Division Of Aerotron

C. 27608 The parasitic suppressor works by concentrating any stray inductance or capacitance which might form a parasitica load impedance into a known location, and then loading that impedance down with such a low-valued resistor that its Q is far less than unity. If, despite parasitic suppressor you suspect that parasitics are present in a rig, perform the same test as for self-oscillation except that normal drive signal can be applied. Output at any except the...

Stellar

As a barefoot mobile unit, the American-made Galaxy FM-210 runs a full five watts of power. Just connect it to your antenna and clamp it under the dash-then plug in a high-impedance mike and you're off and running . . . on three crystal-controlled channefs The receiver section's FET front end gives you unmatched selectivity and sensitivity. And the transmitter's husky signal gets you through even in those dead spots ' If the nearest repeater is in the next county-or if the activity in your area...

P

Just opened the 2-meter repeater cabinet, getting ready to replace the final tubes. The antenna fastened to the brace he is standing on is a 450 MHz business rig. The upper left antenna (looks like it sticks out of the beacon light) is the receiving antenna for the repeater. At the lower left, the transmitting antenna is a few feet out from the tower. The antennas for the 6-meter repeater are not visible they are side-mount types, mounted on the far leg. Several 450 MHz log periodic beams are...

Info

The Radio Ranch repeater (146,32 to 146.70) in The Los Angetes area has a wide range of coverage with a pattern shaped like a wedge. Terrain features make limits sharp, so that signals droji off suddenly, regardless of mobile power and antenna type. County, parts of Riverside County, and southern third of San Bernardino County, Eievation 3000 ft. Separate receive and transmit sites. 35W out. User must whistle 1750 Hz) to activate repeater initially carrier-operated unless input channel vacated...

Top Prices

1966 HILLVIEW STREET, SARASOTA FL 33579 955*7161 ANSEL E. GRID GRIDLEY, W4GJO both meters to start with a high series resistance and a high known meter scale. Once you know what you have you are in a much better position to put it to use. ihe meter must now be disassembled commonly, this is done by removing three screws around the rear circumference of the body or two screws on the back. T he holes may have been sealed, in which case the sealing compound must first be removed. Slide (he...

To Try For Your General Class Ticket

STUDY INSTRUCTION LEADING to GENERAL ADVANCE nd AMATEUR EXTRA LICENSE This co-ed Amateur Radio Camp, Y.M.C.A. owned and operated, can accommodate 60 campers. There is no age Limitr We have had campers from 7 through 74 years of age. It is very helpful if you can copy 5 wpm or have a Novice or Technician ticket, but tt is not necessary. Time is divided between radio classes in code and theory and the usual camp activities, such as swimming, archery, riflery, hiking, etc. Golf privileges are...

Radio Amateur

III. 60044 There are both mechanical and electronic megohmmeters. The former type uses a hand crank to turn a dc generator and it incorporates a special differential meter movement. New instruments of this type are somewhat expensive but if one can be found on tlie surplus market, it would certainly prove to be a complete, self-contained test unit. Three terminals will be found on these instruments, labeled ground, line, and shield, as shown in Fig. 3+...

Ham Fee Hikes Planned By

The FCC is holding up a glistening shaft on which it hopes to impale virtually all of the radio services. In response to a suggestion from top government officials, the Commission seeks now to increase the fees of license applicants as an attempt to balance a projected 1971 budget. Hardest hit by the move will be the broadcasters, whose lobby will doubtless resist the action with all the force it can muster. But the amateur service, with no protecting arm in Washington, will be at the mercy of...

Illinois

W9ZND (Waukegan) 146.46 146.88 Central Illinois WA9GCK (Bloomington) Whistle-on system 146.34 146.94 WA9EAM (Petersburg) 146.34 146.94 WA9EAT (Joliet) 146.28 146.98 Chicago and vicinity WA90RC (Chicago FM Club) 146.34 146.76 1800 Hz tone burst for northside receiver 2 kHz for southside receiver. Wideband. Timer limits transmissions to 2 min. Two receiver sites. North side tone burst requirement is 1800 Hz. South side burst is 2000 Hzh Coverage includes Waukegan, La Porte, Indiana, Wheaton,...

Saroc Draws Record Crowd

Several thousand amateurs surprised Las Vegas townspeople (who have learned to accept the unusual) hy showing up en masse for the annual SAROC funfest and third annual FM convention, The turnout this year exceedetf thai of ait previous meetings jn spite of the fact that it was held in a new hotel (the Stardust instead of the conventional Sahara), and a record number of rooms were occupied by convention attendees. Highlighti ng The convention were daily ' cocktail parties sponsored by Ham Radio,...

