Vecea

A remote receiving V.F.O. has been added to the Inoue IC-21 making a winning combination two meter station. To introduce the new Inoue IC-21 VFO and IC-21 package, we are offering a special introductory deal. Send us this ad and we will ship the Inoue IC-21 and Inoue IC 21 VFO prepaid for only S450.00 complete. This is a savings of 59.00 over the regular price of 399.50 for the IC 21 and 109.50 for the IC-21 VFO. 185 West Main Street Amsterdam, New York 12010 N. Y.S. residents add appropriate...

Magazine

Teletype Model 15 less cover with Synch Motor & Keyboard 49.50 Model 19 with Synch Motor Keyboard (wnh built in Tape Punch) and Trans. Qtsr. less rabies . . 85,00 Typing Reperf Strip Prmter type S24.50 Non typing . S19-95 Teletype Paper Carbon Type case of 1 2 roils S3.95 Reperf. Tape 1 1 16 case of 40 rolls . . . . 4.95 88 MH Coils Package of 5 1.50 Collins Variable Crystal Oscillator contains 7 8 crystals mounted on a turret with a precision geared switching arrangement thai selects the...

Krly

Harry Simpson A4SCF c o 73 Magazine Peterborough NH 03458 Due to the lead-time necessary for publishing a national magazine, J am something like the moth - living in bathing suits in the winter and fur coats in summer While still untangling the loose ends of last year, I must concentrate on new plans for making 1973 a banner year for all concerned with the various MARS programs Let me begin with an apology for the delay in answering some of your letters. When Alice and I returned from our...

R K

Dummy load was fed through a T connector so that a few inches of wire coutd be connected to the high side as a transmitting antenna. An admittedly crude set of tests of listening to oneself was conducted and the step attenuator adjusted to something resembling equal intelligibility of processed speech after unprocessed speech had been used. With almost full ALt the RCA MK 107 microphone showed 5 or 6 dB of voice power advantage for a variety of processing adjustments, even though the...

Getting Rich

The more I think of it, the more I'm convinced that one of the really great opportunities open to radio amateurs is in the selling and installation of security devices. Our radio and electronic background gives us what we need in the way of skills for designing and installing systems. It is a business that can be started in your spare time and requires no big investment in equipment or offices. You can get started with little more than some letterhead and a phone number. The market is virtually...

Twx

View of the foregoing, the rule making petition plainly does not warrant Commission en banc consideration, Accordingly, the Comissron by the Chief, Sdtety and Special Radio Ser vices Bureau, pursuant to the autho rity delegated in 0.332(m) Gf the Commission's Rules, ORDERS, that the petition filed by Michael FL Beverly is DENIED. James E. Barr Chief, Safety and Special Radio Services Bureau The proponents of discarding the adopted 600 kHz band plans (CARC, SERA, NERA, Texas, Central States,...

N E W

Designed for the man who demands professional standards in 2 meter equipment. REPEATER LINE fixed station antennas are the 2 meter HAM's dream come true. With everything you need for top fixed station performance toughness, efficiency and the gain to gain access to distant repeaters with ease. Work many stations, fixed or mobile, without access to a repeater. The right antennas for the new FM transceivers or any 2 meter fixed station. REPEATER LINE Fixed Station Antennas Tough, high efficiency...

Mxvg Sstv Monitor

UNIQUE TUNING EYE INDICATOR - Takes the guesswork out of tuning. You know when you are perfectly tuned on an SSTV signal instead of hoping you are. EXCEPTIONALLY BRIGHT PICTURES - View Pictures in lighting conditions where so e monitors would be difficult to view. PLUGABLE CARDS - Two plugable printed circuit cards have the majority of the components on them thus, if any problems are encountered just send the cards back for fast service, NOISE IMMUNITY CIRCUITS - Viewable pictures under high...

Info

NOW BRUTE FORCE IN A 12V BENCH SUPPLY- THE WALLER 60 AMP 12 V0LTSUPPLY A bench power supply for mobile equipment. This brute of a supply will run a mobile rig and even an amplifier from 110V ac. The output is a nominal 12V dc at 50 amps and is usable to a full 60 with a slightly lower output voltage. The heart of this supply is a constant voltage transformer rated at a constant output of 60 amps. The supply features built in voltage and current metering. The Waller 12 volt 60 amp supply is only...

Wagtdd

I suppose that the following is my own fault for not writing earlier and correcting it. In your recent Repeater Listings and other ones around, they show WA6TDD in LA. as basing an input of 147.420 MHz, with an output at 146.40 MHz, The inputs, of which there are two, is FM at 147,435 MHz and AM at 147.405 MHz. I realize this is an odd-ball situation. TDD has been an AM open channel repeater on Mt. Wilson since Nov. '62. At the time we were at 145.425 MHz, with the AM input The repeater was...

Yaesu Ft Auto

Great new features like Auto-Scan and a special Priority-channel piace the FT-2 AUTO in a class by itself These unique capabilities are achieved with advanced digital-logic circuits. Here's how they work With Auto-Scan on, the receiver scans all 8 channels at 20 channels per second, Indicator lights provide a visual channel display, stopping on receipt of a signal. At the end of each transmission, the receiver continues to scan. Just push a channel button to skip over any channels you wish...

