Lentini Communications

21 GARFIELD STREET, NEWtNGTON, CT 06111 as a CW iiIter, R1T, and a fine-tune control make for a very well-designed QRP rig. The ARK-4 is only available for the 40 meter band, Full QSK, again with a rather loud relay, controls 5 watts of RF. Frequency control is also by push-buttons, but with a fine-tune control for small changes in frequency. You have the same set it and be there'4 frequency control as the ARK-40. And, like the ARK-40. the manual for the ARK-4 is great. There arc plenty of...

Circle On Reader Service Card

73 Amateur Radio Today October, 1994 23 The A& A Engineering 20 Meter QRP Rig Telephone (714)952-2114 Easy to build and simple to operate. p S siS If you've been looking for a small monoband QRP transceiver, the current market has quite a bit to offer. Your search may come to an end if you lake a closer look at A& A Engineering's fig. This CW-only QRP transmitter was designed by Gary Breed K9AV and appeared in the December 1990 and January 1991 issues of QST Gary designed the rig to be...

Ok

IE you do not have a signal source like a grid-dip oscipator, signal generator, or ham transmitter, you can listen to the phone signals up at the top of the MO meter hand and gel close. The adjustment oi i 2. the antenna coil, is very broad so do not expect much of a peak. Thi adjustment is best made listening to a weak signal Now you are ready to sit back and enjoy your receiver My t raveler has very good sensitivity. Signals of less than one microvolt ire readable. Selectivity is about 2.5 to...

Rlc Port Controller

Whether you're an experienced packeieer or a newcomer warning to explore packet for the first lime, this is what yoif ve been wailing fori Thanks to a breakthrough in digital signal processing, we have developed n tiny, full-featured, packet modem at an unprecedented low price. The Bay Pat Model BP-1 t rani forms your PC-compatible computer into a powerful Packet TNCt capable, of supporting sophisticated features like digipeaiing, file transfers, and remote terminal access. NOW is the time for...

Info

As you can see, the system impedance suddenly went quite high, and that's one reason why I went with a half-wave line in the article Earlier i mentioned a balun. The reason you need one is o keep the feedline from radiating, and so you don't distort the radiation pattern. The latter may not be so important, but only the antenna should radiate and nothing else. On the higher bands, it doesn't take much coa* to make a half-wave 27.8 ft. at 14 MHz) fine and if you wind half ol it. more, into a 6'...

Tripp Lite

The MasterTouch under-monitor surge suppressor from Tripp Lite offers features not found on any other console-style surge suppressor at any price The unit features special diagnostic circuitry to warn of potentiai power problems before the equipment is turned on. Color indicators display power protection status plus wiring integrity of the outlet source. An exclusive brownout Indicalor signals the presence of dangerous low vollages thai can damage equipment, allowing the user to power-down...

Mhz Receiver

R-1283 GRC RECEIVER covers VHF in bands 30-90and9G-3Q0MHzAM-FM-CW-Pulse continuously tunable 21.4 MHz IF. Selectable bandwidths 67 or 300 KHz and 3 MHz Solidstate witfi tuning and level meters. BF0 AGC. video output and H connections. Requires 115 V 60 Hz 3,5x19x17, 30 fos shT 145.00 COLLINS 30S1 POWER AMPt1 KW PEP manual Iv tuned for KWM-2A Uses 4CX1 OOOA 8168 tube tnot included) Winged' label 200Ibssh Used-not tested 5900.00 Prices F B. Lira, 0 - VISA. MASTERCARD AcrtpteJ Allow lor Shipping -...

Oct

HUNTIINGTQN, IN The Huntington County ARS wifl sponsor its 6th annual Hamfest from 8 AM-1 PM at the PAL Police Athletic League Club. Set-up at 6 AM, VE Exams. Flea Market, Talk-in on 146.0S5 .685 and 443.975 443.975. Contact Chris Richardson N9QVI PO Box 284 Huntington tN 46750. Tef 219 3560319. QUEENS, NY The Hall of Science arc Hamfear wiJI be held at the New York Hall ot Science parking lot - Rushing Meadow Park, 47 01 11 Tth St. Setup at 7 30 AM, Doors open at 9 AM. Taik-in on 444,200...

Iua Uhf Fm

Elastomer Construction - This special material provide a comfortable, positive grip. The compact design fiis ihe natural cune of your fingers and hand - especially welcome during long operating times, Buiklit Keypad - Vmpli- spacing between keys for positive, emir free operation. r e Display - indicates 1 different functions, battery capacity and subband frequency. Dual 8a'id Receive Capability - Permits reception o another hand Lt 440 MHz on the IC-T21A - Ftiil Crossbond Duplex Operation-...

Ci

LI, L3 9.126 F MHz p H L2 15-72 yF MHz p K L4, L5 5.BQ3 F MHz m H C1k C2 4365 F MH pF C3 gt C5 2776 F MHz pF C4 1662 F MHi pF Figure 3. FCB pattern and parts overlap Figure 3. FCB pattern and parts overlap Figure 4. AM BCB version of the filter cates. reviewers are supposed to maintain their lough image' by castigating the ancestry ol authors or tearing down their ego or somehow vilifying their work. Bui that woutd be the jealousy of a feliow author speaking, rioi my actual judgement, realty...

