Hamfest

It's going to be a real old fashioned hamfest with fun for all, There'll be no admission charge, no donation and no registration fee. Come to the beautiful Monadnock Region of New Ham Shire to meet us and have a pleasant day with all of your ham friends. Clean out all of that useless old junk. There'll be no charge and no commission. A special feature will be part of W2NSD*s legendary collection for sale. Antenna measuring contest Prove that you can make (or buy . . ,) a...

Johnson

JOHNSON Directional Coupler & Indicator KNIGHT KG-4000A 1w CB Walkie-Talkie (pair) NATIONAL NC-98 Receiver & Speaker NATIONAL NC-173 Receiver & Speaker 9.00 369.00 549.00 219.00 449.00 419.00 135.00 750.00 20.00 149.00 39.00 44.00 149,00 44.00 65.00 379.00 199.00 119.00 199.00 129.00 10.00 119.00 109.00 209.00 139.00 369.00 49.00 19.00 2900 139.00 109.00 290.00 169.00 69.00 20.00 69.00 59.00 39.00 49,00 49.00 25.00 585.00 65 00 85.00 75-00 159.00 29.00 85.00 19.00

Cij

This little episode is being written while I am in Calcutta, India, I am feeling a little low today because I have just this morning seen mv sweet wife* Peggy, leave for the U. S, A. and I am really lonesome. I should be returning back to the AC lands next week where I have a transmitter and at least can get on the air. Right at this moment some fellow out on the street who sells gadgets to passers by is playing a very mournful oriental tune on a flute and he has been at it for the past 3...

Formed Section

Or the varactor so no power supply is neces- ary. The cost of varactors jumps up sharply for nput frequencies above 400 mc and powers ibove 5 watts. The PC-115 is 12.00 and followers up to 16 watts input a TRW Electronics 'formerly PSI) PV-002 for 16.00 can be used. recommend the PV-002 if you use the Hybrid 432 mc Exciter (March 65-73) which s a great rig. They are available through most nail order parts houses. Newark Electronics it 223 V. Madison St., Chicago, handles the varactor. Care must...

Two Categories To Choose From

Standard Duly Guyed in Heights of 37-54-88-105 and 122 feet Heavy Duty Self Supporting and Guyed in Heights of 37- 54 feet (SS) 71 88 feet (guyed) Ease of Operation roller guides between sections assure easy, safe, friction-free raising and lowering. Strength-welded tubular steel sections overlap 3 feet at maximum height for extra sturdiness ami strength. Unique ROHN raising procedure raises alt sections together uniformly with an equal section overlap at all heights Versatility designed to...

Io

Very successful Vhe shielding is just what triode mixers always needed, Grid-leak bias makes for easy idjustment and provides a detector test point for sweeping the rf, or tuning up on a signal generator. There was sufficient injection available 2,5 volts at the test point was found best to permit coupling quite loosely to the multiplier tank. The if output circuit and general layout are similar to the Tapetone converters, as in-terchangeability made the aforementioned...

Grace Spitz

XopL BEST Heck yes Warren ARA Rainiest t Aug, 29, Arrows from Rt. 534, Turnpike Warren Exit 14, Details WAR A Hamfest* Box 809, Warren, Ohio.________ SRT14 Synthesizer Modules . . UNIT 11C now available . . . Also Units 6 8,9,10,llAtllB, ALL New, Less tubes, With Schematic . . . S.OO each or any three 6.50 each. Also schematics any Unit, one thru twelve, Fifty Cents, nr full set of Fourteen 3.00, R1TCO. Bojt 156, Ann and ill e, Virginia._*_ WANTED All types. Military, Commercial,...

Broad Band Balun

Flat in the amateur bands from 3 to 30 Mcs, * Fu legal power Fully weather sealed Matches coax to antenna or balanced line. Improves efficiency and radiation pattern. Two models, 1 to 1 or 4 to 1 impedancc ratio Size 114 OD x 4 long. Wt. 4 oz. FUGLE LABS 1835 Watchung Ave., Plainfield, NX OUR GOAL TO HELP YOU BUILD A TV CAMERA Enjoy the fun of building your own LIVE TV camera. Most of the components can he fonnd right in your own junk box. We furnish only the hard-to-locate parts and...

Telco

575 Technology Square Cambridge, Mass. 02139 Phone 617-491-4050 is it possible that a single vacuum tube, a particular circuit or a certain ham could cause a big upswing in VHF activity Probably not but if we take the three and add them together just right the chances improve. Back in 1934 Frank C, Jones W6AJF, wrote a booklet called 5 Meter Radiotelephone' that little 25c paperback was the most complete treatise on VHF of its day and it triggered an outburst of VHF interest that lias not yet...

