Convert Your Thdxx

Hy-Gain hasnTt forgotten about the thousands of proud TH6DXX owners, A conversion kit is available which offers all of the broadband advantages of the TH7DX and includes a complete stainless steel hardware package. It's easy to assemble, and when compieted, you have the finesttribandantennaon the market, theTH7DX, Hy-Gain s SN-86 baFun and exclusive Beia Match Tor dc yround are included The stainless stuet hardware, rugged phasing lines and preformed lead strripg penml Oiisy assembly and...

Capacitors

T 5uF 25V 3 T 00 1 8uF 5V 00 23 uF 2SV 3 *1 00 1 ,t ** J S It 1 ' n d t 10 i lije npuT KCW -s J i 3Drrra naK fj' Juees i5*tf - iS a ji.js iK O i Tf- P (IM Turri Tnm P0l t SO Ceramic IF Filters M m Ceramtc iitt rs 7 H 0 W iSSkhiJi SOea iK O i Tf- P (IM Turri Tnm P0l t SO i 'acjuc 3 40 pl Glatit Polypf pyli> hr i 'acjuc 3 40 pl Glatit Polypf pyli> hr Small 1 -dtiameler W truck crystal mike cariritfge 1.75 1 ftu& c ' Orifmmc 10 ItK 1 o ol fitiqtci i-K . ,1 rrti Hri 1 lloo pc. fi . 500pc uk...

Innovators In Digital Communication

The active, or tuned, amplifying audio filter uses RC networks in conjunction with solid-state amplifiers to synthes ze the inductor characteristics The simulated inductance is resonated with a capacitor to produce a tuned-filter effect. What makes this kind of tiller so popular with hams is that the filter can be constructed with variable Q and variable center and cutoff frequencies this allows convenient frontpanel control of the filter s operating characteristics that...

Lnr Downconverter For Satellite Communications

The new Model DC4-E1 is a high-performance, low-profile rf to i-f converter especially designed for small terminal satellite Earth stations. Available in single thread and redundant configurations, this unit offers low phase noise and good frequency stability for digital and voice carriers, such as QPSK and FM-SCPC. The DC4-E1 is compact, measuring only 1 -3 4 in height, and is designed for 19 rack mounting. Interfaces are coax connectors, so that the signal may be carried on low-cost coaxial...

Byl

An outboard active audio filter can yield surprising performance benefits in conjunction with even the most expensive receiving equipment Assuming such a filter is used with a receiver or transceiver having reasonably good i-f selectivity with good skirts, weak and QRM-plagued 556 signals can be made to jump out of the noise'' in many cases And in the sharpest modes, several CW s gna s may be copied within the set s pass band and tuned in separately. Aute c filter shown here is based on a...

Wacom

World's largest distributor of radio scanners, cefebrates 1982 with big savings on Bearcat scanners. Electra Company, the manufacturers of Bearcat scanners is offering consumer rebates on their great line of scanners, when purchased between February 1 and March 15, 1982. With your scanner, you can monitor the exciting two-way radio conversations of police and fire departments, intelligence agencies, mobile telephones, energy oil exploration crews, and more. Some scanners can even monitor...

Cevtep Limc

With cable-wrapping technique Be sure to wear gloves when working with the hardware cloth. Once all the screen is in place, eight flathead screws are used to hold it on each rib. The staples are no longer needed and can be removed.) Since eight layers of hardware cloth overlap at the center, they must be trimmed and then securely fastened beneath a seven-inch diameter disc. At this stage, all the essential parts ot the reflector are c omplete. Since my dish is going to be mounted in an exposed...

Info

Fig, 70+ Schema tic of decoder board B. Option 1 moves LDR 9 from column 4 row 4 center) to column 4 row 7(bottom centerI Change CS pins 1, 2, and 3 as shown, and load LDR at bottom center . light is falling on all the LDRs< I his will be a final check that all is working, before the mechanical assembly The row decoder 1C2 does the same ob as the column divider (IC1) but at a slower rate, to handle horizontal rows Therefore, it advances one position after each 32 horizontal lines. This...

Video Stabilizer

VIDEO STABILIZER, MFJ 1400, Copyguarded tapes cause picture rail arid jitter thai prevents vtewing and duplicating prerecorded tapes The MFJ Video Stabilizer removes copyguard so you can play copyguarded tapes on any TV set and duplicate any prerecorded tapes. Simply adjust Lock Control tor stable picture inches. VIPEOjAUDtO DISTRIBUTION AMPLIFIER SWITCHER, MFJ-1410. Lets you tape A copies at one time that are as good as the original. Amplifiers supply video and audio power boost that...

Juniata Valley

In March, the Juniata Valley Amateur Radio Club (JVARC) will be celebrating its 25th year as a bona fide club. In honor of the event, they will be operating a special event station. The club station is K3DNA, located in Lewistown PA (Mifflin county). Having started operation in January, their heavy operation is scheduled for the month of this cem pica te is awarded ttt moGNtrm of superior opera rm skiu AND NOBLE mtSATtWl TO THE HIGHEST PRINCfPtES OF am A TEUR RADIO. THE RECIPIENT HAS BfMWSTRA...