Us Callbook Dx Callbook

with service editions with service editions Mail orders add 50 per CALLBOOK postage and handling. See your favorite dealer or send today to The CALLBOOK is a vital part of every amateur radio station. Over 265,000 listings in the US CALLBOOK and nearly 200,000 in the DX Edition make these two volumes an Indispensable reference. Not only do the CALLBOOKS list QTH's, but they also have page after page of valuable charts, tables and maps atl designed to make your operating more efficient and more...

Meg

Crystal diode noise limiter circuit. is then required which will conduct sufficiently to allow that precious signal through, but will not conduct to the noise riding on top of the audio signals. This circuit must also perform this function on both the negative and positive half cycles of the required signal. A well known tube circuit which performs these functions is the Dickert noise limiter. However, I had no incliniation to fit yet another tube to an already crowded receiver chassis,...

Transmitter On A Chip

Lithic Systems

Someone eventually had to do it - and they did. Lithic Systems has announced a comolete AM transmitter on a tiny IC chip. Designated the LP2000, it is capable of 50 MW output on 10 meters when fed by a 12V supply. Operation on 6 meters is also possible with slightly reduced output. The block diagram shows that the chip isn't a simple oscillator modulator as you might expect. Not only does it have two buffer stages between the oscillator and output stage, but it incorporates a power supply...

Chenango St Binghamton Ny

The power supply uses a transformer rated at 500 Vet 50 mA and 6,3 V 1.2 A. Using a full wave rectifier on the 500 volis and 40 jiF 450 volt capacitor gives approximately 300 volts dc under load. Three 27,000 2 two watt resistors in parallel drops the voltage down to the zener diode rated at 180 volts 10 watts. In series with each Nixie tube, there is a 22,000i2 half watt five percent resistor, I he recommended voltage for the Nixie tube is 140 volts at approximately Vh mA. This arrangement can...

Transceiver

NOW THE PROMISE OF THE TRANSISTOR HAS BEEN FULFILLED. HERE IS THE TRANSCEIVER YOU WILL WAUT TO OWN AND CAN AFFORD. FOR YEARS AMATEURS HAVE WAITED FOR THE NEW GENERATION GENERAL PURPOSE SSB TRANSCEIVER. NOW THE WAIT IS OVER. V HATEVEH TRANSCEIVER YOU OWN GET READY TO TRADE. FEATURES Break-in CW with sidetone provided Built-in 100 KHz and 25 KHz crystal oscillator it The receiver incremental tuning control can vary the receive frequency 2 KHz or more RTTY Built-in frequency shift circuit for FSK...

Twotone Test Generator

In the testing of amplifiers and other devices associated with Single Sideband systems, the two-tone test has achieved a great degree of acceptance. Regardless of how the test is performed, whether looking at the output of the device under test with an oscilloscope amplitude vs time or with a spectrum analyzer amplitude vs frequency , the basic input requirement is two good sine waves. In the laboratory, such a two-tone signal is usually obtained by using two good quality audio oscillators,...

Division

3050 Hempland Road, Lancaster, PennsyJvania 17601 Tel 717 299-3671 Teiex amp 4-843S tween Topeka, Kansas and Los Angeles CA, and must be picked up at their location. Prices range from S1 for a fVTodef 14 Non-Typing Reperfera-tor to S25 for a Mode 15 Page Printer. Contact Mrt C. C. Glover, Purchasmg and Materials Dept., AT amp SF RRYr P.O. Box 1674, Topeka KS 66601. THE OSCAR 6 AMATEUR SATELLITE IS IN ORBIT NASA team inspector swabbing down AOC courtesy NASAUSAF , NASA team inspector swabbing...

S

Fir vaitaqt gain is typipitltj J bdb xt J J to vsffi Ji ji uw ii typically -L5JL, Supctttft f tin p Aj-04jncot a i iff ttOHC 1 tiuut itJi ic- iUf FtT'j. Gl lt XLtC f It.incCi IpUJLLauA t pC i.1 i k FM receivers. Sdcfe t fttCK diodes p otzct each iA tn Mu icUj.z amp i CF porre jaoi if tkizZdulg qs oi-tmi and output circuit t cn bet itJei oi PC bcn.zlt 311 poxy jiais boottf a-ii iwn SF fiza e tSvxn ci l H dh, SL V lt - tii lt JT vF Ut- cJ CA fjoe contztcZoih. Unit CtfrCi CctjIJ tc -Utk .ill...

Dualbeam Scope

This new Philips instrument is offered at approximately 900 as the successor to the widely used Philips PM3230 for a wide variety of applica tions in industrial electronics including telecommunications, television, education, computers and peripherals, and electronic maintenance. The PM3232 combines a number ot features that can often eliminate the need for a more expensive, higher bandwidth instrument when only one or two individual features, such as 2 mV sensitivity across a wide band or dc...

