Variable

TVI giving you trouble Does your peanut whistle wipe out local channels just as if it were a kilowatt Or are you maybe in the process of planning that next rig, and want to avoid any problems with the Tennessee Valley Indians Hundreds of thousand of words have been written on the subject of TVI but very few of them have really brought out one point which is of special interest to the VHF-minded ham who happens to live in a semi-weak-signal area (and this includes almost every place in the...

Electrical Specifications

TRANSMIT Frequency Any preselected 500 KC segment between 497 and 52 MC (50,0 to 50,5 supplied unless otherwise specified). Power Ratings 85 watts P.E.P. input all modes (AM, SSB, and CW). SSB Performance (9MC Crystal lattice filter) Unwanted sideband down more than 40 db+ Carrier suppression greater than 50 db. Distortion products down more than 30 db at full ratings. Frequency Stability less than I KC warmup drift after first five minutes. Less than 100 cycle hour drift after 30 min. warmup....

Double Male

SjIVCT plated DOW-KEY COMPANY, Thief River Falls, MiniK and presses the on T button. And like the housewife, when the washing machine breaks down, the appliance operator calls the serviceman I believe, to our shameful detriment, the true radio amateur is rapid ) being drowned in a sea of appliance operators. This new species of nonradio amateur is a talker par-excellence, lit- collects certificates, joins the local radio club, joins round-tables, earns awards and is...

Qtl

May become so severe as to tighten every muscle in the body and may throw the victim from his deadly position in contact with the wires. However, it is likely that the damage to the heart controlling nerves would have al-readv been done and death would still result despite the fact that the circuit had been broken. The severity of the damage always increases with the length of time the body is in contact with the circuit. This is due to the blistering and burning effects at the points of...

Si

Johnson Valient Xmtr 279 Johnson Viking 1 Xmtr 89 Johnson Viking 1 Xmtr Johnson 6H2 Xmtr package incl VFO, Mod amp PS. 179 Mostey CM1 w sp. 109 Nat' HR050 Rec Nat't NCI 88 Rec S79 Nath B amp 2 M. Converts in Natl cab 59 NaVI NTS-3 Sp New reg 19.95 Regency ATC- xstrized mobile conv. 39 RNlE DB23 preselector 29 RME HFt0 20 conver-ior covers Swan SW175 Xcvr w to pay dc sup used S235

VQ

Type 83 JHF conncc-tors for direct to equipment installation, accepts one PL 259 and one SO-239 BLITZ BUG is the only USER PROVEN full time COCtttial lightning arrester. It is a precision engineered electronic component, machined from solid brass tubing, and silver plated throughout for maximum conductivity. A sealed air chamber with three discharge points provides constant static drain off to greatly reduce chances of a direct lightning slrike. n many cases the Blif flvg will eliminate staiic...

New Dkb Transfer Switch

DK2-60B with UHF Connectors . 9-00 Dei gnta to meei iwitcHng need when liiing transceiver eiciter to dtivC any linear amplifier. Perform necessary switching to transmit directly wifh traniceiver or to tramait with transceiver amplifier combination. SPECIFICATIONS Freq. range 0 to 500 mc. to J kw VSWR 1.15 1 liolation 30 db at 500 mc, 50 db at 30 mc Imertion lo s 0-03 db at 30 mc Available in fill l d. AC and DC voltages Con nectori UHF i d.t type N BNC. TNC and C available.

J

The accompanying diagrams depict the arrangements used by the authors, and you may improvise any arrangement required to suit your space requirements, so long as you keep it balanced. If you will utilize a little care in making good electrical connections and in insulating the feed line, it will put a signal on the airways that you can he proud of. One word of caution is in order Since the conical presents such a good load and pulls all the rf available from the...

Wrl Spire Spaulding Towers

If your tool box is at all like mine, it is most difficult to explain, and further, it doesn't even faintly resemble the surgically precise list of required tools in the ARRL Handbook, chapter 011 Construction Practices W hat a dreamer the fellow who complied that list must have been Among the indispensable tools is listed an item I believe they are used in tool rooms called a center punch, A friend of mine told me yesterday they are used to mark the place where a hole is to be drilled. Ever...

