Departments

10 Probing Auto Electronics W6WTU Help your neighbor identity his car's problem and be an electronic's heroI 14 Announcing the QRPeanut N5GZH Here's a compact QRP transmatch you can build for next to nothing. 17 Keys to Better Operating W6BNB Put some personality back into your CW. 31 Low-Voitage Detector - W6WTU 32 George's XE-lent Adventure - WB2AQC

Circle On Reader Service Card

Sounder was rejected in this application even though the circuit is capable of driving a Sonalert or similar sounder. An LM741 op amp was chosen to be used as the detector because of its availability and low cost, not Tor any specific technical reason. Yes. a voltage comparator, which was designed for the purpose, would work equaily as well in this application. As a matter of fact, if you decided to use a voltage comparator, there would be no changes to the circuit cxcept for the device pin...

Receive

Sensitivity > 1 2 jtVfor 10 dB S N IF selectivity 2.1 kHz 6dB 3.6 kHz 60 dB AGC (last attack, slow release in high noise) *RF gain control Noise blanker ACCESSORIES MS-3 Matching speaker RV-3 Remote VFO (XMIT RX or split operation) AC-3 Power supply (120 VAC) DC-3 Power supply (12 VDC) Progressing from the TR-3 into the TR-4 series, the earlv TR-4 tratiseeh-er had a rR-3-st le main tuning knob tkH markings on the VFO knob skirl). The 9 MHz sideband filters used in early TR-4s are four poles...

Qsp

Handy reference to rite most commonly used codes* Table 3. Handy reference to rite most commonly used codes* When followed by a question mark, any Q-signal asks a question. For exam pie, QRG means, ''What is my (or your) frequency QRZ means, By whom am I being called While there may be amateurs who discourage the use of Q-signals with radiotelephone communications, some Q-signals fit in very nicely w ith such operating. As examples, QRM, QRN, QRR QRX. 22 73 Amateur Radio Today December...

Electronic Bug Emulator

Put some personality back into your CW. J. Frank Brumbaugh W4LJD RO, Box 30 c o Defendini Salinas PR 00751-0030 How mam of us initially succumbed to the lure of an electronic ke er and sold our bugs, onlv to become dissatisfied at the lack of personality in our CW Or made keying emirs with the new gadgets and wished we had our old bugs back Yes, you and me and lots of others. With this article. I hope to take many of us forward to the past. New standard Vibroplex bugs cost 160 and the price...

Wwv Receiver

Buy at low, factory-direct net prices arid save For complete info, call or write for complete catalog. Order by mail, fax, email, Or phone 9-12, 1-5 eastern timeJH Min. 6 S& H charge for T lb. plus add'* weight & insurance. Use Visa, MC, Discover, check, or UPS C.O.D. See SPECIAL OFFERS and view complete catalog on our web site 65-D Moul Rd Hilton NY 14468-9535 Phone 716-392-9430 (fax -9420) Output levels from 10Wto 100W Starting at 99 XCITERS 2W output, continuous duty. TA51 for 6M, 2M....

Probing Auto Electronics

Help your neighbor identify his car s problem and be an electronics hero Hugh Wells W6WTU 1411 18th Street Manhattan Beach CA 90266-4025 Being a ham, you're expected to know everything about electronics regardless of the application. So have you ever had some neighbors drop over and indicate thai they needed your help with their car Chances are, they've indicated thai it won't start or runs poorly, or that the battery is dead. in most eases, the symptoms described seldom lit the actual...

Info

Falls Church VA 22041-0099 carrjj aoS.com Hyhrkl couplers are an meres Ling d uss of de i ees. The nu st interesting probity is thai the will split Lin input power two ways, Each of these outputs receives -3 dB of the input power i.e., a two-way split . Some hybrids produce in-phase outputs. others called quadrature hybrids produce W-degree outputs, and others produce ISO-degree out of phase outputs. There arc a number of devices that are useful, hut among those that I find most interesting are...

Ariss

Manned-space ham activities will experience a quantum leap PitotaC SEDSAT-1 is under construction in Huntsville. Alabama. PitotaC SEDSAT-1 is under construction in Huntsville. Alabama. with the full implementation ot ARISS, or Amateur Radio on the International Space Station. While the advances of voice and packet operations on U AJ have pro ed to be incredibly valuable for educational and recreational acti iiie . the will be viewed as onh .i step on the path to a rather significant,...

Akj

The Mapbook MapBook contains locations of hundreds upon hundreds of open repealers throughout the U.S., Canada and Mexico. These detailed maps show all highways and major cities in each state. If you travel anywhere in the United States, this Mapbook will be the best investment you ever made A true cornucopia of technical information for ham radio. Not only will you find the theoretical aspects, you will find real practical information presented in a no nonsense...

Call

Amateur Radio Cellular Laptop Computer Alarms Bob Shrader W6BNB 1911 Barnett Valley Road Sebastopol CA 95472 w6bnb aoLcom I here is a proper way of operating radio transmitters on the air to produce the most efficient and interesting communications- The basic rules arc reasonably simple. They arc things with which you will probably agree if they are considered a bit. The undesirable operating items discussed here have all been heard recently on the ham hands. Let's not be the ones who operate...

Its and Dahs

The K2659 Morse Decoder Kit from Veil em an Electronics Marshall G. Emm N1FN 2460 S. Moiine Way Aurora CO 80014 Mfn Morse Xrcom As one whose ham activities are 95 HF CW, I have long held the view that When it comes to copying code, the human ear will heat a computer every time. An experienced CW operator can copy code that is barely audible, signals plagued with QRM QRN, and QSBt Computers need a good solid signal with a high signal-to-noise ratio. And when conditions are good enough for...

F

12 Functions Freq to 4MHz induetanc Capacitance 11 r fVrli5il6 - 111 lii i. hi.- , IQ 0MHz. ITF-P 1U ilir, F L L-1 M fi . Repair Syetern S dering and Dcsold'iri-g Staii r M jai .BL-gie Top 'tc-l it rU Liii iyiK m gt U lidndlq r l. Bering r.Tip rnl ric . n ra cL sodt n y lui gt Mf le. llSOC 42 gt C gt , l f i li-ie r nrjr -1 g-F -XI yfiOT plOC M J gt C 1 Tili iv i 1 is t ftflO F Indple r nr Ul n nh irilirvi ni itm nncmr iriVi' Lu FC iK i'il tt-Wl - PesimxnT VHlH h Mil- CiJIJ 3mlh7 iKfl T...

Rf Parts

435 SOUTH PACIFIC STREET SAN MARCOS, CA 92069 tighten each terminal strip, If rivets are encountered, you can drill them out and replace them with mils and bolts, when necessary. C ases and hardware can be cleaned using automotive materials such as waxes and buffers. Front panels are another story. If there is significant damage or wear to the front panel, you may have to hire the work out. In many cases ii is nearly impossible for an individual to do the work and get it to look like new. With...

Transmitter Location

New fixed site direction I I tinders provide 2 degree Lr J software tor triangulation from T a central control site. Mobile I versions also available covering I PO Bo 2780 Carefree, AZ 85377 L Telf 602 4SS-9755 jfax 602 488-1295 I European Marketing Director Denis Egan I PO Box 2. Seaton, Devon EX12 2YS England Tel amp Fax 44 1297 62 56 90 to expect and how you know il something is in working condi tion. I know we need a set ol tesi parameters through which to put a device to avoid the purchase...