Total

FISHER CORP. 75 SOUTH STREET, HOPKINTON, MA 01748 Crystals are available for the following two meter FM transceivers at this special price offer Drake, Regency, Simpson, SBE, Sonar, Standard, and Tempo. Please specify the make and model transceiver when you place your order so we can be sure to send you the correct compensated Crystals. A series of crystals will soon be available for the 147 MHz segment of the band, so watch our ads for this announcement. The only way we can make crystals...

Waeo

Log-Per iodic References Ham Publications 1. Nov. '59 QST. Log Periodic Antennas Car T. Milner Wll'VY. 2. .Itine '63 QST, Three-Band Log Periodic Antenna Robert F. Heslin K7RTY, (140-450 MHz) Partial reprint in the A.R.R.L. Antenna Book. Good construction details for VHF EHL Log. 3. Nov. '64 73,A Wide-Band High Gain Antenna 4. May '6 5 73, The Design of Log Periodic Antennas A. E. Blick VE3AHV. Complete formulas for designing L-Ps. 5. Oct. '67 73, VHF Log Periodics and the Log-Scan 420 Hal...

Order Direct Or Write For Full Information

Model 75 40HD 40 00 Model 40 20HD 33.00 69 Ft 80 40 15 Meter (CW) 300 S. Shawnee Leavenworth, Kansas 66048 66 Ft 75 Thru 40 Meters 35 Ft 40 Thru 20 Meters WITH NEW FEATURES THAT MAKE IT EASIER TO TRANSMIT AND RECEIVE BETTER PICTURES, YET AT NO CHANGE IN PRICE. The new Robot Model 80A Camera and Model 70A Monitor remain essentially the same complete SSTV equipment as our earlier models> but have new features added to give more accurate operator adjustment and flexibility of operation, yet as...

Slep Electronics Company

2412 HIGHWAY 301 ELLENTON, FLORIDA 33532 WRITE OR PHONE 813 722 1843 The NEW Excello Six Meter Transmitter is the FINEST TRANSMITTER in the VHF field today All circuits are stressed ro the fullest output to give Full Drive to the next stage and final output. Modulation is pure and lull using the Finest American Parts and American Labor. Shielding 6U8 OSC 2E26 Final I2AX7 Speech Amp. BRI)1 Mndiilaior

Hams Unite

After reading your article on FCC Responsibility in July 73, I agree completely with it, but I feel a stronger appeal is necessary. If every amateur in the U.S, wrote just one letter to the FCC suggesting that a move be made to encourage Ham Radio rather than discourage it, that would be 250,000 letters swamping their offices The only people who can save ham radio are the hams themselves. Complaining about rules will never change them - only a reason will. So, let's give them a reason. United...

Amp Voltage Regulator

A 700W hybrid silicon voltage regulator capable of line regulation of 0.10 and load regulation of 0.15 has been introduced by Motorola. The MPC1000 is a 10-ampere positive or negative series voltage regulator capable of operating with input voltages as high was 60V. Output voltage can be adjusted from 2 to 35V to permit this single device to serve a wide range of output voltage requirements in the lab. Output currents of 10-amperes are easily obtained from the MPC1000 without external pass...

Yaesu Musen Usa

Paramount, California 90723 Phone 213-633-4007 Treasure Island in 1943 hmmm, thirty years ago. They teach the basics of electronics as well as the working and servicing of all of the radio and signal equipment used by the army. This runs the gamut from sophisticated synthesized gear all the way back to things like that Russian Mark II tank transceiver that was selling surplus for S30 in 1946 -Grmbels ran a special on them, believe it or not. They were so useless that hams were never much...

Watt Solidstate Second Generation Meter Channel Fm Transceiver

SN7402 SN7403 5N7404 SN7405 cO - SK7406 . SN7407 5 SN7408 O fl 0SN7409 TJ SN74IO j I SN74H ffl5 1 SN74I3 gt g i I SN741S a 2 SN7416 g SN7417 SN7420 amp SH743I SN7422 HIGH POWER TRANSISTOR 3 f WITH HEAT SINK Removed from new equipment Include popular 2N174 'doorknob transistor termnni um, PNP, 150 watt . VCBO 80 V, 15 amps, 40 hfe. For ignition, high powttr trans-mitters. etc, Mounted on heat, sink 5 x 21 L gt 1W'. HAM' UHF 400 MC HIGH POWER J TRANSISTORS Dt ignftl by nur Scientific Devii t lt...

