Dave Mann Kagz

K tNNE LON l JQ7*tKj AN OLD FRIEND (HENRY RADIO) INTRODUCES A NEW NAME A NEW VALUE A NEW TRANSCEIVER. THE TEMPO ONE'SSB TRANSCEIVER REPRESENTS THE CULMINATING ACHIEVEMENT OF MANY YEARS OF EXPERIENCE IN THE AMATEUR RADIO FIELD. MODERN DESIGN, SUPERB PERFORMANCE, HIGH STYLING, STURDY CONSTRUCTION, OUTSTANDING RELIABILITY, EXCEPTIONAL VALUE - ALL THESE FACTORS COMBINED FOR THE FIRST TIME IN AN AMATEUR SSB TRANSCEIVER MAKE THE TEMPO 'ONFTHE OBVIOUS CHOICE IN TODAY'S AMATEUR MARKET....

Toroid Power Transformers

F T-2 This toroid was designed for use in a hybrid F.M. mobile unit, using a single 8647 tube in the RF amp, for 30 worts output. Schematic included 12 VDC pri. using 2N1554s or equivalent. Sec. 600 volts 0C out at 70 watts. Sec 2 65 volts DC bias. Sec. 3 1.2 volts AC for fjfament of 8647 tube Sec CH feedback winding for 2N1554Js, thick. 2KV dia. 2 95 ee. -2 for 5.00 T-3 Has a powdered iron core and is built like a TV fly back transformer Operates at about BOO CPS. 12V DC Pri. using 2N442's or...

Variable Capacitors

Johnson 157 5 5 to 75 PF _ 75* Johnson 5KV ,5 to 12 PF Variable 5 Section 465 per sec shaft CERAMIC TRANSMITTING Door Knob Capacitors 40 PF 5 KV 50 PF 7,5 KV 500 PF 20 KV _ 75c 600 PF 12 KV NEON PILOT LIGHTS snap in type 7 16 hole w resistor INTEGRATED CIRCUITS FACTORY FRESH NO REJECTS with spec sheet FAfRCHILD UL 900 Buffer UL 914 w 30 projects diagrams S0c 10 7.50 UL 923 J.K. FJipflop 1.50 10 13.50 MC 789P Hex Inverter MC 724P Quad 2 Input Gate MC 799P Dual Buffer MC 780P Decade 3.50 MC 767P...

Editorial By Wayne Green

Anote from one of the officials running the ARRL National convention in Boston explained that Huntoon again has forbidden them to allow anyone from 73 to appear on any program. There being more than one way to skin a cat, we have arranged to have an auditorium room at the convention in which to run our own program. This is more than sour grapes, judging from the number of letters we have had asking if we were going to be able to show my slides of King Hussein, if Ken were going to be able to...

Noa

The NE560 NE561 IC PLL is rated for operation only up to 15 MHz, although many units operate satisfactorily up to 30 MHz, Operating frequency for all units can be increased to approximately 60 MHz by connecting pins lt 2r 3, and 8 as shown here. This modification can be applied to any of the accompanying circuits. The pot serves as a fine-iuning controlf replacing the current injection into pin 6- If current inject jo n is to be used, the pot can be omitted from this circuit. an FM...

Vosafv

Some of the Romanian QSL cards received by W, K amateurs. Aurel (Y02BS) Leo (Y 2BM), and George (Y02BB) during their SSB expedition on the peak of the Semenic mountain. The receiver is a Lafayette HA-350 and the transmitter is homemade, huilt by George. Many club members and operators of club stations also have individual stations at their homes. Some of them began in radio years ago as young pioneers. Mircea, Y02QM, and George, Y03FU, former operators of Y02KAC, are today top DX men. Aurel,...

Pushpull Inputs

PLL makes fine frequency multiplier or divider. For this application, audio output connections are ignored and the VCO output is used instead if input is single-ended, one of the two push-pull input leads should be bypassed to ground as shown by dotted lines. Circuit will muJtipiy up to 10 times, and divide input frequency by 3f 5, 7, or 9 CI and fine-tuning adjustment must be set for operation near desired output frequency. When input is applied, VCO will lock to exact multiple or odd...

Info

A YO contact is obligatory in all cases. YO-5 ON 5 (Worked 5 Continents ort 5 Bands). here are needed 5 two-way contacts with 5 DX continents, each on a different band 3.5 14 21 28 MHz. The pa i pipes are played in Romania s southern provinces (YO3, Y04, YO7, and YQ9). The pa i pipes are played in Romania s southern provinces (YO3, Y04, YO7, and YQ9). There are 6 continents Asia, Africa, Europe, North America, South America and Oceania. Own continent does not count for this award. Additionally...

