Nt
Figure L Tri-bund J-pole tuuenrn construction. My finished antenna conformed very closely to the dimensions shown in igurc 1. and when i connected the feedlines I lud L5 l SWR or betler on all three bands. The center frequencies chosen lor this antenna are 146, 223, and 445 MHz, I had the antenna leaning up against a wood wall, and used a 12-foot scrap of coax to fine-tune the feed point. The stripped and tinned end of the cable was attached to each antenna section temporarily with Scotch tape....
It
Jrw nzrp ctwtatY Mike Walker KA0VFF at 38 6 Ash Avenue, Loveiand CO 80538. Figure 4. The overall dimensions of the completed Arrow Antenna. Figure 5. Two alternatives for the gumma match shorting bar. that it is close to the boom and mast. You are now ready to test and tunc your antenna. The antenna is tuned by sliding the outer brass tube out and moving the shorting bar along the gamma match assembly and test for the best SWR. In our experience, the antenna should be within acceptable limits...
Barry International Telex
Saturday & Sunday 10 A M to 5 P M (Frw ParVing) (RT LEX- 'Spr.ng St. Station, Subways BMT-Prince St- Station.UND-'T Train-Bwy Station Sus Broadway to Spring St. Path-9lh StJ6lh Ave Statten COMMERCIAL RADIOS STOCKED (COM. Motors 13 MAX ON, Slandard. Vaesu. We serve municipal it res, businesses. Cwp Oslense, etc. Portables, mobiles, bases re. uea & fs r. We Stock AEA. ARRL. AJincO- Amecot Ajneritron, Antenna Specialists. Astatic, Astron, B& K, B4W. BeWen. Bencher, Bird, Butternut. CDE,...
Network Qslcards
Box 13200, Dept. 73 Alexandria, LA 71315-3200 (318) 443-7261 or FAX your order to 310) 445-9940 piace of Li. With the optimum value for LI, the tuning range will be much greater than the 40 meter version. Output power is less. Operation on other bands should be possible. Certainly, 30 meters is a prime candidate. Before applying power to the transmitter, you should make a thorough visual inspection. Check for solder bridges, poor solder connections* melted wire insulation and component...
The Arrow Antenna
Hit the bull's-eye with this portable VHFsharp shooter. by Mike Walker KAOVFF and Al Lowe N0IMW How would you __tike a completely portable. 4-element 2 meter antenna that fits into its own I x I* x 48* boom Not only does it fit inside its boom, but it can be assembled in approximately I wo minutes. I'll just bet you are quivering with excitement Calm down and reach for a quiver of aluminum arrows. Aluminum arrows are the secret to the versatility and exceptional gain characteristics of the...
Ilot
Analyzer as I did, you can play around a bit with no fear of causing QRM. Repeat the process one more time and then recheck after raising the antenna to its final height You can see from my SWR chart that i missed by a hint because of impatience. The antenna is usable over the entire band as tuned, and the high frequency side of the SWR chart does offer the highest forward gain. . .(excuses, excuses). To install the antenna, i used a 40' four-section push-up pole, a wall-mounting bracket, and a...
Inature Pre
* GaAs FET Freamp similar to LNG, except designed for low cost & small stee. Only 5 8HW x 1-5 8'L x 3 4 H. Easily mounts in many radios. *Specify tuning range 25-35, 35-55, 55-90, 90-320, 12Q-150, 150-200,200-270, 400-500 MHz. COR-3 REPEATER CONTROLLER, features adjustable tail and time-out timers, solid-state relay, courtesy beep, and local speaker amplifier hit 49 Diode programmed any time in the field, adjustable tone, speed, and timer, to go with COFt-3 kit 59 If you always thought a...
Microwave Antennas
Loop Yagis, ower Dividers, Stacking Frames Complete Array Of 902. 910 1269, 1296, 1691, 2304, 3401, 3456 MHz. ForTropo, EME, Weak Sipnat, OSCARr ATV, Repeaters, WE FAX, Commercial point to point. Available in kit form or assembled and tested. 3333LYK 33eJ loop Yagi Kit 903 MHz 1B.5tf0i 95.00 2345LYK 45eJ loop Vagi Kit 1296 MHz 21 dSl 36.00 2445LYK J5el tOOp Yagi Kit 1269 MHz 21 dfii i 95.00 1344LY 440i loop Yagi iassem. 1691 MHz 21 dBi 1105.00 2355LYK 55el Superlooper Kit 1246 MHz 22dBi 5106.00...
