FIGURE

With the first (or the push-to-talk control on the transmitter mike that wouldn't have to he held down during the transmission). At this point you may be asking yourself, Why doesn't that guy go out and buy a multi position relay Well, I do the most with what's in my junkbox before spending a cent A word of caution make sure that the contacts on the switch and relay con tacts can carry the current and have necessary insulation from adjacent contacts in your application ol any sequential...

Quz

If you want to pre-register drop a note to Dayton Hamvention, Box 426, Dayton 1, Ohio. rhe ninth issue of 6-up is going to press now. The big feature in this issue is a construction article by Bill Ashby on his Flying Noise Lock unit which is described in theory in this issue of 73. Bill wanted us to run the circuit in 6-up exclusively in order to bludgeon more fellow's into subscribing to 6-up. Laudable. I hated to see such an important breakthrough get only six thousand circulation when it...

Wemf

This sweep generator solves most of your if and crystal frequency problems. Operates on center frequency 455 kc. Compfete kit W2EMF- 1 95 BASE STATION ONLY 399s NET CUBICAL QUAD Tailor mad to increase ranrce in limited CB band. Toutch, lightweight components permit use with most TV-type rotors. Easily assembled on ground or tower. SPECS Forward Gain 8 db Front to Back, up to 40 db Feed Type, 52 ohm coax Polarization, horizontal or vertical Longest Element, Boom Length. 65 1 2. AIR SENTRY...

References

ARRL, The Radio Amateur's Handbook, i962 edition, pp. 228-236, Anon., Zener Diode Handbook, International Rectifier Corporation, published I960, Anon,, Regulated Power Supply ' Radio-Electronics, April, 1959, 125. Bramham, Kenneth* Voltage Regulation for Transistors Electronics World, July, I960, page 62. Ch ipnian, L. IX, W IPRM, ' Combination Regulated Power Supply ' QSTt October, 1957. page 16. Cliristmau, C. J., WASAFF, Power-Supply Control and Regulation by Means of Thyratrons ' QST,...

O V

Voltages could lead to a better noise figure. The amplifier is very stable, since the S058 with the grid connection coming out on the entire socket, lends itself to grounded grid circuits. Before working properly, the tube must warm up for at 3east ten minutes. This time is needed for the transeonductance to go up. Connect the amplifier to the converter and and to the antenna and tune the plate condenser. At one point you should notice a small but definite increase in noise the amplifier is now...

Info

RT82 APX6 1215 I296nn- tlie EASY way NEW 24,75 UPM8 Te> is APXG.27 Tubes, 10 Dlories. 2 Xiai < -1 - 11,5 Coax Cable, Curiums APX6 to UPM8 EX 1.50 RT IB ARC I 100 15ti mc Transceiver EX 37.50 RT58 ARC 12 225- ft0 me. W 4St tubes, 2-2C39A* EX 20.75 C45 Com mi IUix for ARC1 & ARC12 KX 1.25 T496 ALT7 lG8-352mc. W 2-6161'8. 12-24V IILOWER EX 22.50 BD100 RTTY SWBD W 10-BK27A Polar ItMays KX 23.75 BLOWER, AXIVANE, (JO CFM( IS-MWU DU LllvK BLOWER HASH FILTER, DC, Fnttnr H110 N i ' BLOWER HASH...

WDUD

Bill Ashby K2TKX lias been working hard at digging down deeper and deeper into the noise after weak signals. His article on synchronous Jetection in the September 1962 issue of 73 started a lot of fellows thinking about the subject. Now Bill has come up with a breakthrough in the field which permits the best laboratory receivers to dig down another 30 db and come up with copy. Below is an extract of the information contained in the patent application, which should give you a good idea of the...

S

BIG WHEELS & HALOS 360- Cover** The omafing Big Wheel it q horitontally polarized, broadband. omnidirectional gain anipnino. h provide direcl 52 ohm coexiof feed. The omafing Big Wheel it q horitontally polarized, broadband. omnidirectional gain anipnino. h provide direcl 52 ohm coexiof feed. Model No ABW-144 Single 2 met** Big Wheel Model Ho. ABW-220 Single 1 V4 < eter Big Whe l 9.95 Model No. ABW 430 Single meier Big Wh*ef B 95 2 Bay iiocting K U availabk * T 4 Bay locking Klti a*oilab...