Arrlbooks

Fei-luicsr JJcJ DSP. irFqvu gt td treatment of fl jikJ Pi-L -ill new jlF-Jmul-k k, plus lut inure. Ht AR1S93 ARRL Handbook lt chajucrv featuring Ml if I lahfes. figure nd churl . Caniprctonuvc. vd3 firpmrnl mJ AtTurdatilc S25.WJ AmoSe-4 ARRL Oppfaling Manual 4th Ed. tj'ii-iiairutHm cm hitia b nuke he be-.i uv at pui ja- IKIn iTK LxJirt idifffAfr hwtfc ampule QSCAJL VMM jflKSlAM AflOTSc Antenna Compendium Vol, 1 Matmh o ttruak, reduced t utfrr -. hjlurt...

Hw

Schematic diagram for the QSK Module What is DSP DSP allows the construction of various filters of greal complexity by using computer code. This allows us to have easy access to a variety of filters, each perfectly optimized for whatever mode we are operating The DSP II has been designed to operate in TO different modes Four fitters are optimized for reducing interference to SSB phone signals from CW, heterodynes and random noise interference, ire fil Four more fillers operate as...

Lc Meter

Measure inductors Iron-, 10 uH l0mH and capaoiore Irom 2 pF-2uF wrth high accuracy Sy cooneci-ng the LC-1 to ar gt y digital multimeter. Two pushbutton ranges for hrgh resolution readings and we even grve you calibration components to assure proper accuracy of your krll Active filters and switching supplies require critical values, no one should be withoul an accurate i.C meler. For a pro look, add our matching case ei LC-1 LC meter CLC cose Bun you own Stereo FV rad gt o st amp vort Tmsnte a...

Rf-clipper Mc1350

MFJ's new QRP SSB station for 20 meters. MFJ Enterprises, Inc. P.O. Box 494 Mississippi State MS 39762 Telephone 601 323-5869 Orders 800 647-1800 Fax 601 323-6551 Price Class 220 rhat good is a 20 meter SSB QRP transceiver I kept mulling this over En my mind as I unwrapped the newly-arrived MFJ-9420. After allT all my previous experience on 20 meters was based on my activities as a serious DXer I rarely ventured onto this band unless the trusty 2 kW linear was online and ready for battle....

Hfacom

Ionospheric performance in that there is minimum Doppier effect In a radio path using ground waves or sky waves. As we covered last month in LORAIM operation at 100 kHz, the ground wave is dominant. Signals are reasonably strong and the calibration is about as good as it gets. Accuracies to 0,001 hertz are commonplace and, with longer time sampling, 0.0001 hertz is possibfe using older surplus equipment Now, this kind of accuracy puts to shame the HP-5245 only because it can't resolve enough...

The Traveler

Here is a simple, high-performance. 80 meter SSB receiver designed around the Motorola MC3335P 1C chip. It is a true single-sideband superheirodyne, with a three-pole crystal filter and crystal-controlled BFO, using inexpensive microprocessor crystals. The cost is comparable no more ihan S8 to S10 over the cost of an gt of the popular direct conversion receivers using the NE602 LM386 combinations. Arrangements have been made with Dan Small Parts Co. lt 1 35 South 3rd Wesi 1 Missoula MT 59801...

Ncg Company

800 962-2611 714 630-4541 Fax 714 630-7024 Michael Bryce WB8VGE 2225 Mayflower NW Massitlon OH 4 J646 Several months ago, i described a Small QSK module for Ihe Howes transceiver. This circuit worked so welt that i decided to use it in another rig. However J did -ot want to build another ore on perfboard. That method is tire if you only need ore or iwo copies. So, this month, here is Ihe PC board and overlay for the QSK module. Several items have been changed smce the arcuil came qui First,...

Pennsylvania

Authorized factory sales and service. KENWOOD, IC0Mh YAESU featuring AMER-ITHON, B amp W. MFJ, HYGAiN, KLM, CUSHCRAFT, HUSTLER, KANTRONiCS, AEA VIBROPLEX. HEiL CALLBOOK, ARRL Publications, and much more HAMTRONICS. INC,t 4033 Brownsville Road. Trevose PA 19047. 215 357-1400. FAX 215 355-0950. Sales Order 1-800-426-2B20. Circle Reader Service 298 for more information Dealers Your company name and message can contain up 10 50 words tor as tattle as 420 yearly prepaid , or 210 toi moor -ETiparii...

Circle S On Reader Sep Vice Card

73 Amateur Radio Todayt 70 Route 202 North, Peterborough, NH 03458 If your product or service is of interest to radio amateurs,spread the word For instant classified ad orders call Judy Walker Information 603 924-0058 Fax 603 924-9327 RATES Individual private for sale or wanted S-35 per word Commercial for prom for sate S1.00 per word First and last name 1 word . Slreet 1 word . City 1 word . State and Zip 1 word Please make checks payable to 73 Amatuer Radio Today

Nog Comet

T he new Power Pocket from NCG Comet is a convenient, compacl slim design Yuasa battery providing a dependable 2 Ah of 12V power. The lightweight 30 oz. Power Pockei s enclosed in a comfortable soft case which can be worn on a belt or with thfc included shoulder si rap hip belt. A standard cigarette lighter adapter plug inserts into the fused adapter socket, providing hours of extended operation. The sealed-case lead-acid battery can be topped-off without the memory effects of NiCds. A tio VAC...