Wichita Hamfest

On Sept. 9, 1973 the Wichita Amateur Radio Club will have its annual Hamfest at the Sedgwick County 4-H Building, ft is located on the N. W. corner of West St and Central Ave. in West Wichita. For those people who don't know the Wichita area there will be talk-ins on 3.920 MHz, 7,275 MHz, 146.34 MHz, 146.94 MHz, MARS, ARRL and Kansas Net Meetings. Games, Free soft drinks, and Prizes. Starts 10 00 AM ends 4 00 PM C. D, T. Admission SI.75. Write Todd Gearheart, 1320 Summitlawn Ct,, Wichita,...

See

Join the New Age of Amateur Radio Electronics Equip your ham installation with one of these fine New Fully Solid-State Transceivers. . .each mode operates directly from any 1 2 volt DC supply SWAN S3-200 200 Wails P,E,P, , . 779,00 SWAN SS-100 100 Watts P.E.PJ . , 699.00 SWAN SS-15 15 Watts P.E.PJ . , , 579.00 If you must operate from a 11 5 volt AC source, order one of these power supply units SWAN PS-10 For SS-10Q SS-15K . S 89,00 Available Accessories Include SWAN SS-208 External VFO . ....

Equipment From

The following list of gear, unless otherwise noted, consists of brand new equipment purchased for testing purposes only. Some have been tested, some remain unopened In original cartons. We are offering this gear at a considerable discount on a first-come-first-served basis. Heath IB 101 and Miida Digipet 60 counter with Digipet 160 converter S400 HR2JVIS 8 ch scanning 2m xcvr 15W 255 TME-H LMU 16 ch scanning revr 6 2 m 255 Midland 1520 hand-held 2 meter 190 SBE 450 450 xcvr 340 JOBS FOR HAMS 73...

Voc

I've found many uses for this type of circuit. Imagine being able to switch your class of bias on experimental transistor amplifiers with the turn of a pot. If you design it right, you can turn a voltage amplifier into a power amplifier and vice versa with volume control' ease. As IVe said, all of the circuits in Figs, 1-3 do basically the same thing. It's just that they go about it in a different way. Each has its own good and bad points. For example, the circuit of Fig, I has the disadvantage...

Wblbp

Biff Turner WAOABt Five Chestnut Court Sr. Peters MO 63376 W85CHN of Duncanville, Texas ays the DX season started slowly from that area with the only real DX being KP4DKE and KP4AHQ. Things were not ail bad for Jim, he did manage to work Mississippi for state M7 leaving only KH6, KL7 and Idaho for WAS, I heard Jim on the air since receiving his letter and found he was sporting a linear of the type in the Ju y 1969 issue of 73. It sounded great here and brought the signal up about 12 db, . ....

Atlanta Area 2 Meter Autopatch

,4 circuit that allows auto-patch access and dial-up with one finger ease and convenience Almost every major city in the United States has at least one 2 meter repeater that has auto-patch access capability. While the majority of telephone calls that go through these repeaters are generally of the social nature, there are cases where lives have been saved by the quick reporting of accidents by Good Samaritan4 hams with 2 The ''Patch Padr' shown assembled and attached to the transceiver. meter...

National Security Agency

Miniature printer, in original boxes Teletype -109000 Model 51 . S8.95 each, or 3 for S25. Include postage for 20 pounds. Jim Cooper, 657 Forest Avenue, Paramus, NJ 07652. WANTED URGENTLY 2 or more FFRD 7 8 7 6 MHz tuning heads for AN F RR-49 receiver. Must be in working condition , state price and condition first letter, no junk wanted. Will also consider other range tuning heads and parts for heads and F RR-49 receivers- John Fail KL7GRF, Box 1196, Petersburg, Alaska 99833. HOOSIER...