Ic Sale

2 05HC 1405A 1.00 74LS27 25 P3101 82525 74S289 1.00 SCL4013A BE .25 MC14001BCP .25 MC14017BCP .75 MC14012BCP .19 MC14023BCP .20 MC14027BCP .39 MC14069BCP .39 MC14093BCP .60 MCM10152L 5.00 MC7408P .19 74LS05PC .20 AD580 1+00 STOIB .60 CH164A .25 CG338V .25 74LS20F .20 746SN .39 DS0026CH 1,00 CD 4013BCN .30 CD 4028AE .49 CD4040BCN 80 CD 4069CN 74C74 ,30 MM74C74N .40 Check, money order, or credit cards welcome. (Master Charge and VISA only.) No personai checKs or certified persona* checks ior...

Ten Tec Specials

5T 5 Argonaut HF XCVft . . . 525 Aiqosy HF XCVR . 560 Dolls HF XCVH . FEN 1 EC A et dUOJ-j& fl __ in Block at discount pnces_ MFJ PRODUCTS (Call for other MFJ items) 962 i 5KW TuriF. f mn swUch 199.95 949 B 300 wail deluxe luner 122.00 941 C 300 wan tuner swiich mtr 7B 42 940 300 wait lunrr twllch nitr 69 70 4B4 Grnndmas r mfcmorv ki-ynr 12 msg 121 72 402 4 mstf Mt-mory kever t B7 96 422 PflCMoitoi Keytif w Bunctior BV1 87.15 408 Deluxe Kever wiih speed mir . 59.69 7520 Dn l iLJ naMfl filler...

Telex Headsetsheadphones

C1210 C1320 Keadphonps 22-95 32 95 PflOCOM 200 Headset dual Imo MlC 77 50 PROCOM 300 rt Wt headsei dual Imp. mic. 69 95 CABLE RGBU Foam 95 Sh ld 26o H S wire Rotor 2 1ft, 6 *22 iac.fi KLM ANTENNAS (other antennas in stock KT34A 4-Elimeni Tnband Beam 320 75 KT34XA -Element Trfband Beam 469 50 1 44-1JS 1 3LB 2m 1 3-t emenT wilh bai jn 7 7 144-148 16C 2m 16-Eleme< it for oscar 93.55 420 450-4 420-450 MHz 14- ii r-eni beam 420--50 1BC42D-450MH11 B-elemeni oscat 58 0 432 16LB16 elem 4 30*434 MHz...

MODEL

B & W's Broad Band Folded Dipole covers all amateur bands including the new 12, 17, and 30 meter bands. Also covers CAP frequencies, MARS, Military or any frequency from 3-5 -30 MHz Being used throughout the world Total length only 90 feet long- spreader spacing 19 inches. SWR less than 2 1 from 3.5-30 MHz. Rugged construction for long life. Can be installed as a flat top-inverted hV or sloper. Also available for 2 22 MHz, Power handling capability 2 KW-4 KW PER Supplied completely assembled...

Gem Quad Products

Transcona, Manitoba, Canada R2C 215 Box 53 Telephone (204) 846-333 Send and receive CW with MFJ's new CW transceive program and interface. Just plug-in interface, load program and operate. Gives you Tri-Split screen, 3295 character buffer, All you need to send and receive CW. TRS-80 Models I and III CW Transceive progran and interface lets yon send and receive CW. Nn modilications to rig or computer Trfi-Split screen tor receive, transmit, message index. On screen transrnitfreceive lEQs'rH...

Interference Handbook

Whether the alphabet soup nomenclature is TVI, RFlt or EMI, interference is a constant threat to the radio amateur, lurking in the shadows, waiting to turn docile neighbors into a horde of angry enemies. Even though the war against interfere ence has just begun, there is hope for the ham-radio army. Radio Publications' new book. Interference Handbook, is destined to become a bible for the tactics minded foot soldier. The author of Interference Handbook knows what he is talking about William...

New Tower Trailer

For those special situations that require communications tower mobility, AlumaTower Co. introduces an all-steel trailer for transporting and erecting any Aluma Tower Co. aluminum or steel tower Ideal for Field Day, civil defense, remote signal testing and many other situations, the tower trailer combination is easily towed. Once in place, the tower is tilted up and cranked Into position. The trailer acts as a secure base. For more information, contact Aluma Tower Co., 1639 Old Dixie Highway Box...

Uuw

Width c is found by solving f dVT6c Punching the calculator keys, we come up with the answer x 0.625 meters. Fig. 1 also shows that the total width of the dish, c, is found with the equation f dV16c. That's alt there is to designing the reflective part of the dish Now let's look at how to build it. For starters, you should be prepared to work with metric measurements of length. I found that the use of meters and centimeters helps to ensure accurate results For...

J

Conrtect ons between v o and Fun-M tfer. antenna input With the vfo on and warmed up, slowly spread or compress the last few turns of L1 until the vfo signal is heard in the receiver, This adjustment should be done with the tuning potentiometer R7 fully counterclockwise, Finally, verify that the vfo covers approximately 70 kHz if built for 40 meters and 50 kHz if built for 80. That's all there is to the adjustment. To operate the vfo, two connections need to be made one to the...

