Describe your experience with the slim jim portable 2 meter antenna by n9tax and tell us why you give it the rating you did required. Enter 2 values from voltage, current, power or resistance, to find the remaining two. I am looking for a portable antenna for use with my ht for campinghiking trips and for an emergency bag. K5luo shows off his 2 meter slim jim antenna made from old j pole antennas using hamengineering well i got the slim jim built. The main category is slim jim antenna that is about slim jim antenna.
This link is listed in our web site directory since thursday dec 2012, and till today 2 meter slim jim antenna has been followed for a total of 946 t. Ive been reading several articles on the net about them and how to tune them properly. Many have tried to copy this antenna over the years but none compare. If you decide to make a 2m antenna, youll end up with 1.
A wide variety of no2 gas meter options are available to you, there are 167 suppliers who sells no2 gas meter on, mainly located in asia. I specialize in a certain type of antenna called a jpole. This link is listed in our web site directory since wednesday mar 8 2006, and till today 2 meter slim jim copper tubing antenna has been followed for a total of 19103 times. Jan 29, 2014 download micro meter widgetlike application which enables you to always monitor your cpu and ram usage from your desktop, with a clearcut interface. Here are the plan i use for constructing and experimenting with slim jim antenna on 2 meter vhf amateur band. I borrowed an swr meter from another local ham, followed the measurements of the antenna very carefully, but im having a terrible time getting. Meter has a small, vertical footprint as compared to other metering devices on the market. The pm16 compact usb power meter with slim silicon photodiode sensor is designed for optical source power measurements in locations where space and accessibility are at a premium. This antenna is made from a length of 300ohm ribbon cable, which makes it easily portable, but you have to devise some method of suspending it. The meter factors used will be determined from a straight line interpolation of the meter factor and its associated flow rate. Slim jim and jpole antenna calculator build a cactus for any frequency. Icom 720a ft897 ft2800m mfj993b tuner my homebrew 50amp power supply.
During modelling, a slim jim for the 11m band antenna at 10m in height above the ground had a radiation angle of only 9 degrees above the horizon making it an excellent base antenna for longer distance contacts. Most such communications are accomplished using vertical antennas, so i was looking for a short vertical antenna. The meter cannot communicate on the n2 bus without power. Vortex slim jim vertical antenna vhf 5054mhz 6m band. Howto 2 meter slim jim antenna from ordinary wires. The n2 bus cable should be shielded twisted pair wire belden 1120a or similar. No longer so you have to try to fit the antenna in your car, as the breakaway antenna pieces are approximately 30 inches long when collapsed. Foxtrot bravo is a frebanding dx group on the 11 meter band. Input limits function maximum input v dc, v ac, frequency, duty cycle 600v dcac a ac, a dc 400a ac. The final height is about 40, fed with belden 99 low loss coax. During modelling, a slim jim for the 6m band antenna at 10m in height above the ground had a radiation angle of only 6 degrees above the horizon making it an excellent base antenna for longer distance contacts.
Its easy to make, fairly easy to tune and rollsup for transportation it wasnt until i started operating p that i found a requirement for a decent 2m aerial overandabove the rubberduck on the handheld. The majority of two meter work is local communication, and the majority of that is done via repeater on fm. Looking for autonics 2 din scaling panel meter 11y548. A vertical wideband antenna for the 50mhz 6m amateur band. Hello, would you like us to contact you regarding pqmii power quality meter. Ii for 120 and 230 v external power supply input impedance. Why is the slim jim so much more efficient than the popular 58 wave or other ground plane antennas, despite the latters claimed 3db. The radios themselves are, in my opinion, quite good but like most handhelds, they are let down by their small rubber duck type. Jan 18, 2008 here are the plan i use for constructing and experimenting with slim jim antenna on 2 meter vhf amateur band. Measure up about 4 inches from the bottom and remove the insulation from each side of the slim jim antenna using the 4 inch measurement as your center point and remove the insulation about 2 inches up and down from the 4 inch mark to give you access to the.