Jqk

Background music adapter for FM receivers uses type 565 IC PLL. 510 pF capacitors and 4.7 k l resistors at input form high-pass filter to keep audio from FM set from overloading PLL ladder filter at output removes everything above about 10 kHz to keep from overloading audio amplifiers following. Pot allows frequency to be adjusted to 67 kHz to pick off SCA stibcan-ier change the output levels to values which are compatible with normal digital IC chips. In this case, center frequency is...

Watt Ssb Transistor

A new single-sideband transistor furnishing 30W PEP across the L5 to 18 MHz band is announced by TRW Semiconductors, The new PT6738 has a gain of 13 dii and intermodulation distortion guaranteed 30 dB or better. Operating voltage is 28V. The unit is in the TO-59 package which is compatible with the TO-60, lie new tmn-sislui is i product of i IUV Scmicon-d uc t or I) j vision, ('onimu meat ions Transistor Plant, 14520 Aviation Blvd., Lawndale, Calif. 90260. Representatives from five major...

Czc

Function generator schematic diagram rate with RL and the high current capacity vs low leakage current of the opamp allows the charging rate, and hence the frequency, to be varied over a 500-to-l range, compared to the normal 10-to-I range for normal capacitance-con trolled oscillators. If a current were just fed into the opamp, the capacitor would continue charging until the limit imposed by the opamp and the power supply voltage was reached. However, A1 is connected to the frequency...

Radio Handbook

Completely updated edition of the famous communications handbook which is the electronics industry standard for engineers, technicians and advanced amateurs. Explains in authoritative detail how to design and build all types of radiocommunications equipment- I ncludes SSB design and equipment, RTTY circuits, latest semiconductor circuits and IC's, as well as special-purpose and computer circuitry. 896 pages hardbound- Order 24020, only, . 13.50 The Radio Amateur's F-M Repeater Handbook This is...

Worked Europe

Cards must be furnished confirming two-way amateur radio contact with each of the following areas G, GMT GW, CI, GC Jersey, GC Guernsey, GD, EI, F, D, DL7, DM, EA, EA6, FC, C31, I IB, HE, OL , OK, HA, YU, OZs I A, SM, OH, OU0, OJ, CT, YO, AZ, SV, SP, I, Ml. HV, IS, IT, SV0 Crete, SV0 Dodecanese, LZ, TF, OY, ON, PA, LX, ZB2, 4U Geneva , 9H1, TA European , SMOM, JX, JW Svalbard, JW Bear, UA2, UA, UB5-UT5, UC2, UD6, UF6, UG6. U05, UP2, UQ2, UR2, a total of 65 areas. Certificates are available for...

Nothing Comes Closer Than The Swan Cx

Swan Mobilantenne Model 45e

The performance of the Swan 500CX n your car may not quite equal your home station, but you will be amazed at how often the difference is very small. Many Swan mobile operators have established enviable DX records. QSL cards on file here at the factory verify solid contacts from all continents, including stations in Antarctica. Old timers who have fought QRM with o d style AM equipment have discovered a new world of mobile communication thanks to the power and punch of the Swan 500CX...

Vanguard Labs

A ground signal from normally closed contacts on the COR slave relay completes the circuit on the timer coil. This double duty provides for an extremely safe and self-controlling repeater system. As with the tone-burst circuit, the diodes in the whistle-on system are for isolation, he one in the no signal present ground line keeps the circuit isolated from the signal present logic. The diode in the negative voltage line isolates the tone present signal from the continuous...

Hpx

Push Talk Circuit For Radio

Tone-burst repeaters can be set up with nothing more than a relay and a timer if the decoder and COR logic signals are available. Here, a short tone burst will energize the control relay, which latches as long as a carrier stays on the input. If the carrier stays on more than i.5 minutes, the repeater will go off the air and a new tone will be required. Each transmission must be accompanied by the proper tone burst- keep the COR ground signal from being fed to the repeater push-to-talk...

Hypass Capacitors Sprague

6 irM 50 VDC 40A 25 ea 25 5 DO 5 i i 00 vOC 20A 3D ea 20 5 00 Ot t - i ii C 40A 25 ea 25 5 00 Sangjmo 1 3,500 mtd 15 VDC 1 00 ea 6 5 00 Mallear v 8,000 o fd 55 V DC 1.20 ea 5 5 00 Malfory 8 m'ci 400 VDC . . .25 ea 25 5.00 Gudernan 01 mfd I0r000 VDC 2,00 es 3. 5 00 Piasi.c Cap I nc .05 mfd 10K VOCW 1.00 ea 6 5 00 Sfjr rjue Twist lo T VL2767 50 50 mfd 450 WVDC - - 1 00 ea 6 5 00 G CP7001 F P504K .5 mtd 6000 VDC 2.25 ea 3 5.00 Please include sufficient postage. . Many ot aer items. .Send for free...