Circle On Reader Service Card
Mew Technology patented converts any VBF or UHF FM receiver J I' J Yr- . i J , direction finder Simply plug into receiver s antenna and extern with computer interface, synthesized speech fixed srte or motnli Photo B. Sr. Manuel Valadao with Scouts and equipment COing on 15 meters during JOT A. Photo B. Sr. Manuel Valadao with Scouts and equipment COing on 15 meters during JOT A. and 1500s. As an outpost of Portuguese power, by which it could protect lines of communication and serve as a...
How To Use Mfj Hf Swr Model 247 Analyzer
If you operate 2 meters this MFJ-208 VHF SWR Analyzer helps get your antennas in tip-top shape. Just plug in the coax to find the SWR of any antenna from 142-156 MHz, Use 9 volt bat tery or 110 VAC with MFJ-1312, 12.95. NEW . , , Two Models for Commercial Radio MFJ-217 covers 30-50 MHz MFJ-218 ewers 150-17D MHz. These are only 149.95 each. self-contained handheld unit that'll revolutionize how SWR is measured, Super Value Several Instruments in One You get a super value because several...
Qrp
Michael Bryce WB8VGB 2225 Mayflower NW Massitlon OH 44646 What s beer your excuse for not trying QRP Don'i have the lime to build a small transmitter Can't find the parts for your project Perhaps you've never built a QRP transmitter and don't have the test equipment to trouble-shoot the transmitter it it tails to operate Weil, have I got a project for you this month It s a small crystal-controiled transmitter, already built and ready to go. Add a crystal, key and power supply and you're on the...
International Radio And Computer
International Radio and Computer is offering OSVer keypad frequency selectors lor 1COM, Kenwood and Yaesu radios. The IC-QSYer wili operate the following unmodified rigs IC-275 375 475 575 725 726 735 736 761 765 781 and R7000 9000. It will also control the tC-751Aand R-71 with COM UX-14 interfaces installed, The KW-QSYer will control the following transceivers TS-450S 690S 850S 950S with no interface required TS 940S AT with IF-10B interface installed TS-440S AT and R-5000 with C-
Call Or Write For Free Page Catalog
Leavey M.D., WA3AJR 6 Jenny Lane Baltimore MD 21208 For the past several months, we have been looking at various schemes to use a computer on radioteletype. Frorn sophisticated interfaces to plugin cartridges, there seems to be an answer for everyone, Everyone except the person on a limited budget, thai is. Well, this month, 1 have the answer for that situation as well Over the past several years, a program has evolved under the hands of German hams Florian Radlherr DL8MBT and Johannes...
Kenwood Electronics Canada
BOX 1075,959 Gana Court Mississauga, Ontario, Canada L4T 4C2 Here's a radio that deserves a double-take The TH-77A is a feature-packed dual band radio compressed into an HT package. The accessories are compatible with our TH-75, TH-25, and TH-26 Series radios. Repeater and remote base users will appreciate the DTMF memory that can store all of the DTMF characters , , A, B, Ct and D that are usually required for repeater functions Wide band receiver coverage. 136-165 118-165 AM mode 118-136...
Down East Microwave
Bill Olson, W3HQT Box 2310, RR1 Troy, ME 04987 People who live in apartments or condos are constantly searching for new ways to get out an HF signal. There are several ways to solve this problem, if ihe landlord is willing to let you string wires outside the building, but more often than not the problem is simply that no antennas are ailowed . , .period. The typical suggestions for ''invisible antennas are usually not very invisible, especially over a period of time. An HF vertical disguised as...
Cs
EEMOTO ts a new generation of Rotators that are out to set high standards EMOTO supplies over 60 of the Japanese market with many innovative features. EMOTO also has an AZ-EL Rotator with computer HO ports, for those working satellite or EME Moon Bounce. Ask your dealer today 1200FXX Stop By And See Our Booth At The Dayton Hamvention Photo C. Schematic diagrams can be drawn with Easy-PC with the built-in library of symbols. The default colors are red and blue for track layers and white for the...