Slim jim j integrated match jpole is probably the most easiest and powerful 2 meter antenna to build provided you have the exact measurement and material to build it this how to will show you how to build a 2 meter slim jim antenna from ordinary insulated copper wire commonly used for carrying ac alternate current electricity in your household. Power monitoring h80258026 series networked n2 bus power. With many options available as well as a variety of customizable features, the type ii meter can be optimized to measure nearly any. Finally search on internet find a slim jim antenna schemes. It is very easy to build and does not take days to construct. This how to will show you how to build a 2 meter slim jim antenna from ordinary insulated copper wire commonly used for carrying ac alternate current electricity in your. The breakaway slim jim antenna has a screw connector in the middle for easy transport and storage yet it still retains all the performance benefits of the single piece slim jim antenna. Well i want a small cheap and useful antenna for the second transceiver. The main category is antennas for 2 meters band that is about antenna projects for 144 mhz. My name is michael, kb9vbr, and i carry a full line of vhf and uhf antennas for sale.
About 2 meter slim jim antenna the resource is currently listed in in a single category. The n2 bus cable should be mechanically secured where it enters the electrical panel. Just like the calculated swr, the real slim jim had swr below 1. This in itself says something about the dedication i have to creating a quality product. The halfwave section is then folded back on itself towards the stub at a distance of approx 0. Slim jim talk antenna radio electrical engineering. A slim jim antenna is basically similar to a jpole design, but it is supposed to exhibit a lower radiation angle in the range of 8 degrees on the horizon, compared to 12 wave jpole which exhibits a 20 degree angle on the horizon. Therefore, it is best to connect the voltage leads ahead of switching devices. It was a 20 ton job, we installed 40 tons of slim jims. Most usually vertical polarisation suited to home construction provides good omni directional performance. The slim jim, designed by the late fred judd, g2bcx, can be a great portable roll up antenna, if made out of 300. Download micro meter widgetlike application which enables you to always monitor your cpu and ram usage from your desktop, with a clearcut interface. After wiring the n2 bus cable, remove all scraps of wire or foil shield from the. N2 bus oa ob oc typical 240120 vac 1o, 3 wire installation 120 neutral 120 n2 bus black ct red ct oa ob typical 277 vac 1o, 2 wire installation neutral 277 n2 bus black ct red ct yellow ct oa cap yellow voltage lead cap yellow voltage lead note.
Use a screwdriver and pliers to release one wire from beneath one of the rivets on the 58inch element. I have also an old super j antenna but im looking for another one. Slim jim antenna discussion origins of the slim jim invented by fed judd, g2bcx original design was for a single band overall length is nominally l 1. Two meter, as a vhf band, requires a comparatively short antenna. A vertical wideband antenna for the 27mhz 11m band.
Foxtrot bravo discussion forums antennas home brew. Update to slim jim calculator m0ukd amateur radio blog. The vortex slim jim antenna consists of a single element, one half wavelength long radiator with a quarter wave parallel feedline tuning stub. Measure up about 4 inches from the bottom and remove the insulation from each side of the slim jim antenna using the 4 inch measurement as your center point and remove the insulation about 2 inches up and down from the 4 inch mark to give you access to the conductors on each side of the antenna for swr tuning. Page contents page contents i nt ro d u c t ion pr epe r at io n l o c at io n g en e r a l bo i l e r in te r n a l l ay ou t i. I have added the ability to include a known velocity factor into the slim jim j pole calculator, to help with building them with 450. Full of resources from dx information, eqsl, starter info and qsl email bureau. System types the slim jim boiler range can be used in various system designs including under floor systems. Add a loop of string to the top, and hang it on a tree branch, use it with your handheld transceiver, then roll it up. Mar 31, 20 a slim jim antenna is basically similar to a jpole design, but it is supposed to exhibit a lower radiation angle in the range of 8 degrees on the horizon, compared to 12 wave jpole which exhibits a 20 degree angle on the horizon. Firstly the angle of radiation is exceptionally low. The slimjim is a bit of a classic building one is almost certainly a rite of passage and youll be glad that you did. This link is listed in our web site directory since thursday dec 2012, and till today 2 meter slim jim antenna has been followed for a total of 946 times.
