Money Back Guarantee

FOR OUR SUMMER BARGAIN CATAL0C OK Smicondutlon Poiy Pak* Peril TKHMS . Afli DOlUftr ftaird. nrt 30 tltyi, C IJI I' o WANTED Military, Commercial, SurplusAirborne, Ground, Transmitters, Receivers, Test sets, Accessories. Especially Collins. We pay freight and cash. Ritco Electronics, Box 156, Annandale, Virginia, phone 703-560-5480 collect. ALBERTA CENTENNIAL Amateur Radio Convention, Calgary, Alberta, Canada, July 8-9, Write to VE6NQ, Box 592, Calgary, Alberta, for full information. ST- LOUIS...

Mobile Or Fixed Station

Smallest of the High-Pow-erc< l Transceivers. (6xl0i4 Great for either Mobile or Fixed Station. No compromise in power, * Hottest Receiver of any Transceiver Special New Six-Crystal lattice filter. Complete SO-10 Meter Covern kc. 500 KG on all bands, with 1 Megacycle on 10 Meters, Both Upper and Lower Selective Sideband. Highest Stability. Drift less than 100 CY in any 15 minute j> erii)d after warmup. * The personal drift chart of every Galaxy that comes off our line goes with the unit to...

Info

This minibeam's performance and spacing is outlined in he super-beam was an attempt to improve performance on a bands, especially on 20 meters, and it certainly succeeded. It's detail is also found in Table 1 and this is the beam used for the constructional details to follow. To construct this antenna, a twin boom is used with the quarter-wave stubs made from 300 ohm twin-lead and inserted inside the boom, centrally locating them by use of corks or plastic inserts and...

Arcturus Electronics Co

J. 07087 That's righi. Get your FCC commercial operator's license, and then work, fit good pay, tn your hobby field radio and electronics. We prepare you by correspondence, under our f> qe your license or your money back v arranty. Get full details in our free FCC License Course Brochure1'* Write Grantham School of Electronics, Dept. R. 1505 N. Western Ave,, Hollywood, Calif. 90021

Am

A look at the W2USA Radio Club at the New York World's Fair. With Expo '67 in Full swing, it's an opportune time to look at amateur radio participation at a similar event nearly thirty years ago. The W2USA Radio Club, under Managing Director W2DKJ, actually started operations in 1938, months before the New York World's Fair opened its gates. At this time operation from llie fair grounds was limited to five meters with a 400 watt phone rig and National MO receiver donated to the cause by W2DKJ....

New Books

This new publication from RCA is the newest member of a growing family of RCA technical manuals. Although this manual is si anted toward the transistor design engineer, there is a lot of useful information for amateurs, students and electronic hobbyists, lie chapter on high-frequency amplifiers is well worth the price of the book more than 100 pages are devoted to this subject alone. 1 tliis chapter there are sections on designing rf power amplifiers, matching networks, mobile radio, SSB...

Herbert W Gordon Company

Tion for instance there are discussions of sensitivity measurements, selectivity measurements, image rejection, backlash, overload, J requency stability, noise measurements and audio fidelity and distortion. The 54-page appendix covers those measurements and instruments that don't fit into the context of the other chapters, as well as several mathematical tables. All in all, this is a very useful handbook for the amateur who wants to know how to better use his test equipment. 6,00 at your local...

Pot Mav Also Be Replaced With Variac

Mort Waters W2JDL 82 Boston Avenue Massapequa, L. K, N. Y. I 1758 Companion to the SB3G1 receiver reviewed here last month, the SB401 is, like its partner in receiving, a modified and improved version of an older piece of gear, in this case the SB400, an exciter which lust no time in establishing a good reputation. Frcqucncy coverage is from 10 to 80 meters in eight 500 kHz segments, four of which are required for the full spread from 28 to 30 MHz. The operator has a choice of upper or lower...