Communications Technician

First Phone with Radar. Amateur Extra license. Experience HF, VHF Communications Antennas Aircraft Navigation Test Equipment maintenance, caiibration, Also Technical Writing, Drafting, Machinist, Management experience. Age 27. Seek Challenging Job with Responsibility. For Resume write John Brosnahan K0UTX, P.O. Box 1716, Boulder, Colo. 80302. YOUR CALL LETTERS. Two sets, for windshield and rear glass. Smart white tetters with red outline. Easily installed, pressure...

Tentec Linear

Ten Tec 405

TEN TEC Inc. has announced the introduction of the Model 405 Linear Amplifier to their line of amateur radio equipment- Completely solid state, the amplifier delivers SOW of power to the load in the frequency range of 3.5 MHz to 30 MHz when driven with less than 2W. Features include broad band design, two panel meters indicating rf power and standing wave ratio, exciter-actuated changeover relay with adjustable defay time and 12V dc operation, Its small size and light weight make the amplifier...

Using

He International Crystal Manufacturing Co. is to be congratulated on putting out a series of four little 1V4 X kits with printed circuit boards and all the components needed to make up an excellent six meter converter for a total of onlv SI7,40, including the transistors and the local oscillator crystal. Included are two rf stages, a mixer, and a crystal-controlled oscillator, each only 1 W X IW and 1-1 8 high. These are complete down to the last detail of plug-on connectors they are furnished...

Portable Test

The Lee Labs Dynamic Serviset is quite a little piece of equipment It is basically an rf af signal tracer, but with a horde of extra features. Built into it is the ability to test the prsence of ac or dc voltage and substitute three different ranges of resistance and two ranges of capacitance. It can also test the resistance of a particular circuit and even determine the leakage of a capacitor. The amazing thing about this device is its ability to make fairly accurate checks on circuit...

Builtin W Rf Wattmeter

TOP BAND SYSTEMS introduces the TBL-2000, a totally new concept linear amplifier with self-contained AC power supply and built-in RF wattmeter. Weighing but 18 pounds, the TBL-2000 packs a full kilowatt CW and 1600 watts PEP SSB on 160 through 10 meters including MARS, Assembled in a rugged package, the TBL-2000 boasts a tube compliment of five hefty 6LF6 power pentodes, each with its own easy-reach side-pane mounted bias potentiometer for peak performance. Our team of engineers designed the...

Wajmy

FSENS'TlVJTV B M r than lOdb itflnai-piui noi to f tio for 25 rmcrowoU gl 20 MHZ SELECTIVITY 24 KHZ 6dt gt , 1.8 1 16 6Qdb factor 116 pol crystal t ttic F lt Jt flJ i options CW 250 and 400 HZ FSK 1200 HZ ICARRJER and unwanted iitiftband lupprassion. Minj mum 60dbP i IMAGE and IF REJECTION more than 60db, POWER LEVEL 300 to 500 att pep continuous duty cycle. POWER AMPLIFIER 8072 finat completely broad banded driver and final. 1 SO watts connnuous diu gt pa tion rating. I ALL MODES 10 thru 160...

Kit

USES THE LATEST STATE-OF-THE-ART THREE TERMINAL REGULATOR cmcurr amp Y, HAS INTERNAL CURRENT LIMIT, THERMAL SHUTDOWNt AND SAFE-AREA 0 lt JMFENSA K 'N . S M r UAR r O MA NSA NT C MAN - 1 A N D OPCOA SLA-7. r TS IN 3A PIN D SOCKET DISPLAY KIT J . NC LU DES 1 SEGMENT LED , 7 47, 5 95 AMD 74 gt 0, DISPLAY KIT , INCLUDES 7 SEGMENT LED, 7447, 7490, 6.95

Navy Tcs Transmitter

Jus arrived This collector s item is now available in new condition' 1.5 to 12 Mc. CW and A 1. 50 watt CW, Ideal for a raft of multi-purpose uses. Designed by Collins Radio. Grand new A Columbia special 75.00 COLUMBIA SLASHES TEST TEST EQUIPMENT PRICES Worid's largest storehouse of meters, signal generators, scopes, etc, All popular models. Immediate delivery' This compact unrt can be used with most Hsm Receivers after conversion. Complete with conversion info and schematic. Good condition 2...

Editorial Staff

Wayne Green W2NSD Keith Lamomcs W7DXX Ron Subka WA9FPP Yvette Grimes WA8ULU Jim Ky e K5JKX Mike Frye WB8LBP Biff Turner WA0AB Jim Weir WB6BHI Harry Simpson A4SCF Dave Ingram K4TWJ Bill Ho sington K1CLL Philip Price Lynn Panciera-Fraser Ruthmary Davis Bill Sundberg Janet Oxley Bill Suderman Karen Hebert Cynthia Schlosser Biff Mahoney Dorothy Gibson Barbara Block Ace Goodwin W1GRO Ginger Pettee R. K. Wildman W6MQG B ill Mo relio Wayne Peeter K4MVW T. M. Graham WSFKW 29 Obscene Commission That...