Radio Amateur 04-1992

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...

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...

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....

Austn Antenna

Austin Antenna is offering FREE software to facilitate the design of inductors, chokes and ferrite toroids. Several capabilities are included in the software. Inductance can be calculated from turns, diameter, wire Size and coil length, and vice versa. You can build inductors using wire that you have orr hand. Straight wire inductors and ferrite toroid design rules are covered as well Inductance can be determined from inductive reactance. Also included in the to-chip set Installed TS-140S 680S...

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...

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...

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-

Circle On Reader Service Card

The board is mounted on a clear piece of Plexiglas . The PL-259 antenna connector is wired to the board via RG-i 58 miniature coax. A key jack is at lower left. If you want a simple way to generate stable signals, a crystal oscillator will do nicely. The only problem is, yon have one available frequency per crystal. This transmitter will ''bentT' the frequency of your 4rock quartz crystal to create a tunable oscillator. The 4Rock Bender features two stages, an...

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...

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...

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...

International

Arnie Johnson N1BAC 43 Oid Homestead Hwy. N. Swanzey NH 03431 f have been truly enjoying myself rhe past several weeks before writing this I have been assisting with the testing of a Bulletin Board System (BBS) for packet radio. The operator of the BBSScott WA7 YTW, inherited another operating BBS and computer after another ham, Alan W1FYR, decided that he could nof continue to operate two BBSs at the same time because if he didn't make some time for himself and his family he would be by...

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...

Communications Receiver

Continuous coverage from 100 kHz to 2036 MHz in a three-pound package. Photo A The AOR AR-3000 communications receiver. Few receivers offer good coverage on both shortwave and public safety bands, and those that do are high priced and include sophisticated features not needed by the average hobbyist. With today's soaring costs, economy of equipment is important, particularly for the operator on a limited budget That's why the introduction of the AR3000 communications receiver is a welcome...

Lead Inductance

A typical capacitor at 1-2 GHz. to 30 pF or so), Chip capacitors can be supplied even in the pF ranges. Of courseH ihey are not suitable tor microwave work only the very low pF ranges are used at RF. The RF bypass capaciior is the exception Other available chip lype components include inductors. fuses, diodes transistors and about anything else you care to mention. Most components are made for low frequency work to reduce circuit sizer and some are usable at the microwave level You...