Prestel Field Strength Meter

A Gold-Mine for Antenna Installers Frequency Range 40 to 230 and 470 to 860 Megahertz, Calibrated outword from 10 to 50,000 Microvolts. Nothing makes it easier to properly arid speedily find the correct place to install TV, FM and Communication Antennas, You can measure and hear the signals with this volt battery economically pqwered 548 Broadway, New York, New York 10012, Rhone 212-926-6000

Linear Amplifiers

In almost all eases a cure can be effected simply by removing the cause of the trouble. This may, however, in the case of some forms of distortion, amount to a complete redesign and rebuilding of the modulator. Let's concentrate on some of the simpler troubles for a start, and leave redesign of the equipment until some other time. I o cure the troubles evidenced by downward modulation of antenna current, or by downward fluctuation of the final plate current meterf try first increasing drive to...

Staff

Jeanne Caskie Nancy Estle Bruce Marshall Jane Tracey Joan Bernier Whitney Tobias 17 A Noise Blanker That Works W8RHR As opposed to that crummy one in Brand X that doesn't work, And can be added to your present receiver easily. 20 Hot Carrier Diode Mixer Converter WAGNCT This is not at Apr if Fool article. 28 Examining FM Repeater Operation WB6DJT History of repeaters, ARRL involvement, and iegal problems. 34 A Repeater Tone generator, timer, identifier, the lot. 41 Understanding the Carrier...

Xah

Hustler Bblt

More than twice power gain is yours for the asking Get the Model BBLT-144 with Hustler's proven quality and the only wavelength mobile antenna supplied totally ready for installation and operation. Easy installation on lip of trunk. trunk lip i01 . All cables Overall height is 48. Complete with 17' RG-58 U and PL-259. Amateur net 34.70. Model BBL-144 Same specifications as BBLT-144 for installation on roof, deck or fender in hole. Installs on roof without pulling cars' header. Amateur net...

Ham Hospitality

NEW YORK - Dana Polan WA2JLV offers overnight accommodations to Stateside and foreign DXers. Write to RFD Box 44A, Putnam Valley NY 10579 or call 914 528 3759. Richard Hk Eck house, Jr WA2CVL also offers overnight accommodations 87 Lincoln Road, Amherst NY 14226 NEW HAMPSHIRE Jean Pierre Catala F2BO W1 welcomes one or two UTS, or DX hams for overnight stays. Accom modations are modest couch , but languages are no barrier if you speak English, German, or French, Address HT Forest Park, Durham NH...

The Denson Electronics Corp

BOX 85, LONGVIEW ST, 203 - 875 5198 ROCKVfLLE CT 06066 many different versions of the same rig can exist. Without a schematic digest, even the seasoned FM ham can get lost in a rig. Generally speaking, these manuals are of excellent quality and are quite reasonably priced. One such book is the FM Schemaric Digest by Two-Way Radio Engineers, a 73 advertiser This contains Motorola scliemat-ics, crystal information, pictures, block diagrams, FM theory lessons, alignment information, and more,...

Rm

It seemed to me thai one of the problems facing the Techs is their isolation from CW and that if thej had more of an opportunity to use it they might be inclined to go for their Genera , The code, as 1 said before, is not difficult to learn once you make up your mind to have at jt- In spite of the nice special CW band at the low end of 6 meters, the Techs have so far almost completely avoided any contamination with CW-So, even if a Tcch wants to gel on and try to improve his CW ability, he is...

In Oklahoma Inoculation Program

Itoh Cunningham, the Oklahoma City Ci ilL Defense Radio Officer, requested amateur assistance for the Rubella inoculation drive Sunday. February L 20 lo 25 clinics were set up m Oklahoma County. Mobiles, 6 meter AM and 2 meter FM stations were set up at clinics to coordinate activities. The VHP club and Ihe I'M repeater group covered the entire county. WA5HWN and K5SKA were net control on 50.50 MHz- W5GGB, the I xplorei Scout Post 5 station, served as net control for I'M activity on 146.94 From...

Dayton Hamvention

Dayton Hara Arena and Exhibition Center Technical Sessions Women's Activities Exhibits Flea Market Awards Banquet and going out on the air along with the audio. This appears to be a function of the car being used and how hard the alternator is working. Standard is coming out with a filter to go in the supply line but have not seen it yet. Standard's SR-CL25 power amplifier has been very useful when operating in fringe areas. Whenever someone reports that my signal is a little ''scratchy ' 1...