Peoria Hamfest

The Peoria Area Amateur Radio Club, Inc. will hold it's 16th annual Hamfest Sunday, September 16, 1973, at Exposition Gardens same place as last year , located on the northwest edge of Peoria, Illinois. Lunch wifi be available, There wilt be plenty of activities for the entire family, beginning with the campsite opening the preceeding evening and the banquet Sat., Sept 15, at V Junction, 5.50 per person. Door prizes for men and women, cocktail hour 5 30 to 6 30, dinner 6 30. Two motels within...

Vnput

50 MHz, making it a suitable detector i-f for a number of converters, receivers, etc. Suitable applications for this IC include automatic control systems, receivers and servo amplifiers. There is no reason why a simple receiver cannot be built to monitor FM repeaters on the 10 meter band, or for the SWL a Lo-band monitor for commercial frequencies. Again, the applications are limited only by your imagination. Teletype and frequency shift keying is a natural application for the PLL, Figure 5...

B

Endfeed Antenna

Between which the two-wire center feeder With the two-wire feed line secured to and made tight between the two supports, mark a starting point about 30 cm from one of the end supports . This can be indicated by a piece of plastic tape or masking tape secured to each of the two parallel wires or a quick-drying paint smear can be used . This will be the starting point or the location of the No J rear longest element. Note An egg-type insulator will be used as the center insulator for the rear...

Tristao

MM-40 - Mini-mast. 35' crank-up tubular self- supporting tower 174.95 Optional MEMO free-standing base 16,25 Optional MF-50 raising fixture . . . . , 57,95 Optional MRB-8G rotor base 98.95 MA-4 90 - Magna-mastf 49' crank-up tubular self- supporting tower 357.45 Optional MAF-40 raising fixture 104.95 Optional MARB-40 rotor base 225 45 MA-G60 - Magna-mast, 66' crank-up tubular self- supporting tower 974.45 Optional MAF-60 raising fixture 11 9.95 Optional MARB-66 rotor base 419.45 CZ-454-FX - 54...

Xceiver Changeover Relay

Diagram of the 'optimized' TTpad schematic, output frequency. Depending on the severity of the mis-match, under worse case conditions, the tone generator's output frequency can be pulled out of the pass band of the telephone company's switching equipment. Therefore, it is most important that impedance relationships be kept within tolerance in any design using a touch-tone pad. Also, some provision must be made to control the amount of time required for the output to stabilize at the...

Swan Mark B

10 to 80 Meter Transmitter , . . . 589.95 SWAN FM1210-A - 144 channel combinations are provided through independent switching of 12 transmit and 2 receive frequencies with eight crystals installed. Dynamic microphone included. Covers 144 to SWAN VHF-150 - 2 Meter Linear Amplifier. 180 Watt P.E.P. Built-in 11 7 or 230 volt AC power supply. 299.95 SWAN 14C - DC Converter, adapts to SWAN VHF-1 50 for mobile operation. Also converts 11 7XC and 230XC to operate with a 12 volt DC source. , , 69.95...

1

Price - S per 25 words for non-commercjal ads SIC pe 25 words for business ventures. No display or agency discount Include your check with order. Deadline for ads is the 1st Of the month two months prioi to nubll amp ibn For example January 1st ie the deadline for the March issue which wiirbe rnailed on the 10rh of February. Type cooy. Phrase and punctuate e 3Ctfy as you wtsh it to appear No all-capital ads. We will be the judge of suitability of ads. Our responsibility for errors extends only...

Info

Transistor 2n3716 Serie

Benton Harbor, Michigan 45022 L_j Please erid FREE Heathkit Catalog. Endued it _ -Mj.l oTdi-r cricei, FOB factory AV-282 do any harm. Ail cards containing iogic, Le, control logic and ID, should be completeiy shielded in a metal enclosure. Leads interconnecting the logic to other parts of the repeater should piss through the enclosure walls only through feed-through capacitors. Leads should also contain small chokes of about 10 iH mounted as close as possible to, or perhaps right on, the logic...

Los

Fig, 2, The expected arrested Doppler effect, observed frequency is the same as that transmitted from the satellite .e,, no frequency shift, either up or down. As the satellite recedes from the observer, its velocity is subtracted from the velocity of propagation, resulting in a total apparent downward frequency shift of approximately 8 kHz, for a shift during one orbital pass of 8 kHz, or 16 kHz total. This normal effect had been noted on all previous OSCAR satellites. However, on October 24,...