ANTENNA

Reflective Antennas Corner Reflector Trough Paraboloid Plane Reflector Backfire The VHF Antenna Handbook is your complete guide to VHF and UHF antennas. This outstanding book is by Jim Kyle K5JKX, one of the outstanding techauthors in the electronics field. The VHF An tenna Handbook covers complete theory and a practical details for every type of VHF and UHF antennas, A special feature is the commercial antenna catalog section. If you're interested in VHF, you should have this book. AMATEUR...

T

Looks as though Heathkit is determined to take over the ham SSB market. Their new HA- .4 KW Kompact linear is the smallest yet-and only costs 99,95, It's just 3-3 16 x 12-3 16 x 10 inches too. The HA 14 runs 1000 watts PEP to a pair of 572-IJ s on 80 through 10 meters, It even has a SWR bridge built in- The HP-14 mobile power supply is 89.95 and the HP-24 AC supply is 49.95. Find out more from Heath Box 73, Benton Harbor, Michigan. Here's something that we've all been looking for for quite a...

Unitized

International's new unitized VHF UHF transmitters make it extremely easy to get on the air in the 50-420 mc range with a solid signal. Start with the basic 50 or 70 mc driver. For higher frequencies add a multipiier-amplifier All units are completely wired. Plug-in cables are used to interconnect the driver and amplifier. The AOD-57 completely wired with one 6360 tube, two 12BY7 tubes and crystal specify frequency . Heater power 63 volts 1,2 amps, Plate power 250 vdc 50 ma. AOD-57 complete...

Fob

TS325-RIS 3325,00 T5435 RIS S-35.00 TS535 RIS 5535.00 Our Formula for receiver design Take the finest receiver on the market, modernize it, add a noise blanker, reduce it to about QSL size, add six meters and WWV, start building. The Davco transistorized receiver is the first receiver available to the amateur at an amateur radio price which is state oMhe-art in quality and performance. None of those hot fragile tubes to break and generate heatf none of those big if transformers for us our whole...

Drilling Template Shield S Sulkheao

Driliing template, shield and bulkhead. s 0.3 ma or 28 vdc bias can be used, ut 3.0 ma is required for full input and is ot hard to obtain. To set up the final, use a dummy load onsistmg of a 47 blue bead lamp and 1 turn coil loosely coupled to the final tank. Vhen resonance is established, increase the oupling if you desire, to obtain good bril-iance, and re tune all stages beginning with he oscillator for maximum lamp brilliance nd proper plate current to the final. Remove he dummy load,...

Ka Ac A I

Well, you can throw away those blowers ju've been saving. Amperex has developed new type of tube that is good for 270 watts itpttt CCS at 432 mc with no blower, ater, or wide open space. It uses a new induction cooling system that uses a heat sink gt dissipate power that doesn't go out the iedline. The number of the conduction cooled GX250B is the 8560. Amperex Power Tubes Hicks ville, New York, can give you more formation on this interesting idea. The Radio Vacuum Nozzle is a semi-flexible...

S

The club station for Aerojet-General Company's amateur employees owns Heath Sixers and Twoers which are circulated among members tn give them a chance to try VI IF bands. This got me on two meters building and checking out a Twoer' for W6IJK, Wanting something better than the Twoers superregen receiver, I b t a nuvistor converter1 to go with my NC-300, continuing to use the Twoer as the transmitter. The Sacramento two meter gang kidded me unmercifully for having a ninety dollar receiving saddle...

Wrs

MAKE YOUR OWN INEXPENSIVE MOBILE TRANSCEIVER WITH 2 METER MINIATURE TRANSISTORIZED TRANSMITTER amp RECEIVER BOARDS Here at last are complete transistorized basic transmitter and receiver printed circuit boards tested and ready for operation as you receive them. All that is required is mounting in a suitable container, such as a mini-box, supplying 12 to 15 VDC, a microphone or an earphone. Power Output V Watt CW minimum at 12.6 VDC, Modulation 90 AM MAX with single button 200 ohm carbon mike,...

Heaters

Antenna input is at right with neutralizing coil beneath airwound input coiL Oscillator is at top. If output is jack on left. ponents specified herein could be replaced with less expensive items, but in attempting to achieve an extremely low noise figure, it was felt that cost was secondary within reason, The converter plate when completed is screwed to the lip of a modified and inverted five by seven by two inch aluminum chassis. All wiring must be kept to a...

Lpv

Ton 3l vs ongle tangents of angles . the actual capacity required for this length of line to be resonant at 222 mc from Formula 4 . Xc 188 tan B 6.70 from Table 1 I 6 inches given maximum length from above Xc 188 tan 6,7 X 6 Xc 188 tan 40.2 Refer to Fig, 5, the tan of 40.2 is 0.85 Xe 188 X 0,85 Xc 159,8 ohms The capacity required for this X0 is obtained by referring to Fig. 4 on the 222 me curve and is 4.6 mmfd. Therefore, the total capacity required to resonate the line is 4,6 mmfd....