Wayland Mass

The crystal-multiplier minibox is shown bolted to 46ADT chassis. OB2 regulator tube can be seen as welt as crystal. The tripler to 418 mc using the 2C5 1 tube is behind the mixer pot and can not be seen. The 1st and 2nd rf amplifier coax pots are from right to left. The input and outputs of the pots are on standard coax UHF plugs and can be jumped os desired. ond rf cavity stages are unchanged from the original. It may be necessary to adjust the series dropping...

Living With

Every so often in the various radio publications there appears an article about an SWR meter or an rf power meter. Such an article did appear in a recent issue of 73 Magazine. In practically all of these projects the use of a meter having a 0-1 scale is prescribed. The meter itself may have a 0-1 miliiampere or perhaps a 0-100 microampere movement. For the purpose of checking SWR a calibrated graph may be included with the article. More often, however, even this time saver is omitted and it...

Wretched Kpmm

One of the big problems at iiamfests and club meetings is to have everyone plainly enough marked with their first name and call. All sorts uf stickers and pieces of cardboard have been tried, plus little cards which can be typed up and stuck in holders . . . all have the same problem they are hard to read from any distance. Hie best answers to date are these engraved laminated plastic name badges which can be read by Cousin Weakeyes from seventeen paces. You are in luck. We've arranged to make...

Home Of Vhf Progress

Hickory Ave. Midland, Tex. and T. 0. Wallis WA5DEL 2602 Sentinel Midland, Tex. Would you like to get away from your antenna farm with a separate antenna for each band, and operate on all frequencies from 80 meters through 10 meters with one antenna that will load flat with a 1 1 SWR all the way across each band The accompanying diagrams depict such an antenna. Dubbed the All-Band Conical and derived from the driven elements of a broad-banded television conical...

Ez Way Aerodynamic

Design decreases wind load and provides telescoping action that permits raising and lowering of tower sections, CRANK UP TO 60 FEET, DOWN TO 25 FEET and TILTS OVER FOR ACCESS TO ROTOR OR BEAM. every E-Z Way Tower, Heavy wall ste l fubing legs, continuous diagonal bracing of Solid Ntael rod and electric-cally welded t hr augho ut , n o loose bolts or nuts here, E Z Way design and strength are your assurance of DEPENDABILITY that you can count on year after year. See your nearest distributor...

M

A The installation at W5VOH, he spreaders ore made of one inch conduit with a one inch dowel driven inside the conduit and protruding a foot on each end. A pulfey on the mast makes it possible to raise and lower the spreaders. Both masts are of the TV telescoping variety. forming each cone 011 each side of the center feed-point and the same optimum cone angle of 30 , the Z R ratio is only reduced to about 6J2 L It is important to note that when Z R is at a minimum, the ratio of Rmilx to...

Featuring

If The new Inducto-match system if The W6SAI compact three element beam if Inexpensive wire beam antennas if Design charts and SWR curves for 40, 20, 15, 10 and 6 meter beams Completely revised and brought up to date, the new Second Edition of the W6SAI Beam Antenna Handbook covers all details of antenna, theory, construction, installation and adjustment. New, simplified designs. Complete drawings and photographs of rotary beams you can bui d. How to evaluate your antenna VHF HANDBOOK by Orr,...

Mx Laboratories

Job of using what little space was available. I lie power supply for the 9 volts of bias was also crowded in beneath the chassis. The unit contained a fixed resistor rather than a potentiometer for R8 but is otherwise identical electrically to the circuit diagram and the other units. The performance of the unit was excellent but the possibilities for mass duplication were small indeed The next step was a lengthy conference with W3ITO, who during the normal daylight hours spends his time...

Denson Electronics

Hams quickly discovered that a big frequency gap separated 200 from 1600 meters. Setting up good 1600-meter installations required plenty of hard work and sweat. But with concentrated effort, skylines in the selected cities and towns changed practically over night. Above the theatres and halls acquired for the presentations, long multi-wire antennas swayed between distant supports. Inside, amateur equipment looked different too. Converted receivers lay burdened beneath large honeycomb loading...

