Info

Ilun ting-Fishing-Diving Stamps-coins Photography Astronomy Animals Boats < kibs Masons-Rotarv-etc. Boy Scouts Languages Stock Market VFH-moanl > ounce-scatter CD, RACES, etc. Ham TV, RTTY, FAX, FM Arts music, painting UFO Net, The DXers should, I suspect, be first. It might just be helpful for DXing to have a channe to check for latest news and QTH's. It is a lot more fun to hook something rare if you have an opportunity to tell the other fellows about it and offer, solicitously, to help...

Televerter Flying Spot Scanner Tv Camera Construction Manual

T n 72 pag* iref mai'-Jal c o-en(a ji-. cc firto drills (a kliiir.g cn unv if flyJn ipti ic& rn i t pe ramirij njJable ia lelimicij 35wn sSidti. The uitil ii eo , ' v.i economical mld *H - * mate* List af a iFgnd ra TV ser Tc provide The j'-- - c11 J ABSOL TELY MO WiRtNG MODIFICATION cr* tewired 0r h--TV ie + . PriT-jnr-. fcrtly J tubfi plui fJitfOirgItipiiBf, Ofdtf TV-1 L5D P CAiVE A CONSTRUCTION PLAN SrlJ ofear o Fartttnng and i rd*f fj ctr dard li ed ugjtal ii fesy.Ted- No Itt xien,...

Iiov Ac

This autostart circuit is versatile in that it connects to the speaker instead of digging into the TU, is solid state and therefore small, and can he hooked up to turn on the teletype machine and TU power, rhe power supply requirement is +24 to 28 VDC at 10 mA no signal to 200 mA with signal, I his autostart was designed originally for monitoring USAF MARS VHF nets where both voice and teletype are used. Many stations operate on VHF and HF SSB simultaneously. With this device it is not...

Solid State

NOW a Competitively Priced Receiver for the most exacting Phase-locked Frequency Synthesizer for Maximum Stability Designed for the exacting requirements o f laboratory, broadcast and HF monitoring and point-to-point complex system communications9 the R-530 is an advanced solid-state communications receiver. Its unsurpassed performance is the result of over three years of exhaustive research- It receives selectible Upper and Lower Sideband, CW AM and RTTY signals. *. provides accuracy of 1 KHz...

Howard W Sams

Advanced amp Extra-Class Amateur License Handbook by Howard S, Pyle, W70E. Provides all the information you need to obtain your advanced or extra-class license. Makes preparation for these top licenses far easier for present holders of lower licenses, includes sample questions for each exam- 192 pages, 20649, General-Class Amateur License Handbook by Howard S. Pyle, W70E. A complete guide, including typical FCC test questions and answersf to help you prepare for the Technician, Conditional, or...

Pcm

Dial with 22 inches of scale for a dial accuracy of plus minus 200 cycles. Sensitivity is better than 0.5 microvolts for a 10 db signal to signal-plus-noise ratio. The HQ-215 uses 26 silicon transistors, 13 diodes and two zener regulators, It is supplied with one 2.1 kHz filter and has provision for two more. Price is 529,50 with a matching speaker at 24.95. For further information write to Irving Strauber, W4KXD, Hammarkmd Manufacturing Co., Mars Hill, North Carolina 28754 Modern electronic...

Fone

Is possible to zero beat well below the audible beat You may also check your own line frequency by watching the 600 Hz note on WWV. You'd be surprised how poor our 60 Hz line frequency is. In addition to the nine described above, a modification to the pan adaptor will add to the uses to which it may be put. On my HalHcrafters SP-44, I have made modifications to the circuits so the cathode-ray tube may be used for multi-purposes. A four position switch was added and the following uses were added...

Vere

6 The Suppressor Compressor 12 Putting the HW-12 on 160 Meters With the new rules this is important 16 Tuning a Parasitic Beam 22 Does Your Linear Need Help 24 Some Thoughts on Voltage Control 26 Solid State Monitoring 28 The Two Meter Transistor Transmitter Plus one tube . . . 32 The Yasme World Wide DXpeditlons 38 The LC Power Reducer 42 Why Ham RTTY 44 Panadaptor Spectrum Analyzer W6DTR 48 The Six l l 'l 1 -a-a p -m -w - a i j-j-j. -sm m ai-s.a. a m. a. 4. a. m. m. V - m. -m. m. m. m. lt m...