Ws

426 West Taft Avenue, Orange, California 92667 800 854-0547 California 714 998-3021 Mark Oman WAWBR 528 Deines Court Ft Collins CO 60525 a simple, goof-proof vfo for your QRP transmitter Note A complete Kit of parts, including PC board, is available from RADJOK1T. Box 411S. Greenville NH 03048 ior 34,95 plus 2,50 shipping and handling, The f-urvMitter February, 1981, 73 and Fun-Ceiver July. 1981, 73 provided the home-brew-oriented amateur with the basic components for a homebrew station setup...

Ham H

1 am in need of a schematic or instruction manual for a MARC muttiband radio receiver. I will pay copying and mailing expenses. Scognamigfio Vincenzo Piazza Trieste e Trento, 17 0046 S. Giorgio A Cremano 1 am in need of information on the Galaxy V MK3. conversion details for an Aerotron transceiver, and information on interfacing a TRS-80 to a Model 15 printer via an M-BO interface. Tom Van Schuyler WA2LOJ 57 Needle lane Levitt own NY 11756 I am in need of manuals for a Gonset 3136, an Ameco...

Plessey Avantek Plessey

SLI61 RF AmpHfter 3, 05 SL amp 23 5L1 amp H RF Amplifier 3.05 SL1624 SL1612 AF Amplifier 3 05 SL1625 SLl amp n Limiting Amp 4, 3B SL1626 SL1621 ACC Cen 4.07 SL1630 5L1 amp 22 AF AmpVOG 3,72 SL T 831 PLESSEY INTEGRATED CIRCUITS AM Oet ACC Amp Multimode Det AM Det ACC Amp VOCAD Sidetune AF Amp AF Amp TT SL GM Double Bal Mod 4-07 G. 1 7 SL 1C41 Receiver1 Mixer 4.07 4.07 SL1G amp Q Xtal Maint Ckt 5.45 3.72 SL6G 0 IF Amp Det 6.78 SL6640 FM Rtvr VJ Amp 4. 41 4.07 5L6 5Q FM Rcyr Vi 0 A 3. 39 SL 90...

Mfj Keyers

Curtis 8044 Keyer

Iambic operation, dot-dash memories, weight control, solid state keying. RF proof. The NtFJ 408 Delude Electronic Keyer sends iambic automatic, semi-automatic manual Use squeeze, single lever or straight key Speedmeler tots you read speed fro 100 WPM Socket tor external Curtis memory, fandom code generator, -leyboam Optional cable. S4 95, iambic operation will squeeze Dot Jasft insertion Semi-automatic bug operation Dro-vides automatic dots and manual dashes. Dot-dash...

Kdk Fma Two Meter Fm Transceiver

When you think about two-meter transceivers, what brand names come to mind first Chances are, you'll name one of the big full line imported labels, There is nothing wrong with this except that you may be overlooking some of the other guys. What about firms like Azden and KDK 8oth concentrate on selling a specific but high-quality line of radios. Until recently, I dismissed firms like these as uaiso-rans.,T Then I had a chance to review KDK's new FM 2025A two-meter FM transceiver. Now Tm a firm...

Mfj Econo Keyer Ii

Ten Tec Keyers

The MFJ-401 and MFJ-405 Econo Keyer II from MFJ Enterprises is a new full-feature economy keyer using the Curtis 8044 IC for reliability. The MFJ-401 405 Econo Keyer l has a much easier to use design and layout than the old Econo Keyer line. All controls are located on the front panel where they are easy to find and use. The MFJ-401 405 Econo Keyer II has front-panel controls for both speed and volume. The on off switch and auto semiauto switch is on the front panel. This switch lets you use...

Special Offer

Chart of UNITED STATES AMATEUR RADIO PRIVILEGES by el of Ucense. emi Ion type, and frequency from 160 thru 2 meters. Lociudiii provision For the new 30, 17. and 13 meter buds. ThJa 22 Jt 29 In. twelve-color chart la U e flrat of Its kind to be both Informative and decorative. S3.00 vaJae. oftly 81.03 with the pur-chaoe of 1 or more boofca from the Radio Book- hop, Supplies limited order now. CHfaooSi.dfl. THE MAGIC OF HAM RA0IO by Jerrold Swank W amp HXR begins with a brief histoiy of amateur...

Og Soo So

Aoo, c 400.00 100.00 2M.OO ISO.00 800 00 400.00 500.00 1500.00 1 BOO.DO 500.00 500.00 400.00 500.00 400,00 bOO.OO 400.00 500.00 2000.00 2500.DO 1000,00 LOOO.OO 1000.00 100.00 200,00 3W.00 7 , 00 1000.00 100,00 I5 0 00 IOOO.OO 7000.00 9000.00 SO.00 ha rda Ma rda ha rda l a rda Nirti Ha rda Harta Ha rda na nie arda Ha n a Nartt Harot lurda Na rda Si rda Hortaf PflD PltO PHD