Meter 4 aa alkaline batteries or via docking station docking station 612 vdc. Discussion in directv installationmdu discussion started by soulweeper, feb 12, 2017. All n2 bus devices should be connected together in a daisychain fashion. This meter has been designed for safe use, but must be operated with caution. Most people make these for 2m use, but you can make them for 70cm use if required. Digital thermometers free delivery possible on eligible purchases. Judd, g2bcx get that signal lower to the ground for better performance. Graphically, the linearization method used can be represented as a point slope function between points. Slim jim antennas have two very desirable characteristics. Vat download a pdf document for wj4 4m 70mhz portable slim jim folds down to pocket size.
The top countries of suppliers are china, hong kong s. Would you like us to contact you regarding pqmii power quality meter. Allows direct view of kwh accumulator as an ai point. Never apply voltage or current to the meter that exceeds the specified maximum. As a newly licenced amateur, those chinese made handheld radios are a tempting way to get onto 2m fm cheaply and quickly. On the ground 11 up the swr across the 2 meter band was less than 1. The rules listed below must be carefully followed for safe operation. Howto 2 meter slim jim antenna from ordinary wires please. Wj4 4m 70mhz portable slim jim folds down to pocket size. Other useful information would include your experience with similar products, infomation on a product that you would purchase instead of this one, and so on. Often my main dual band vu antenna occupied on repeaters. This calculator can be used to design a slim jim or a j pole antenna. The measurement used are designed to center around 144148 mhz radio frequency, which is used by amateur radio world wide.
Slim jim j integrated match jpole is probably the most easiest and powerful 2 meter antenna to build provided you have the exact measurement and material to build it. But i have a problem somewhere in the distribution chain. Vortex antenna systems radio communication antenna. The 450 ohm ladder line slim jim antenna hamuniverse. About 2 meter slim jim copper tubing antenna the resource is currently listed in in 2 categories. The design called for double the number of plates needed. Jb10s1 jb10s3, s5 jb10s3, s5 jb10s3, s5 pre 1998 pre 1998 19982003 wo vent kit. My latest project is a slim jim antenna for my 2 meter radio, made from copper pipe. The 5 mm thin sensor end can fit between closely spaced optics, cage systems, and other arrangements where standard power meters may not fit. After tracking the slim 5 satellite dish i pass the eiv test on all four lnb outputs at the head end cable location where the cable comes in. Buy uei test instruments ssm1 super heatsub cool meter. Its easy to make, fairly easy to tune and rollsup for transportation. Ive been producing these antennas professionally for nearly a decade now and have sold over 15000 units.
Also, here is a tested and reproducible slim jim for 70mhz 4m made with 450. Using an icom 208h several of the local repeaters in a 25 to 30 mile radius were successfully contacted. The vertical footprint of the standard type ii meter is only 36 in vertical height. The 2 meter slim jim copper tubing antenna project by richard ke5fxu sk updated 1162012 credit for the original design goes to f. The dimensions quoted in the diagram have been used successfully by some constructors, whilst others have found it to be offfrequency by a few megahertz. My mind goes to j antenna but i looking for something better than this. Aea pk232an oldie but a goodie hi hi my keyerdont pay attention to the dust well i have alot more stuff but that is the major equipment. The n9tax slim jim antenna is the highest quality roll up antenna available today. Fyi this is the plan that i use to construct my first ham radio antenna using pvc pipe and aluminium tube. Wj4 4m 70mhz portable slim jim pocket size radioworld.
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