Authorized Waters Dealers

San Francisco, California HARRISON RADIO CORPORATION New York, New York STERLING ELECTRONIC SUPPLY New Orleans, Louisiana UNCLE GEORGE'S HAM SHACK Whealon, Maryland ELECTRONICS CENTER, Inc. Dallas, Texas WORLD RADIO LABS, Inc. Council Bluffs, Iowa CANADA M. J. HOWARD CO., Ltd. Ottawa, Canada Lower Sackvillo, Nova Scotio, Canada The story of amateur radio in Canada. On January 1st 1967 the ears of the amateur world were somewhat startled by the appearance of a whole series of...

Wandv

A new and much needed medical service began last fall when Duke University Medical Center Amateur Radio Club began PROJECT MED-A ID Medical Assistance for Isolated Doctors to provide up-to-date medical advice, consultation and encouragement to doctors working in remote areas throughout the world, To provide this service the Club station, WA4BLK, is manned daily, and the frequency of 14,250 kHz is monitored continuously. Doctors on duty from 0900 Dr. E. Croft Long, Director, Project Med-Ard,...

Utc A

Thordarson 20A19 Thordarson 24S60 Triad R-4IC Miller 6330 Thordarson 20Ci Stancor C-I00I None Stancor A63C Stancor A3856 PPl CRT Xfmr Note Knight numbers are from Aflied's Industrial Catalog No. 670. Units shown In the Other column are cross-referenced equivalents th oug n the au thor has no knowledge of them ever having been used In the monitor's circuit, all should be satisfactory- Table I, Major Component Cross Reference

Dpz Corporation

BOX 1615 JUPITER, FLORIDA 33458 that they run a frequency-stability check on each transceiver and include the curve with the unit. The frequency drift on my Galaxy V, Mark 2 is less than 100 Hz in any fifteen minute period, and most of that takes place in the first thirty minutes after its turned on. After forty-five minutes or so it's difficult to detect any drift at all. This was borne out when I had the opportunity to see the Mark 2 VFO run into a digital frequency counter once you set...

F

The Halticrafters HT-46 . , , A New light weight compact quartz filter SSB-CW Amateur 5-Band transmitter employing new single conversion signal path circuitry of advanced design, 180 watts PEP on SSB, 140 watts CW. Upper or lower sideband via 9 mc. quartz filter. Built-in power supply, Press-tO'talk or optional plug-in VOX. Grid block keying for CWF Can be used with SX-746 Receiver for Transceiver Operation. Used Equipment Special SX-111 139.95

Lmf

La V Kr - -m - r M I -V - - I - -- - W i -----------H B HI M - 1 ' V Here Kay Kibting, W2HXQ, custodian of the W2USA license and Chief Hostess, is shown operating the 20-meter station. This position consisted of the national HRO receiver shown here and a glass-enclosed National NC-600 transmitter which is out of the picture to the left. The heavy wires running up the walls are actualfy the solid number 12 electric light wires used for lead-ins from the antennas, including the one on five...

Wnsd

The committee also presented a copy of a letter from a VU amateur claiming that Hie Laccadive expedition was not officially authorized. They further pointed out that Don's logs in an AKRL Sweepstakes contest and a DX contest contained some entries not con-firmable in cross checking, implying to me that he was being accused of blatently cheating in these contests. So, on the basis of the above accusations they suspended credit for six countries Don had visited . . , plus any further countries...

And MHz

In recent months, numerous articles have described VHF if amplifiers using encapsulated FETs, Unfortunately, they are usually unavailable at the local electronics store, This article is about an FE that's not quite so cheap, but which is available off the shelf at any Union Carbide transistor distributor. The only drawback, if there is one, is the enst of the 2N4416, They were S7.H apiece in February, but since have come down to about 5.00 each in small quantities. The manufacturing data sheet...

Enroll Under New Gi Bill

All CIE courses are available under the new G,I Bill. If you served on active duly since January 31, 1955, or are in service now, check box in coupon for GJ. Bill information. l o ti i th St., Dept. bT-i 3, C.e elanJ. Ohio 1776 E, 17th St., Cleveland, Ohio 44114 Please send me without cost or obligation L Your 40-page book 44How To Succeed In Electronics describing the job opportunities in electronics loday, and how your courses can prepare me for them. 2. Your book on How To Get A Commercial...