Staff

Cover Photo Clarence Synder W3PYF has superbly stated the need for CW for the Amateur Extra License December's cover did not have full credits The equipment shown is as follows Amphenol Model 870 Millivolt Commander, McCoy 9 MHi filter and crystals, a variety of Amphenol connectors. The doq and Santa were constructed almost entirely of Amphenol connectors and sockets by John Gove. The Transceivers are readily identified. errors found in this maqa-line are put there deliberately We try to pu...

J

And Vs must he of same frequency sine-wave output to preserve An earlier article1 by Jim Kyle, concerning adjustment of an ac line voltage by the Boost Buck system, prompted some further thought and experimentation along a similar line. Although the underlying theory of the system described by Kyle simply involves vectorial addition of two ac voltages of the same frequency, there is some tendency to confuse it with the system of Fig, 2, The Iboost-buck system explained in Fig. 1 is often used...

Antenna Stuff

Per 100 feet 4.62 300 ohm open wire. Per tOO feet 4.29 Standoff-Masl or Screw-In 19 18 Copperweld. Per 100 feet 1.09 14 Copperweld, Per 100 feet 2,74 12 Copperweld. Per 100 feet 3.79 14 Copper-So, id. Per 00 feet 3.95 12 Copper-Solid. Per 100 feet 5,26 Times T4-50 L Loss 8 J. Per foot 18 Times 15-50 L Loss 56Ut Per foot 10 Times Solid Sheath Alumafoam in stock Kits with connectors 50 100 ft Gfass Line-guy wire. Per 100 feet 500 lbs Test 3.52 Glass Line-guy wire. Per 100 feet...

Military Electronics

24 PAGES crammed with Gov't Surplus Electronic Gear the Biggest Bargain Buys in America It will pay you to for your copy Refunded with your First Order BC-G45 TRANSCEIVER, tubes, 4SJ to fillO Me. Easily jiiluuted fur 2 way volut or rodu on Ham, Mobile. TiUvision Kxiiojlim ntaL ant CUkeas' limn Is. With tubes, U s paurr supply in fatlor cartort qk Brand new 5 lt gt i35J SPECIAL PACKAGE OFFER UC-ti45 Transceiver, D gt namotor and all accessories, including mounting 1'IIF Antenna Atf amp tinbUcs,...

Xtal Socket

It takes approximately 25 to 30 minutes to etch, depending on the strength and temperature of the solution. After the PC boards are completed, drill all holes to take the components and solder them in place. The Miller if strip sells for less than 6.00 from Allied Radio. The Miller part number is 8902-B. The transistor driver and output transformer are the standard run-of-the-mill transformers. Almost any of the electronic supply houses have them. The power transformer is...

Post Office

Fig. 1 The pre wired circuit of The module The Heathkit Model SB-610 Monitor Scope is a convenient instrument for use with an amateur radio station to monitor on-the-air signals. It can also be used to monitor radio signals from other stations when used in conjunction with a receiver . . or so says the Heath instrument manual And the statement is certainly true also, as easily accomplished as the manual indicates when the application is to a vacuum tube receiver's if strip. Try it with a solid...

Th Edition Of The Famous

W6tns New Sideband Handbook

Tells how to design, build, and operate latest types of amateur transmitters, receivers, transceivers, and amplifiers. Provides extensive, simplified theory on practically every phase of radio. All original data, up-to-date, complete, 848 pages, -167, only by Robert M, Brown, K2ZSQ W9HBF. Completely updated handbook incorporating the finest material on vital vhf subjects from the rare back issues of the famous VHF Magazine, plus new data of great interest to both old and new vhf men, 160 pages....

Signal Tracer

350 Signal Tracer

This solid state signal tracer will make servicing of your receiver. AM FM and TV very easy. Comes complete with shielded prod and clip cord. Self-powered. Six transistors, four diodes and one thermistor. Built in speaker and 200 uA meter. Attenuator 20-4060 dB, Gain over 70 dB, Outputs for 8 and 600 ohms. You can track down the trouble in a receiver in minutes with this little unit.

