Info

ST6S 00 1224 00 4000 S 00 S 07 00 1202 00 S 74 00 S GO.00 5 33 00 S 00 Vi New 2m Vertical J 33 50 TH3JR 3 Element Triband Beam Si33 00 TH3MK3 3 Element Tnbarid Beam Si 75 00 THSOX New S Element Triband Beam SI95 00 TH6DXX 6 Element Tribano Beam SZ35 00 105BA 5 element 10m Long John 95 00 15SBA 5 Element 15m Long John'1 145 00 2 5BA S Element 20m Long John _________ 5235 00 HAVQ 4 Band VerlfCaf I0-40m S 48 00 1B VT s Band tO-SOm Trap Venial S 76 00 . complete line antennas only o sale - CO HAM W...

In Stock

A irau loaded antenna mat performs hke a monobandiiH Thais ihp characteristic of thib ii* elnitiit ihfee baruj beam Through the usu of .vjde spacing and inteiiaung of elements, he follow tny Ei possibJ*. three actn* elements 20 three active elements on 15 and four active elements on 10 meters. No need to run separate coax feed lines for each band, as the bandswiiching is automatically made via the H gh-G iJjP son irjps. Despyned to handle the maximum Je ul puwei iht t aps jre Lapped at each end...

The Robot Specialty Mode Terminal

If you have been shopping around for RTTY equipment, you probably have asked yourself How can I get high performance, multiple-mode capabilities without spending a fortune Robot Research has answered this question through the use of microprocessor technology. The Model 800 is the most complete specialty mode terminal ever offered for under 1000 yet it has features and performance capabilities which put it in the class of systems costing twice this amount or more All that's needed to have a...

Va

I Wiring diagram fur modified diode matrix. RA and values are not critical however, a large deviation will cause erratic operation. Rc prevents truncated characters should other keys he struck while the space bar is down. Resistors *AW diodes 1N914 1N4148 capacitors 0.1 disc. Considering operational features versus IC count, cost, and ease of construction, the Morse keyboard designed by Crom WB9WRE is one of the best keyboard bargains available (73 Magazine, February, 1979, p. 84). The...

Dons Corner

Our service men note the new rigs coming out, arjd they are plentiful. Seem to be almosi fjilure proof the first leap out of the factory, The design is better. Quality-c ontrol seems to preclude the old warning wait until a few get out before purchasing plus, the dealers seem to be getting better service info feedback From the factory, faster than ever. Word of AcfVice Buy from a dealer that is AUTHORIZED or can guarantiee you loca service. Don't get stuck with a unit that must be factory...

U

3 8-2* thflead (to match standard mobile antenna mounting 0allj A. On a car, the metal body is used as the ground plane n place of radials. In addition, this sort of antenna system is from 2 to 15 efficient. The physical limitations of a car make us accept this loss, but you can do much better at home. Q. Speaking of cars, still have a standard mobile mounting ball on my car that I used to use for my CB antenna. Can I use it for a 2-meter FM rig A. You will have some loss and you will probably...

L

Maximum legal power on 160-15 meters The TL-922A linear amplifier provides maximum legal power on the 160-15 meter Amateur bands. 2000 W PEP (SSB) 1000 W DC (CW, RTTY) input power on 160, 80, 40, 20, and 15 meters., with 80 W drive. Excellent IMD characteristics. Pair of EIMAC 3-500Z high- Blower with automatic turnoff-delay circuit. Variable threshold level type ALC, Two meters, one indicating plate current, and the other indicating grid current, relative Rh output, and high voltage. Dip meter...

International Crystal Mfc Co

Iambic operation, dot-dash memories, weight control, solid state keying. RF proof. The MFJ-408 Deluxe Electronic Keyer sends iambic, automatic, semi-automatic, manual Use squeeze, single lever or straight Key. Speedmeter Jets you read speed to 100 WPM Socket lor external Curtis memory, random code generator, keyboard. Gpiional cable, 4 95 Iambic operation with squeeze key. Dot dash insertion. Semi-automatic bug operation pro vides automatic dots and manual dashes. DoMash...

