Percent Of Tower Height

Pilot-catenary back-guy method ot erecting antennas. called pilot-catenary back-guy (PCBG) system, shown in Figure 4 With this method, the antenna rides into position while being suspended from a pulley that rides on the pilot catenary cable. A back guy cable, 180 degrees opposite the pilot catenary, eases stress on Ihe lower and mast This method requires the top set of guys to be temporarily dropped to avoid entanglement with the beam as it is being raised into position The back guy...

Mast

Assembling antenna with PVRC mount. Free-standing towers certainly are convenient. Unfortunately, they are also considerably more expensive than their guyed equivalents, so it's not surprising that many hams find themselves with guyed towers. Depending on the circumstances, positioning any jBefore ever leaving the ground, the climber and ground crew should have a firm plan in mind,' Figure 2 Raising antenna sections to be assembled on tower. Figure 2 Raising antenna sections to be...

Urban Antenna Restrictions

Moving to a new location provides a great opportunity to straighten out the amateur satellite antenna system and put everything together the Right Way, No more old coax, failing relays, noisy rotators, or rusted bolts. Significant improvements, more efficient operation and a clean installation always wait at the end of the rainbow. Ten years ago, before buying my previous home on the far outskirts of Houston, checked with the town s architectural committee about antenna restrictions, Their...

Thailand

Tony WalthamHSIAMH International Liaison Officer Radio Amateur Society of Thailand Within a few months we expecl operations by licensed operators to resume in Thailand Under new regulations, operations at first will be only from club stations. At the end of 1982. the Society (RAST) advised its members transmitting HF to go QRT while the Post and Telegraph and security agencies reviewed the question of amateur radio with regards to fully legalizing the activity as has now been done, in order to...

Mfj

Fledged weather maps on your printer. Oi tier interesting FAX pictures can also be printed - such as some news photographs from wire services. Any Epson graphics compatible printer will print a wealth ofin teres ing pielnresand maps. Automatic sync and stop It is you set it and leave it for no hassle print You can savi FAX pictures and WFFAX maps lo disk i your terminal program lets you save ASCII files to disk. Pictures and maps can be printcfl to screen in n-ai time or front disk on IBM and...

Circle On Header Service Card

Amateu i Aduanc* Comm. - lANlmjiiglofi, DE Amateur Gomm ET- -SanAnnoHo TX A ES Hl *Mr W1 AES - OTifcnso FL AE5 - Clrewalv FL AES - UW sjft*. KV al J t Aira euf Radio Supply - Aoafcn. fx E ectrorttci W fort. K Suranarai Anutwf Genie* - Wttferrown, SD - .- ii > Colorado Com m enler - Denver. CO Dataware Anrmtiiuf Supply - New Cnatta. DE DacJ Coimnujnicntinns - FLosavHiu. GA El Orignal Eiern'if-rc* ftwtsvill . l > , Alinco's products are carried by these aoienti. NH y Enckson Comntvnlcatidfw -...

Okf

E-Z CODE Complete novice code course on 90 minute tape by master instructor SB postpaid. Practice tapes at mosi speeds from 5 to 20 wprn 7 postpaid. E-Z CODE, Box 29013, Atlanta GA 30359. QNB744 SOLAR POWERED HAND HELD Using unbreakable Sovonic photovoflaic laminates Ideal for charging up those Ni-Cad battery packs One wattH 12 volts at 70mAT S27.50 Two watts, 37 50 First class shipping included More Info Send SASE' to SunLight Energy 2225 Mayflower. MassillonOH 44646 BNB747 BACK JSSUES 73....

Uniden

Uniden Corporation of America has purchased the consumer products line of Regency Electronics Jnc, for 512,000,000, To celebrate this purchase, we're having our largest scanner sale in historyr Use the coupon tn this ad for big savings. Hurry offer ends July 31, 1988, Ger spinal savmgs on the scanners tiSfed in ifljs coupon. Thts coupon must bo included witn your prepaid order. Credit cards, personal checks and quantity discounts are excluded trom this otter Otter sai< d only or money orders...

Atech Electronics

A-Tech announces the S G Repeater Controller. It provides basic repeater functions, Voice ID, programmable Morse code tD, Autopatch, Reverse Autopatch, audio mixing, 16 I O lines which control link radio, PL tones, relays, and a complete manual. An optional phone patch board is also available Touch tone commands are used to control the features such as the courtesy tones, tail squelch length, CW ID, and alarms. The SIQ repeater controller is available for 349,95. With phone patch, 449.95....