Minilab

Here is a complete test laboratory all in one package A modem miracle of electronics, This one unit contains an AC-DC Voltmeter 50, 150, 500 volts 0-500 mA 10K, 100K, 1M ohms resistance and capacitance substitution 9 vdc battery supply RF Signal generator 455 kHz and up to 700 kHz plus an audio generator at 400 Hz. You can service just about anything with this lab. You can signal trace and align receivers and trace audio systems, speech equipment, hi-fi and tape recorders. This is probably the...

Motorola Fm Equipment Schematic Digest

91 pages I HA x 17 of schematics, crystal information, alignment instructions, service hints and specialized information. 3.95 post paid. 1100 Tremont Street Boston, Massachusetts 02120 RI3B Command rc r 108-i i2 mc AM, 9 tube, 3 uv sens. No dial we fcive knob, tuning gfiiphj tccli data. Needs pwr sply amp controls us other Commands. 27 SO 1 R22 Command rcvr 40 to ltibo kc, with ktwb amp tuning eraptl amp tech data, grtd OK 17,95 R23 ARC-5 Command rcvr 190-550 kc lias dial w knoh amp teeb da a,...

Radioteletype Equipment

Teletype Models 35, 33, 32, 29, 2K ASR, 28 KSK, 2H LPR, 23 LAKP. 28 LXD, 28 LBXDL 14, 15p 19, Page Printers, Perforators. Reperforators. Trans-Dist. polar relays, tape winders, cabinets, Collins Receivers, S1J4, 51J- P R-388, R 390-A R-220, SP600JX. Frequency Shift Converters, DC. Power Supplies, Box 19, Boston, Mass. 02101 Tel 617-742 0048 Want to keep up to the minute of what's happening DXwise Subscribe to Gus Browninq W4BPD s new weekly DXERS MAGAZINE. 24 pages of DX events, coming up...

Transistor Dc Supply

This power supply will operate transistor radios and other devices under repair or where batteries are a drag to replace. Voltage range 0-20 vdc continuously variable. Meter ranges 0-20 vdc, 0-20 mA, 0-200 mA. Maximum current capacity 150 mA 20 v or 200 mA 10 v. Pilot lamp. AC ripple less than .25 mv rms. Fused. Has built in power transformer and 30 watt power transistor Built for continuous duty. Exc ept for moon bounce and satelitc communications, one rarely hears or reads of the VH activity...

Renewal Code

The two num be rs u nd er your call on the address label are the expiration code. We have tried to make it simple. The first number is the month that we send you the last copy on your subscription and the second number is the year. 78 would be July 1968, for example. Your ad in this space will reach 65,000 paid readers an honest Figure . Plus all their friends who are too chintzy to buy their own copy. Call or Write for Ad rates today 73 Magazine Peterborough, N.H. Ken W. Sessions, Jr. K6MVH...

Vidicons

Prices and Quality have never been better The quality brand-new Toshiba and Hitachi, fully guaranteed in factory sealed cartons. Hitachi 7735-A Toshiba 7038 H vidicon 29.50 Hitachi separate mesh vidicon 8507 74.50 Replacement vidicon for Sony and Panasonic 7262 29.50 All vidicons sold in lots of 5 10 more for lesser quantities . Act today. These prices apply for a limited period. Write for GBC's free Encyclopedia of CCTV equipment. GBC Closed Circuit TV Corp. 74 Fifth Avenue, MY 10011 212...

Order Today

Vackar Vfo

The only low priced IS 12 C 1L2M, 12M Q iy dc mA .05, 5. 50. 500 dB 0, 14, 28, 34, 40 dc volts 2.5, 10, 50, 250, 500, 5000 ac volts 10, 50, 250, 500 lK volt No taxcs anywhere Plus 901 shipping If you have constructed a circuit arid it doesn't work, maybe there was a mistake in the article. That does happen, and a good exercise before Starting anything described in any magazine is to read slowly through the schematic looking for a mistake, Here are some examples of mistakes appearing in 73...

Swan Full Coverage External

Complete A,C supply for 117 volts, 50-60 cycles, ift a matching cabinet with speaker, phone jack, and indicator light Includes power cable with plug for transceiver, and A C, line cord. Ready to plug in and The Model 508 Frequency Control Unit is designed for full coverage of 80, 40, 20, 15, and 10 meters. It provides for transmitting and receiving on separate frequencies, and plugs directly into the back of the 500C A separate Duai-VFQ adaptor ts nt longer required, since the relay control...