Startek International
Two new Pocket Counters from Started are actually ultra-high-sensitivity RF detector-counters with 2 10-segment LED signal-strength bar graphs. The bar graph functions independent from the digital frequency counter and wilJ indicate the relative strength of an input signal at any frequency from 500 kHz to 3 5 GHz. ' Dot graph or bar graph operation is switch-selectable and the sensitivity is adjustable The bar graph is ideal for locating or adjusting an RF signai. The digital frequency counter...
Gcx
Gain amp Wave USMHf 21MB V i wave 446MHz 5dB s i wave X 2 Max Power 5D watts Length 30lf Connector UHF PL-255 , OR H WO -20 NMO G n 4 Ware 46MHI QdB Vi wave 44iMHz2.15dB V wwe Mai Power 50 walls Length ir Coflnecio UHF PL 259 , Ofl NMO R-10 NMO 2M-70CU1 DUPLEXERS CF41 amp A All UKF Corwvtotfs fW 146MK OOW CF- 1E2K A3 UHF Cwrs w s L acs 44 MKZ 50 W CF IMt 0 0. W 44 l igul Photo B. Boys, girls men, and women compefe in various categories, trying to find the five fox transmitters. This Russian...
Info
Operate on FM as well as SSD swiichable . fittlMHMMHtafe I A21 SOH LA2065R M4W in 65W out LA208011 1 -5 W in SOW out LA 215511 1.5 or 25 Win 1 SOW out Linear Amplifiers All Amps have lo-noise gas-fel receiver pre-amp, with l5dB gain all amps operate on FM as well as SSD swiichable . fittlMHMMHtafe I A21 SOH LA2065R M4W in 65W out LA208011 1 -5 W in SOW out LA 215511 1.5 or 25 Win 1 SOW out Cross Needle and Digital SWR Power Meters for AH Brands Rugged, Efficient, Low Cost answer to SWR...
Cis
A simple electronic TR switch for 7 MHz. The variable capacitor is adjusted for maximum receiver sensitivity. This will be around 50 pF with a non-reactive receiver input. D1 and D2 are high-speed silicon diodes such as 1N914 types. Receiver overload is severe not damaging . Some form of automatic or manual gain control may make the keying sound better in your station receiver. The pride and satisfaction of telling another operator, Rig is home-brew, has to be experienced to be...
Shinwa Pocket Pagers
The fire department hazardous materials response teams and police department SWAT crews that need reliable radio alerting systems, stake their lives on Shinwa. We offer a two-rone pocket pagerwilh monitor feature and even a voice storage option at an affordable price. To order, we need your paging frequency as we I a s to ne re e d treq e nci es. For o h e r confi gur a tio ns or two-way radio information, please fax us your specifications to 313-663-8888 or phone 313-996-8888. list price...
Cobra Radar Detectors
RD3163-B Cobra 3 band radar detector____________ 109.95 RD3175-B Cobra 3 band radar detedOf 129,95 RD3173-B Cobra 3 band radar detedor 139.95 RD3183B Cobra 3 band radar detector 139.95 List price 509.95 CE price 239.95 SPECIAL 12 Band. 500 Chanrd. Handield. Saidi.tMt Hold. Ptiority, Lockout Frequency range 29-54, 118-174, 406-512, 806-956 MHz. Excludes 823.9075-849.0125 and 868.9875-394.0125 MHz Th amp Bearcat 20QXLT sets nnew standard lof handheld scanners in performance and dependability....
Standard Amateur Radios
-- _ i - -- _ 1.-- n---- ll TOUCH-TONE DECODER DISPLAY amp ASCII CONVERTER BOARD Model TDD-8 clccod s and displays 11 16 DTMP dibits, Digiti are di pj amp ed an t ight LEDV. 32 character buffer can be scrolled, It will accept almost any audio source. ASCII serial output can ct gt i nected to your computer. IBM compatible software included ibr automated lo in ii tincl alerting cT uf r specified numbers. IDEAL FOR UNATTENDED LOGGING OF VOt'R AVTi 'PATCH 1RAFFIC TDD S tlTMF DECODER DISP jAY 0C11...