Info

Ci 1-8 mmfd miniature tubular trimmer. Co 3-25 mmfd miniature single section variable. Gj 3-15 mmfd miniature butterfly. Ci 3-35 mmfd single section miniature variable. K Original Swan relay. K2 12 v. relay from Motorola VHF equip. Li 10t. 24 e. closewound on Vi ceramic form. U 4t. 20 tinned on Va ceramic form, wound length of form with 2t. link of 22 plastic hookup wire on hot end. U 2t. link of 22 plastic covered hookup wire. U 5 5t. 20 tinned dia. Vi spacing, 1 1 4 long. L 30t. 30 e....

Imj

2,5-7.0 mmfd piston trimmer, ceramic trimmer may be substituted 3-3-15.0 ffimfd butterfly, from SCR 522, See text Four Fection, each 10 450, Sprague TVL 4760 Ll 18 T 30 E, Yi Ceramic form, Iron slug tuned, Miller 4000 Lj 5T r E, H Ceramic form, Iron slug tuned U 4 T 14, airwound, CT Lj 3 T 14, airwound, CT, spaghetti covered, in center of La Ls 4 T 14, airwound, CT, prune as required to resonate with Cz Le 1 T 14, J4 airwound, CT, spagheili covered, in center of Ls Ki DPDT relay, 5000 Ohm...

Oct

Block diogrom of 2 m, transistor transceiver my hours with no apparent damage to the be. The big disadvantage of this arrange-3nt is the short life of B1 and B2 which must changed alter about three hours of continu-is operation. By luck, these batteries are ieap and can be easily replaced. Signal from 1 is fed to Q8 which acts as grounded base nplifier. Q9 is the mixer operated common nitter with harmonic signal coming from 12, 1 he tuneable if is made of two cascaded ixers Q10 and Q11 with...

6ak5 Oscillator Circuit

Engineered to meet today's bond needs tomorrow's band changes, Mosiey Trap-Master to wor cf vWcfe DX. Yes, now is the time to add the finishing touch to your station Trap-Master by Mosiey. Consider TA-33, the supe rior quality beam known and respected -by thousands of Hams throughout the world. TA-33 easily handles 1 KW AM on 10, 15 and 20 meters. to 8 db forward gain 20 db. or better front-to-baek and 1.5 1 or better SWR. TA-33 features the original all metal encased traps, proved to last...

Semiconductors

H. The first item this month is a slight goof last month. The 2N3478's are NPN, not PNP as shown in the schematic. The polarity of the supply voltage is shown correctly. Because of delays in getting the transistors and being sidetracked on other matters, I am not ready to report my results on the 2N3478 converter J built. However, WlOOP, who is accepted as the converter man in these parts, has been working extensively with 2N3478's and reports that lie is...

Kick Yourself

This General Radio heterodyne frequency meter and crystal controlled calibrator is one of the best surplus bargains you will ever see It comes to you all ready to plug in and use, Absolutely no conversion whatever is necessary, t is ideal for the ham shack . , or for any commercial lab. The range is from 160 kc to 30 mc with direct calibration and up to 120 mc with harmonics. This is a secondary frequency standard and frequencies can be read to within a few cycles on the meter. Voltage...

Wesgrove

VKR-500 Kit Form AN Prices Above F.O.B, Boyonne, N. J. For Full Information Write to R- A. FjE NT ER PRISES Oept, H 32 EAST 22nd STREET BAYONNE, N. J. 07002 ot D'i rbufori for Brutal Electronics, frrgfofld Compfffi Jine of Vicf UENERAL PRECISION laboratory interlaced TV cam- ra, 6198 vidicon, 75 ft. crank-up tower, ART-2S, VHF H6B preamp, 432 mc 20 watt SSB and TV transmitter, ilCO T30 modulator, Ameco nuvistor 220 mc converter, 20 mc Big Wheel, Blonder Tongue UHF converter, 5 dement 6 meter...

Cush Craft Antenna

YOU WILL HAVE A SIGNAL THAT REALLY RADIATES WHEN YOU BUY CUSH CRAFT . . . THE ANTENNAS WITH A PATTERN OF FIRSTS IN AMATEUR COMMUNICATIONS. 5QUALO a half wave, horizontally polarized, omni-directional antenna. Outstanding all around performance is achieved through a 360 pattern with no deep nulls. The Square shape allows full electrical length in compact dimensions. Direct 52 ohm Reddi Motch feed provides ease of tuning and broad band coverage. The 6 meter Squalos are completely universal for...