Rtta

Rider, Shorecrest Spera 62 Subscription to 73 58 Texas Western Radio (San Diego) , 57 Western Radio (Nebraska) 62 73 SIDE8ANDER, Official organ of the Single Sideband Amateur Radio Association, 12 Elm Street, Lynbrook, L L. N, Y. Subs include membership to SSBARA 3 per year. Monthly. Primarily operating news and chitchat for the SS8 DX gang. THE MONITOR. Mar-Jax Publishers, 507 West Davis Street, Delias 8 Texas, 1 a year, 3 years for 2-50, Month , Largely operating ne s. Columns VL, Ciub...

Gmt

Brown K2JGY 60 New York Avenue West Hempstead, N. Y. The bands listed are MUFs and a higher band will not work for the time period listed. Lower bands will work, but not nearly as well. Times are GMT, not local time. These charts are to be used us a guide to ham band openings for the month of February, 1961 to the various countries listed, I will be interested to hear of vour results in using these charts and to know what other areas you might wish included in future charts. Advanced...

Antenna

With the low minimum value, the main dial calibration holds up whenever the bandspread capacitor is set to minimum capacity. Two multi-purpose binding posts were connected across the resonant tank of the wavemeter. These permit convenience in removing rf energy for oscilloscopic displays. They also provide a facility for connecting a stiff wire antenna and an associated loading coil for even better pick up. Just a three or four foot length of stiff wire has a pronounced...

To

Fig, 5 This four-component circuit switches time constants In the AVC line to make it suitable for either AM or SSB-CW reception. See tex+ -for discussion of Rl-Ct values and adjustment of attack and release times. Fig. 7 Audio hanging AVC gives fiatfesf possible characteristic for SSB and CW use. Audio is amplified in half of I2AX7, rectified to produce AVC voltage by IN34, and AVC rs gated to control bus by other half of I2AX7, diode-connected. The switch allows use of normal AVC circuitry on...

Columbia Electronics

4365 WT Pico 81 vd, (near Crenshaw) lot Angeles, Calif WE & -3731 Why buy elsewhere when COLUMBIA undersells Run, da not walk, to the nearest U. S. postal service depository and get the votes in for the articles in this issue of 73, List at least your first five choices as to interest. Winning author gets big bonus. You get nothing out of it but fervent thanks from said author and better articles in the future. -Rolling Your Own -Varicap Amplifier -Simplest Patch 2M Pip-Squeak -Squawk 6M...

Info

*EICO premDunts1 prewjres, pretunes1 and seals the ENTIRE transmitter oscillator circuit to conform with FCC regulations (Section 19.71 subdivision d). EICO thus gives you the trans-1 ceiver in kit form that you can build and put on the air without the supervision of a Commercial Radio-Telephone Licensee Most EICO distributors offer budget terms. COLOR & MONO DC-5MC LAB & TV 5 OSCILLOSCOPE 460 Kit 79.95 Wired 129.50 5 PUSH-PULL OSCILLOSCOPE 425 Kit 44.95 Wired 79.95 incL mtg. bracket Pat....

Comanche Sign

Controllable, illuminated sign that tells the XYL and guests you're transmitting. Cuts down background QRM. Can hook right into coil of antenna change over relay for controlled ON THE MR signal when XMTG. Heavy gauge all steel construction with handsome black or gray baked finish, Can be used on desk or tabletop or mounted directly on walL Dimensions 10 W long x 3Vs high x 3 deep. Specify desired finish in black or gray aftti operating voltage 6 or 12 VOC, or 110 AC. K Q -

Modern is

Pyle YBW70E 3-134 74th Avenue, S.E. Mercer Island, Washington Tuned-plate, tuned-grid transmitter of the 30s Grid coil on left, plate coil on right. Tuned-plate, tuned-grid transmitter of the 30s Grid coil on left, plate coil on right. Nkwcomeirs to the ham ranks take the variable frequency oscillator or VFO as it is popularly termed, for granted. If they have entered the field via the Novice route, a VFO is of course, 'forbidden fruit' until such time as they qualify for a higher...

Kchc

We have recently had occasion to try out a most exciting new tool addition to the workshop equipment of the ham who likes to build his own gear the ADEL NIBBLING TOOL. And it's just that a nibbler. Mystified Well you might be unless you're in the know, This tricky little device takes all the hard work out of putting odd-shaped holes in metal panels and chassis as well as in tubular metal parts within its generous thickness liimts. The nibbler will bite holes in sheet metal up to 18 gauge steel...