Circle S On Reader Service Card

Where visions of grandeur were mercilessly QRMed. I stepped confidently into the class rot > m, Jfcrteu was going to revolutionize the teaching of bam classes. Rather than the ere u of prospective Novices* my eyes were filled with vision of fame, fortune, and manufacturers eagerly pressing free samples of their latest gear on me. hoping to bask in the re fleeted glow of my prowess, I received mj Novice ticket about a year ago. I felt like the king of hams wrhen my Elmenold me he never kneu of...

Tda

Coding lor the above tabfe DCAL - Dual Coded Relay uuch 4QCFIL 4 jigit Coded Relay Latch RY - Relay NOjNC Normally Open Normally Closed Refer to the 4D CRL foil layout in Figure 10. The builder must connect a wire trom the collector of Q1 to the blank space of the card-edge connector after the fourth card edge trace from the left , i his allow s connection of external relays. LEDs. etc. Make sure to lest each module individually. Hand-draw a diagram using only the completed module as a...

Info

UHF MODEIS KJtwttnC 69 JUtlesiCw H9 Wttti kW 4 SS U JS-30 435-4 JT S30 1 4 149 4U4K WM 4JJS Si cdt iok for full tint of2w transmitting converters for vtjfAuhf. Hits only S 79. Linear Amplifiers Mvall. up to 50 65-J MOUL ROAD HILTON NY 14468-9535 Phone 716-392-9430 H tntftm em it m rtgii iwrwft trmttrnmark. Hornblower does more than jusT horns. Originally, a DTMF coded system was conceived to allow remote control of household features, such as Lighting, air con-djt toning and hoi w ater heating...

Pakratt

Morse Code - Baudot - ASCII - AMTOR - Packet - Facsimile - Navtex It s a lesson you leam very early in life. Many can be good, some may be better, but only one can be the best The PK-232 is the best multi-mode data controller you can buy. The PK-232 should be listed in the amateur radio dictionary under the word Versatile. One data controller that can transmit and receive in six digital modes, and can be used with almost every computer or data terming. You can even monitor Navtex, the new...

Made Ik

Covers 100 MHz to 199,999 MHz in 1 kHz steps with thumbwheel dial Accuracy - 1 part per 10 million at all frequencies Internal FM adjustable from 0 to 100 kHz at amp 1 kHz rate External FM inpul ac cepis iofws or voice Spurs anc noi amp e at leasi 60 OB beJow camef Output atf uMable frofln 5-500 mV a 50 Ohms Operates on 12 Vdc v Amp Available tor immediate delivery 5429.95 delivered Add-on accessories available to extend freq range, add infi nite resolutory AM, and a precision 120 dQ attend...

Packet Raeno Handbook

Gives you a minicourse that includes the development of packet radio how to combine packet with other areas of amateur radio in civil defense communications traffic handling modulation methods and networking principles the use of protocols, AN1 MORE You'll want to join the packet bandwagon after reading KR3T s fact-filled Packet Radio Handbook Order your copy nou Mulm lfm infrrtnt US lt mqf window f r ihr FEST wertet. Two VERY powrrful ntciioti cum hold firmly fot rtti fc'hipi r e CDpr W gt Tt...

Datongs Great Add Ooi Filters

Datong Products Price of FL3 229 95 Price of FL2 159 95 Price Of AF F 119 95 Happy are they that hear their detractions and can put them to mending. Shakespeare When I i-rst received the Datong audio filters for review L thought, Uti huh. more audio filters, just what the worfd really needs Well, I was wrong for thinking such negative thoughts. The Datong filters are just what the world needs. For my primary operations I use a Kenwood TS-430 and ICOM 751 A. The backup rig is a Drake TR3. Don t...

The Rf Connection

SPECIALIST IN RF CONNECTORS AND COAX .-259 Teftor n ervv UHF Maie Stiver Tefkm, USA Re cer fof RG-53 N MaieRG .213,214 Amjjhefini NWaieRfr J13.214 y.aie fcif 9913.9Ct.G t IJ W ie io RG B-iin v ' aie fw fr.ffi S9UF- Mate to SO Teflon U amp i N Female to PL 2S3, Teflon uSA

Ace Communications

Also new from AOR is a 25-oz. mobile scanner, model AR160, The receiver covers 29-52 MHzh 136-174 MHz, and 436-512 MHz. It includes a fused DC power cable, telescopic whip antenna, mobile mounting bracket with hardware, and an AC to DC converter for indoor use. A battery retains the memory if power fails. Also included is LED display, 20-key access to the microcomupter, and high receptivity for only 189. Ace Communications will handle product marketing and service through their Monitor Division...