Slated

National Amateur Historical Radio Conference, Canandaigua, NY, Oct. 9 th and 10th sponsored by the Antique Wireless Assn. Program includes well known speakers from coast-to-coast, early transmitting and receiving demonstrations with prizes plus old equipment auction. In addition to amateur programming, there will be special events for the old time commercial and broadcast operator. Write for details Lincoln Cundall, W2QY, 69 Boulevard Pkwy., Rochester, NY 14612. i ne uuy or Cleveland, unio nas...

Gad

Fig, 7. input and output waveforms show how push-push do u bier works. Grid waveforms, at fundamental frequency, are equal in strength but opposite in phase. Same waveform, only ampii-fied and reversed in phase, appears at plates of tubes together with second-harmonic component introduced by tube's operating conditions, In output circuitt the two fundamentai waveforms cancel each other out, leaving only the second harmonic. even harmonic, so by tuning the output circuit to the desired frequency...

Peter W Dahl Co

El PTexas 7 amp 924 Tare -4856 S2195 to 543,95 THE VIBROPLEX CO., INC, Now for the harmonic-generator tricks. When we use a harmonic generator to double or triple a frequency, we want a single specific harmonic and we don't want any others if we can help it. As it happens, there's a special type of circuit which can generate even harmonics but suppresses odd ones, and another circuit which generates odd harmonics and cancels out the even ones. Use of these circuits makes life...

S

Complete, ppd usa amp cttn. send a check or m,o. sold by moil only The following is m adaptation of an experiment common in most basic college physics courses. There is an easy way to automate the comparison of light intensities used in KICLL's wattmeter, August 73 Mount the two bulbs rigidly and place a small square of shopping bag paper, which has a spot marked in the center, with margarine or some other light oil. exactly equidistant between the two bulbs. When the bulbs have the Same...

Multiantenna Coupler

10 15 20 metersTerminals SO-2 39 29.95 ppd Change bands without having to switch antennas Combine your antennas into a rnuiti-band antenna system while retaining optimum Coupler feeds any combination of antennas from a single transmission line Saves operating time Saves coax and switches Coupler isolates the line from all antennas but the one in use Works with all types of antennas Handles full legal power Models available for any bands, 2 to 160 metersi Weatherproofr Write for free information...

Ct

John Costas W2CRR and G. K. Webb W0AHM 2 both with General Electric in Syracuse, Y. at that time , overcame the problem by deriving the control voltage for phase-locking from the sidebands rather than from the carrier. Unfortunately, their circuit has not yet been implemented on an integrated-cireuit chip so far as we have been able to learn and so we must wait a bit longer for that happy time. Right now, though, we can build an FM receiver with excellent performance...

Our

K9KHW Mgr Mai J Order Sales Ray Grenier. K9KHW Mgr Mai J Order Sales To AMATEUR ELECTRONIC SUPPLY 4828 West Fond du Lac Avenue Milwaukee, Wisconsin 53216 t am interested in the following new equipment I will pay balance if any Q Revolving Charge Plan The completed 500 mA regulated low-voltage power supply. operate to supply to 18V and 500 mA. Other changes include the use of a temperature-compensated zener diode, variable voltage output, and current limiting by use of the fourth...

Schematics Available From

ARC-27 2M Guard Channel Receiver. SSB Transceiver, Nov. 1961 73, page 23. R508 ARC, June 1965 page 48, before Si after. 73 Magazine. Peterborough, N.H. 03468 Now we don't say that every single reader must buy every last product advertised in 73. We believe that, but we don't say itT The very least every reader can do is to put on a show of interest in the products herein advertised. To make this a simple task, even for the laziest reader now there is a contest...

Includes

X Complimentary In Flight Meal and Beverage Service. Round-Trip Transfers from Airport to Hotel. Deluxe Air-Conditioned Room at the Exciting Flamingo Hotel for 3 nights double occupancy. Single occupancy 10.00 additional. SAROC Advance Registration. SAROC-Ham Radio Magazine Cocktail Party Thursday, SAROC Fabulous Dinner Show Flamingo Hotel Thursday, u SA ROC-SWAN Electronics Cocktail Party Friday. SAROC Midnight Show with Two Drinks Desert Inn Hotel Friday in Main Showroom. SAROC No-host...

Small C Tune

Stations were heard, and in particular, using a J 00 ft wire, Q5 signals were heard that could not even be found on the dial without ttie 590 preamp. It works 1 lie 6m values for the inductors are as follows LI - 4 turns at 8 turns per inch, 16 in. diameter L2 - 5 turns at 4 per inch, 9 16 iru diameter L3 4 turns, wound on L2. Figure 4 shows the 6 meter version of the HEP 590 amplifier. So the Motorola 11KP 590 IC linear amplifier works as claimed. It is a relatively easy IC to practice on,...