Electrcnics Division

525 MAIN STREET BELLEVILLE, NEW JERSEY It's Easy with this little rig Approximately two watts into the antenna Requires 6,3v at 2' 4A ___ and from 75-275 HV Only SI8,50 less power, mike amp tubes Crystals 8 for 1,75, Three hit two meters, four I lit six meters and one bits 220 inc. For further information see the article in this issue of 73 or write to us In the San Francisco Bay area call on Fortune Electronics in San Carlos or see lt 4 Dutch in Livermore on Main Street. Special Two Meter...

Lw

Kit price 37.50 39.95 W tubes amp xtal. 49.50 54.95 Both models n kii form have over 85 chassis Darts mounted and all difficult soldering com- pitted with explicii wiring instructions and photo-diagrams, Xtal osc, using low priced 8 mt xtaU, multiplier s , straight-thru final, two stage speech amp, push-pull modul t ors J LW-61 VHF Converters------------ 18.50 LW-80 Pre-AmpHfiers 12-50 Supply

Excello Electronics Presents

A New tow Price V,H.F Si Meter Transmitter wired and tested with tubes. The Excello Mark II Six Meter Transmitter is the lowest priced six meter transmitter on the market today. This is not a kit, but a complete unit, ready to put on the air with any power supply supplying 300 vT al 100 m.a. Meter I ndicator - Prov iding monitoring of Final Tuning, Grid Drive and Modulation, at a glance. Tuning Controls Tuning Controls ore all on the Front Panel. Access io Components Removable Enclosure gives...

Contents

Rolling Your Own Jim Kyle K5JKX 6 II We're determined that you're going to build something. Amplifier for Van cap Modulator Robert Baird W7CSD 16 More grain for the modulator in our October issue. World's Simplest Phone Patch J. Kyle K5JKX 6 17 Average construction time five minutes. Two Meter Pip-Squeak Ray Fulton K6BP 18 Cum gt kite phuiu- rig using only three fiCXH's. Cole W7IDF 20 Guaranteed Kuuser We should neeille Ken into writing more like this Six Meter K5JKX 6 22 For the car . ....

Hallikit Receiver

Features Covers afl bandst 80 through 6 meters tuning ratio, 25 1 high sensitivity sharp notch selectivity. Controls Tuning, antenna trimmer, cal. reset, function AC off, standby, AM. CW-SSB , band selector, cal, orvoff, RF gain, noise limrter, selectivity 8FO, audio gain, phone jack, S-meter adiust. SX-140 Kit complete with tubes 9495 wired and tested 10995 PRECISION PLANETARY VERNIER for exceptionally fine tuning Superb craftsmanship by Jackson Bros of England. Ball bearing drive, W di ....

Iax

Tp he absorption wavemeter has had numer-1 ous applications around the station. Its resonant circuit makes rather efficient use of radiated rf energy. An absorption wavemeter ran be calibrated rather closely frequency-wise and is not troubled with beats and harmonics like the more sensitive frequency meters. It is a fine device for checking-in the correct harmonic and for chasing down parasitica. The average absorption wavemeter can be made even more versatile with some minor revisions. Many...

Radio Bookshop

1379 East 15th Street, Brooklyn 30, N. Y. RATHER than devote half or more of 73 to the printing of news of interest to specialized groups we believe that it is our function to do everything possible to encourage the publishers o bulletins which cater to these interests. These bulletins bring you the news you want in far greater detail and in much less time than is possible in a monthly magazine where it usually takes two months for news to get into print. HAM-SWAP. Published by Ham-Swap Inc.,...

Surplus Buys

S,r meter-National- nJ illuminated 2 color dial to JOdh oror K-neu ......... .........................53,J9 Cwter ibtlamotw now tiipul ii vde output 405 v 270 ma const. for 59.00 Carter dynamotor nevr input 6 vjc output 250 v 30 ma twist- duly ..............................S3.95 2 for 7 00 RF meter In anlerma relay bo for ARC-5 see conversion Marcli VMyQ CQ BC41 box hl ..........S2.95 2 for 5.00 BC 733 UHF receiver 10 tubes iynara. CQ conversion for 2 or 6-clean ...............,........S5.95 2...