Signal

Desired frequency, can still convert an undesired image signal to baseband. Now you couid filter out the image on the front end, but you would have to make the filter track with the LO to remove all images as you tuned At these frequencies, a tracking filter is no easy beast to tame. So rather than wrestle with the problem, receiver designers such as Stanford professor Taylor Howard WbHD adopted the dual-conversion philosophy and proceeded to knock em dead with the first low-cost TVRG The...

Digital Freq Readout

Calibrate control compensates for heterodyne errors and mode offsets. The MFJ Dig Dial Adapter turns your frequency counter into an accurate digital frequency readout lor your transceiver. Connects between e iemat VF0 ack and frequency counter Counter gives direct frequency readout 10 right ol decimal for 7t 14, 21H 28 MHz bands. Mentally replace digits to left of dectma with MHz band as you do now with your analog dial. For the 3,5 and 28 S MHz band tgnore digits to left of decimal and...

Infotech Mc Trimode Keyboard

A microprocessor controlled Keyboard that generates Morse. RTTY amp ASCII. 4 to 125 W.P.M. in 1 W.RM. increments sidetone with tone and ievef adjustments special keys AS. BK. BT. AR SK, CO, DE 2 shifts 170 amp 850 hz Built in quick brown for generator on all modes 700 Character Running Buffer 10 recallable, user programmable message memories of 120 characters each CQ amp DE special keys on all modes Keyboard control of ail functions 4 row keyboard eliminates figures letters shifting on RTTY 30...

For The Home

Our recejver lets you gar over 75 channels of teie-vision directly from earth-orbiting cable TV satellites HBO, Showtime, super stations, sports and movies worldwide Full Membership - 38.00 U,S. Friend - Contribution of S__ 2184 J amp C BLVD. MAPLES, FLA. 33942 FULL MEMBERS-Receive 52 issues of the weekly Expedition Newsletter while making a significant contribution to the expedition Fund. 38.00 U,S, LIMITED MEMBERS - Receive 52 issues of the expedition Newsletter while not contributing to the...

Handi Con V

CAN NOW BE A COMPLETELY PORTABLE VHF-hi MONfTOR 2400 CHANNEL CAPABILITY DOUBLE BAND COVERAGE. paging amp more 159 163 Mhz maritime coastal, raifroads, N.O.A, weather amp more. MULTf-8AND amp MULT - CHANNELLED MONITORING WfTH SCANNING H,T s OFF RETURNS TO NORMAL TRANS

Circuit Mic Kenwood

Kenwood 7730

Thr GH-1 JS the complete luuiLd iad.ai kit iof the WV IA It cordis of I5D of 1 4 sttar.dedi atornmum .v re and structiom. The GR-l will m-ciease ihe efficiency of the GR 1 oy providing the correci Time was, if you had a small car and wanted to put a synthesized two-meter rig in it, you either cultivated a sadistic disregard for your passenger's knees or got yourself one of the two rigs on the market with a compact separate control head, The new Kenwood TR-7730 s part of a trend that will change...

Tentec

Low, firing the strobe which loads the FIFO. The work of the keyswitch is now complete, in the original version, the keyswitch provides a direct ground which retains the 8-bit code on the data buses and holds the strobe input low, preventing reset until the key is released. Conversely, there is no direct ground path in the modified version. The keyswitch discharges the capacitor, sending a negative-going pulse to form the 8-bit code and trigger the strobe. When the negative-going pulse is...

The Nelson Parabolic Tvro Antenna Manual

The Nelson Parabolic TVRO Antenna Manual S.F. Mitchell WA40SR and Richard Christian WA4CVP As the foreword in the Manual states, author Ethier has no formal microwave training, but he is an excellent student of obscure textbooks and an avid do-it-himselfer, . . r The Nelson Parabolic TVRO Antenna Manual starts with a general discussion of parabolic dish design and describes the relative advantages of a parabolic antenna over the spherical antenna. These advantages include the fact that the...