Ilov

A Output coupling capacitor tab C3, copper sheeting V f x and soldered in center to output coupling connector, h Plate line ceramic Stand-off insulator, V dia,. high, c Plate tuning capacitor C4 two required copper sheet 7 amp ft dia. round. .1 Plate line. T4 copper tubing 2n long. Plate feed point is H from tube end of line, c Input coupling capacitor tab, H x solder to input connector. Part of Cl. Copper, ft Input coupling capacitor tabt ffi'x 1, Other part of Cl- Solder one end to cathode...

Supply

3832 West Lisbon Avenue MILWAUKEE 8, WISCONSIN WEst 3-3262 VISET OR PHONE do not write -our branch stores they nave no mail order facilities C H J CA GO 31T ILL. Milwaukee Ave. Ft Off icy 3-1030 ORLANDO. FLORIDA 19 Azalea Park Sh. Centrr Phone 227-8231 IMPORTANT Be sure to send aH maiJ orders and inquiries to MILWAUKEE STORE, Dept. 7 3832 WEST USB0N AVENUE, MILWAUKEE H, W1SC. i year 2 year O 3 yt-ars T. T P T and want to trurto What's your deal Nil mc gt v . t P gt gt amp J - . e a Add ress ....

Riy

Tubes String

Ohm near enough to zero for almost any purpose. A typical regulator of this type is shown in Fig, 11. This regulator delivers 300 volts at load currents from zero to 100 ma, from a 450-volt dc source, its source resistance is only 6.1 ohms. The only critical parts values in this circuit are the resistors in the string from the 6080 cathode to the OB2 anode, which are chosen to provide a 25-ma bleeder load for the swinging choke in trie 450-vblt source. All other values are typical for this type...

Mpudyns Labs I

Write for your copy of THE AMPLIDYNE VHF LINE Distributor inquiries invited Top view. Power transformer lower right, transistors on front panel. Modulation transformer upper left. The two 6X4 rectifiers have been replacd with silicons. Modulator transistors are mounted on rear apron, allow spotting to be carried out without putting a signal on the air. Plus 12 volts is brought in from the accessory terminal on the ignition switch to pin 4 of the power plug, from there, through the on off...

N J

Lafayette Radio Electronics Corporation. 1H Jericho Turnpike, Syosset, L. L, N. Y. announces a new self-powered Variable Frequency Oscillator for the 6 and 2 Meter Amateur Bands. Model HE-89. Price 29.95 A high quality variable Frequency oscillator designed to operate with modern transmitters using crystal ocsillators in the 8-9 MC region. High electrical stability is achieved by a seriesregulator tube protects unit from line voltage variations. Illuminated plexiglass dial is cali brated from...

Communication Antennas

What was wanted was a method that would meet the following requirements 1 omnidirectional antenna systems at both ends of the link, 2 no tones or modulation of any kind on the control carrier, 3 control information constantly changing in an observation-ally unpredictable manner, 4 no identification of control carrier, 5 absolute frequency secrecy, 6 no continuous carrier control identification would be necessary , 1 fulfilling all the above requirements would constitute an absolute, unbreakable...

The Technical Materiel Corporation

VIRGINIA GARLAND, TEXAS LA MESA, CALIFORNIA SAN LUIS OBISPO, CALIFORNIA LUZERN, SWITZERLAND . POMPANO BEACH, FLORIDA For complete detailed specifications, request TB 1014A. This is a complete general purpose f J amp transmitter providing SSB, ISB, AM, compatible AM, CW, FSK and FAX modes of operation. Accuracy and resetability is 1 part in I08 per day with tuning in 100 cps steps from 2-28 mcs. Conservative ratings provide reserve power for maintaining peak power...

Why Buy Saxton Wire

Notice that no other wire manufacturer cares one whit check through 73 for any other wire ads . All good parts distributors carry Saxton wire and they should be rewarded for this loyalty a good parts distributor is defined as one who carries Saxton wire . No wire manufacturer has a more complete line of twin-lead and open wire line. The price is indeed right. Sure, you buy some twinlead that is a little cheaper, but try and get rf through it. You would do exceptionally well if...