Jt

Maurice Hindin W6EUV 8920 W lsh re Blvd. Beverly Hills, Calif. A Simple Switch to Separate the 32S-3 and 75S-3 the receiver and excitcr cross band at more than 200 kHz frequency differential, then it is necessary to completely disengage the two units. This means that mechanically it requires the operator to unplug the connecting cables and reinstall the dummy load in the receiver. To overcome this mechanical inconvenience of changing cables and making the other changes needed to switch from...

Sreak Connections And Ado Jumpers As Shown

Installation of the 2N4416 or TIS-34 FET in a two-meter nuvistor converter. The 330 ohm source resistor shown here is a typical value only the correct value is determined experimentally for the proper amount of drain-to-source current ant best noise figure as explained in the text. un ways and means of pulling the tubes out of existing equipment and replacing them with these new and more efficient devices. The main difficulty was that the conventional bipolar transistor is a low...

Input

Front view of the slow-scan TV monitor. This drawing shows the location of the various controls- Fig, 2, Chassis layout of the slow-scan television monitor built from a surplus PPI Range Indicator. Existing chassis holes were used where possible. Fig, 2, Chassis layout of the slow-scan television monitor built from a surplus PPI Range Indicator. Existing chassis holes were used where possible. Right side of the slow-scan TV monitor The limiters, sync circuitry, horizontal trigger and...

O

4D0 T PNAT DIODE TO CASE l JTERlQr sulate it, and tape it to a cable under the dash, I hate to insult your intelligence but 111 tell you how it works anyway. II you have your headlamps or parking lamps on. and the ignition switch is off, there is a i 2-volt difference at the ends of the series circuit and the buzzer sounds off the diode is happ gt v ith the arrangement. If you leave the lights on and turn on the ignition, there is 12 volts at each end ol the circuit and the buzzer shuts up. If...

Dvp

Box 204 Amherst View, Ontario Canada A new construction approach to the famous G4ZU three- Any ham who has built and used the G4ZI mini or super-beam , knows the advantages of these antennas cheap, light, readily tuned elements and 20-15-10 meter operation. The disadvantages special clamps, insulator s, and feeding problems. First, a re-cap of the G4ZU element tuning principle i see Fig. 1 . AB and CD are two lengths of aluminum tubing arranged in dinole fashion and...

Gbid

Telrex Direction Indicator

KITS and ROTATOR SYSTEMS Most Technically-Perfected, Finest Communication Arrays in the World Precision-Tuned-Matched and Baton Fed for Balanced-Pattern to assure TOP-MAN-ON-THE-FREQUENCY Results Use. is one of the most dependable testimonials of endorsement, and Te rex products are in use in 139 Lands Enjoy, World renown TELREX performance, value and durability Send for PL67 tech, data and pricing catalog, describing professionally engineered communication antenna systems,...

E M J

Probably the best known and most active of the Navy stations, the Bonnie has run hundreds upon hundreds messages and phone patches between her home base at Halifa and her cruising areas in many parts of the world. Presently undergoing a refit, the big gray lady will be back on the air again before too long, amateur rules of operation, Over the years the Navy has contributed far more to the continuance of the VE0 calls than have any other group. The advantages have...

Ew

The triode portion of a 6AW8 is a heterodyne oscillator whose plate voltage is regulated, and whose frequency is determined by one of the eight switch-selected crystals. Its output is also coupled to the grid of the 6EW6 heterodyne mixer. In passing, note that the sole function of the pentode section ol the same 6AW8 is to amplify the heterodyne oscillator input from the companion receiver, the SB301, when operating transceive. Only when the mode switch is in the transceive position is plate...

Telrex Communication Engineering Laboratories

If you've been procrastinating about getting on sideband, why not try this simple double-sideband adapter for AM rigs. This rig originated one day several years ago. VE6BT, Bill, was visiting wTith us and I was explaining this idea to him. He became enthusiastic and said, lets build it As i was working on my scope at the time, I drew up a diagram for iiie adapter designed to work with my Ranger, rounded up some parts, and Bill proceeded to build the thing in the workshop, i got the scope ready...