Laboratories

TELEPHONE 627-6800 Clegg Laboratories, well known for high-performance VHF equipment the Zeus transmitter. Interceptor receiver, Thor 6 and 99 er 6 meter transceivers has recently become a division of Squires-Sanders, Inc. Amateurs mieresicd in VHF will find that this means a vastly belter Clegg as the result of excellent technical support and financial backing, plus association with a company whose entire interests center upon superior amateur communications equipment....

Jf

Simple matter to move the saw forward and cut with one end of the blade which still has teeth, I hope the beginners among us are taking heed so they won't be taken in by zealous salesman at the hardware store. New tools aren't alwavs the best tools The best scriber for marking lines on chassis is an old ice pick I saved from the 1930's, Remember the cards we used to put up in the window to tell the ice man how much icc to bring in that week Long-nose pliers would be nice, but it is felt diey...

Info

Write today for free literature on our VHF line tiiiI hiPA tvw OR niflt'tnn rii gt iTAn SCR 522 Transceiver Z meter or 2 0 10 on Trans, complete with tubes and 4 tandom crystals L N 19-95 R4 ARR2 Versatile Receiver New 4,05 BC 929 Scope ID59 APAH Scope BC 375 Transmitter less T. U. Esec. 12.95 RM 52 Phone Patch . . SA 325 U Coaxial Switch See Aufc. 73 ____L N 7.95 RTTY SS8 Etc. etc. Versatile Multimatch Transformer al amp o plione patch T. New t98 BC 433 B C Band Ree. 400 cycle . Bsc. 9,95...

Kwm-2 Waters Notch

Tuning gives you 20 to 1 tuning ratio in your KWM-2 2A, EVT is a stable, solid-state varactor tuning device that attaches to your PTO without wiring changes in a matter of minutes. Precise, siow-rote tuning in the TRANSCEIVE mode makes small frequency changes easy, especially when mobiling in traffic, Tuning range is 500 cycles from any setting of the PTO, EVT operation is controlled by a specially shaped potentiometer on the front panel and is equipped with a push-pull IN-OUT switch. Built-in...

FIGURE

Could be shown to lie better on paper. However, other problems can be present, such as undesirable feed-thru from strong local 50 or 144 mc stations, his can be difficult to eliminate especially if the 432 mc converter is fed into another high sensitivity 50 mc or 144 mc station converter, thence into the station receiver. The terrific gain an dthe various beats from the conversion oscillators may well nullify the higher if advantages. It also ties up the 50 or 144 mc station converter at the...

Poly Paks

Punch 6 popular hole sizes with one punch ,. ocfals, 9-7 pin, phone Jacks, pilot lights, etc. Easy to use-no turning, twisting or vise required. Sizes l a I hardened dies and punches for long life. Pfated to resist rust and corrosion. 14 pes., packaged in handy storage tube. Wgt, ZVi lbs. Amateur Net 54.98 U.S.A. blows hurt Dempsey. He sagged back and his left leg stiffened when the second blow landed. The furious pelting left him dazed. Carpentier followers, feeling victory, yelled...

Corrections

Considering the number of possibilities for errors we didn't do too badly. Hallicrafters reported a rash of orders for their 2650 FPM-200 which we put in for 26.50. believe the price on the 200 is back down to 1995 now, in case the high price was holding you back. W orld Radio got a shock when we rated their Galaxy 300 at only 200 watts PEP. Since they went to an awful lot ot trouble to have the rig develop 300 watts I can see their point. The Galaxy 300, for clarification, is a 300 sideband...

D

This new GPR-91RXD Communications Receiver has all of the features selectivity, sensitivity and reliability of our GPR-90RXD receiver. AND IN ADDITION has 15 kc bandpass for ISB reception of four discrete voice channels or up to 64 teletypewriter channels, when used with our Model SBC-2, Sideband Converter. Two of these receivers, with common oscillators, such as TMC Model VOX-5, see line illustration at left make one of the finest diversity receivers available on the market today. Our...