- Howard goes on to describe this inverted-V antenna: "...the center point of the
- inverted V is about 7' above the wood roof. There isn't much metal around,
- except for the heat pump and its ductwork below the antenna and feedline: far
- more directly underneath the feedline than the antenna itself. TVI is minimal,
- although my telephone RFI neighbor reported it to me, along with light
- interference to her stereo. Her TV is connected to CATV, and I think her stereo
- is, too. This is my neighbor to the north, and it's a 2-story unit. I would
- guess that her upstairs wiring, in-line broadside to my antenna, is picking up
- my signals. My neighbor to the south, literally closer to my antenna, report NO
- interference of any kind. Then again, they don't have fancy electronics."
-
- As far as grounding is concerned, Howard states: "I am in a one-story unit,
- thus my station is at ground level. The units are 8 years old, so they're
- fairly new. The ground wire of the electrical outlets connect to the outside
- cold water pipe. If I ran a heavy wire to my 'cold water pipe' it means I'm
- actually forming a ground loop! Thus, I have no real ground. But my dipole has
- its own built in RF ground, so who cares? If I REALLY want to get serious, I'd
- get a galvanized ground rod and attempt to drive it into this desert soil. But
- the nearest soil is 14 feet away! That's going to be resonant on some band or
- another."
-
- Ed, KM6CG: "My QTH is a third floor apartment. I use a Yaesu FT-301D which is
- a transistorized 80-10 M transceiver. It's supposed to put out 100 watts
- when equipped with a 20 amp supply. I run it with the gain backed off
- and I put out about 20 watts. I run 40 M CW exclusively. I don't really
- have much luck with SSB at these power levels, but that's OK. I got this on
- the air to build my code speed and don't operate as much, now that I got
- over the 13 WPM test.
-
- "My antenna is a 40 M 'Coaxial Dipole' as descibed in 73 in 1981 or
- thereabouts. It runs around the living room and kitchen ceilings. I
- use a counterpoise, since I don't have a decent ground. I have a low
- pass filter, and I don't get into OUR TV or any of the neighbors I
- checked.
-
- "I live in San Jose, CA. I've contacted about 30 states and two Canadian
- provinces. 40M is good mostly after dark for me. I can hear a band of
- stations in the midwest (IL, OH, TN, KY) and another in the west (NV,
- UT, AZ) as well as lots of Los Angeles and Vancouver/Seattle stations.
- I hear JAs in the middle of the night, but haven't worked one yet.
- Haven't tried hard though. I have trouble hearing east coast stations
- like NY and NE, although I've got a few.
-
- "I also run local two-meter packet. My antenna is a 1/4 wave mobile
- mount with a 1/4 wave wire dangling, to make a 1/2 wave dipole. It's
- secured to a strip of aluminum (hanging file folder rail) and it sticks
- out the window about 18 inches. It's secured by sitting something heavy
- on the other end."
-
- TECHNICAL CORRESPONDENCE
-
- Be on the lookout for a book by Jim Kearman, KR1S, "Low Profile Amateur Radio,
- How to get on the air from almost anywhere." This book is at the printer
- right now and should be available soon for $8.00 from the ARRL and dealers. Jim
- tells me that it will deal with keeping a low profile (like a spy), setting up
- a home station, setting up in the field, operating mobile, etc., and will cover
- HF and VHF/UHF. Some simple antennas are included. It will also address RFI.
- I'll review it as soon as I can get a copy.
-
- I'm sure many of us would like to hear from anyone with some theories about the
- RFI (or lack of it) reported by this issue's contributors. Some folks have
- little or no RFI, and others have to really restrict their operations because
- of it. Why? The type of rig used? The type of TV, stereo, and telephone?
- Grounding? (Which may actually *cause* RFI?) Type of transmitting antenna or
- its placement? Your explanations would be most welcome.
-
- BIBLIOGRAPHY
-
- Only one article for the library this go-around:
-
- 1. Ford, Steve WB8IMY, editor
- Zack Lau, KH6CP/1, guest author
- Limited Space Antennas
- QST
- December 1992
- pg. 85 As Steve says in the introduction to this Q&A column, "ARRL
- Laboratory Engineer Zack Lau, KH6CP/1, has spent years grappling with the
- challenge of operating in limited-space environments." A most informative
- article about losses, RF fields, tuners, and so forth. You can have great
- SWR but crummy radiation. Read this.
-
- Okay folks, let's hear from you! Send your notes, ideas, station description,
- war stories, and so on to me at:
-
- Packet: N0OQS @ W0GVT.#NECO.CO.USA
- Internet: awinterb@du.edu
- US Snail: Art Winterbauer
- 10047 E. Mexico Ave.
- Denver, CO 80231
-
- Also, listen for snippets of this newsletter on Hap Holly's (KC9RP) Radio
- Amateur Information Network (RAIN), heard on various nets or by direct dialup
- (708-299-INFO, no charge except for long-distance costs).
-
- (By the way, this newsletter is no longer distributed via packet. Local packet
- congestion prohibits uploading to either of the local forwarding PBBSs, even in
- tiny hunks. Besides, you should have heard the HF forwarding stations howl!)
-
- 73,72. Art.
-
-