Diy Cw Keyer

After iwo months of hightech digital communications, it seems ironic that this month we're about to build a CW keyer. But what the hell, thafs what we're going to do, This is such a simple construction project that it would be unfair to even consider il a weekender 1 Perhaps a rainy Sunday afternoon would be more realistic. The entire keyer is so simple thai construction is limited to two integrated circuits. The timing and logic are supplied by integrated circuits 4027 and 4011 CMOS. A printed...

Function V Memo

Hand Held Transceivers From Alinco Are Just Around the Corner Introducing The DJ-100T 2 Meter Hand Held Transceiver J H Tiny 1-3 16 D x 2-3 8 W x 6-5 8 H Tough 6.5 Watts With Optional EBP-8NAZ Nicd Battery Pack V H Terrific Features and Benefits I IH Nr. ,. LCD with Switchable Backlighting 16 Button DTMF Pad 3 A' Easily Accessible Dip Switches For Encoding l j Battery Save Draws 15ma For Extended I HeH Battery Life I 144.00 MHz to 147.995 MHz H CAP and MARS...

Datong

The ANF is an automatic notch peak filter with LED tracking, The ANF is in a smaller box than the FL series fillers. Photo A The FL3 is full featured to provide complete control of received audio. Photo B Notice the W segment LED bar graph at the top ot the ANF for displaying search and lock action The secret to a good receiver is selectivity. The better the selectivity, the better the receiver A filter with very steep skirts is required for razor sharp selectivity. Using 5 pole computer...

1

Offer vajta loru limited rime niy Canadiitii and lompti surfsicc urdcrs ttperyau 12 isMUC i V-.S. uiulI'-t'lcxst jIIitw 4-fi weeti fordcli Lf gt i if fir M issue Hrpe gifla art sum tn piU syhitTihera onl Mail Coupon in T imMeur fttadiar P.O. Hov 931, ranniiiitd t fn 11737- 31 j jP 1 V E I yCn yuP f L yv JPlg 7 k I PTL M I n Jg Pass the 13 wpm test by participating in code nets One of the t ost ways to increase code proflcieoc is to participate in code nets. Novice and Technician operators can...

Tenna Phase Iii Power Supplies

Outpitl 13 flV DC 3 amp constant 5 amp suto eietkonic DutfMprofc tnnw in stani auto resei fuse p'oietitrf PS4 1990 Fulty reg . aleo. T3 S DC 4 mps COfl slant rtr'tn - UT prottctKkn o kiai Dro leciioo A msian atilo fesei fully reflulaled 7 amp constant, 10 amp iurcje capaci gt Fully regulated. 104tnp constan 13 amp surge, electronic nvdrioad protection w irstant aulo reset f Jity rtgnirti i 5 amp s-urge capaol 13 ft ViX 20 .imp tcns-lan wjih mir Hegu ated i 5 DC .L. t 7 a np surge stant auto...

Kenwood Ulsa Corporation

CA90810 P.O. Box 22745, Long Beach. CA 90801-5745 25 watts high 5 watts adjustable low Programmable scanning-memory, band, or mode scan wilh COM channel and priority alert 10 memory channels for frequency, mode. CTCSS tone, offset. Two chan nets for odd splits. All mode squelch, noise blanker and RIT Easy-to-read analog S amp RF meter MC-48 16-key DTMF hand microphone and microphone hook included Frequency lock, offset, reverse switches Digital Channel Link DCf_...

Oh

Figure 3. tiornhlower Si final Flow Diagram. Hornblower's DTMF 1-16 decoder module use three integrated circuit an SS1202 DTMF decoder, a CD4001 Strobe Enable circuit and a CD4514 one-of-iixteen demultiplexer, See Figures 4 and 12- Radio receivers, telephone lines, and photo-optical systems can supply the audio frequency signals containing DTMF information DTMF receiver, UlQh uses a 3.57 MHz color-bursi crystal to provide a stable reference clock signal for lOTs decoding and logic timing...