Rter

Receive 10-500 KHz on Ham rig or SWL receiver. Plug Ihis MFJ VLF Converter belween your antenna and Ham transceiver or SWL receiver and tune the VLF 10 500 KHz band. Hear weather, shi to shore CW traffic, RTTY, WWVES, navigation beacons, 1750 meter no license band, European broadcast, and more. MFJ 332 Ham version converts 10 500 KHz to 28.010 to 28.500 MHz Also adds standard broadcast band on 28.5 to 29.7 MHz. MFJ-331 SWL version converts to 4.010 to 4.500 MHz. Read frequency directly on your...

Memphis Amateur

Authorized Dealer for Kenwood, Yaesu, Icom, Deake, Mirage, AEA Info-Tech, Ten-Tec, MFJ, Cubic, and B amp M Write 1465 Wells Stat Rd., Memphis, Tn. 38108 M T i _ nn _t i 1 IV a 32 cnaracter alphanumeric vacuunufiu takes cw or tty audio from a receiver or tape ft across the screen, much like s the AEA mode Prices and specifications subject to change without notice or obligation It all began for Henry Radio in 1927. In 1981 we're still going strong. Now, more than ever before, we feel able to...

Haltronix

BOX 1101 SOUTHGATE, MICH. 48195 PHONE 313 285-1782 ance ts about 60 or 70 Ohms and you can use the old mount and coax feeder. You also can take an aluminum or steel rod, cut to about 20 inches, and thread the lower inch to match the thread in the ball Fig 4 . You now have a quarter-wave vertical again using the old ball mount and coax feeder. Q. As long as we are salvaging CB antennas, surely on 10 meters i can use the 27-MHz Loudengrabber V that I have mounted on my roof, A. You probably...

Rm

DAIWA ingenuity is also evident m the RM-940. an Infrared cordless mobile microphone system. Audio and transmit receive swrtching are carried on a safe mlrared beam Experience theIreedom of cordless mobile operation Ask you' Daiwa dealer for a demo today Microphone Elecfret Condenser type Continuous Operating Time 5 hours minimum Charging Time 8 hours max Usable Distance 3.5 feet microphone 0 sensor Power Requirements Controller - 13.S vdc w GO ma. Microphone 2 5 vdc ' 30 ma DAIWA innovative...

Portapeater Instant Repeater

Command trvd ron rol mod uff rnaN - m n rsni t fj peare from any tart'os with abftolulrly no modJIi cations so the r dioa vift thp inrl mir jacks Porterr or a personal ot lined rep al r Writs or r ai tor dflt irfpri data mnnuiii Wr accppi VISA and M R nuf il can tog i Individual CW IDs IK PROM m voy COR COR trigger Ad i fJ mtn 10 rvclp Tim r AtJj 0-15 min Timp Out tirr r Trj r paaler beacon or irisai mniies 250 voit swilching capabihiy Complete g m'lni HlHCP control Complets rpr iicfli manual...

OUT

Typical diode clamp circuit used in economy receivers vs. feedback clamping taken from voltage samples of the video signal during the sync pulse interval gt wise fine picture when tracking wide deviations. You see an annoying streaking effect in the video. Tweaking the bandwidth can help to cure this problem. Now if the PLL works pretty well at the 35-MH2 reduced i-f, you might wonder what would happen tf we divided again and again down to nearly dc Perhaps the only problem with that...

Rder

Ben C Butcher NbAVU 9541 Duke Drive Westminster CA 92683 n spinning the dial across the various amateur bands, it is not unusual lo find a QSO concerning radio equipment A fvptcal QSO might be as follows am running a Satellite JSb with a Pat ific Kilowatt 2 linear amplifier My antenna consists of stacked verticals, 33 elements, up about 100 feet I also have a Demosthenes speech processor It appears that there is much interest in the types of radios and accessories being used as well as the...