S

PM tuner using 2N2089 (2N2671) and 2N2495 S- 06 10,7 mc it strip and ratio detector. ST 10 VIII' power amplifiers at 200 mc using the 2N2786. S-113 Low noise 200 mc if amplifiers using the 2N2495 S-1 4 Potter output of parallel 2N2786 at 235 tnc. ST 15 The A m per ex not s are urn que in giving very complete in ormatton on coils. They even give layout in a feu cases for instancer S-110 tells you how to uind your ou n 0-T mc if coils and S-105 r es information 0 a cavity filter for the front...

A F Nb

He balanced modulator is of a very conventional design, using two shuntfed diodes. The coil is hi filar wound to assure a good balance. The carrier-mil ling is done with a 1 kiloohm carbon potentiometer and a small variable capacitance. The transformer L is a modified 10,7 mc miniature transformer. One of the sections is removed and a bifilar coil La is wound close to the cold-end of L2. The Lop of Ll> is coupled to the filter through a 5-30 mmfd capacitor. The filter is shunted by a resistor...

Johnson Pacemaker

NATIONAL NC-300 Receiver with Speaker TEC RAFT MODEL CC50 6 meter converter 14 to 8 mc IF 169.00 19.00 49.00 15.00 24.00 29.00 49.00 19.00 35,00 59,00 179.00 3 9,00 39.00 159.00 35.00 159.00 179.00 BRAND New Hallicrafters HA2 or HA6 Transverter complete with P-26 ac supply regular 449.00 Value Special Only 199.00, Limited Supply

FIGURE

Inc. SubsiiJ.atv of Cansoltdatf i Eleciromts Industries Corp ALLIANCE, OHIO Recommended mounting one foot maxtmum above the rotator. For complete details write ffL Listed amp CSA Approved The ALLIANCE Manufacturing Company. Inc. SubsiiJ.atv of Cansoltdatf i Eleciromts Industries Corp ALLIANCE, OHIO The patented-rigid-offset design distributes the load over a greater area and gives the rotator a superior strength to weight ratio. Ideal for use with amateur...

Transistors Unlimited Company

Pos Office Box 442, Great Neckr L lt I., N. Y, Warehouse amp Office 4V 2 Jericho Turnpike, M neolat N. Y. 5 6-PI 7-7221 effort. In the past the Waith am Amateur Radio Club Mass. has done a sterling job in this contest by driving an unbelievable amount of equipment and antennas to the top of Pack Monadnoek, a mountain just a few miles inside the New Hampshire border. This year the club decided to set up on Grand Monadnoek and take advantage of the 73 Villa there . . . and its antennas. The work...

1296 Mc Ground Plane

G Johnson 1-7 mmfd miniture variable Placement of parts is not critical with the single exception that the oscillator and multiplier circuits are shielded from each other. Care should be taken to anchor all components securely and ground the crystal case. The schematic diagram is shown in Fig, 5. After the oscillator circuit is wired completely check all connections before applying supply voltage. Make sure the correct battery polarity has been observed. Apply voltage and with the unit lightly...

Converter

5199 dual eye Indicator S279 CR tube indicator S14.50 cabinet Audio input. Scope or dual eye indicator. Plug-in inductors for wide or narrow shift. Axis restorer amp Limiter can be switched in or out of circuit, to suit conditions of fading or interference. Copies on Mark only or Space only automatically Mark hold circuit. Loop amp Bias supply for optional polar relay for keying transmitter. Keying tube keys magnet. Terminals on chassis for externa keying relay amp scope indicator....

Coil Data

Li 4 4 turns hihlar wound on cold end of L La one section of a standard 10, 7 mc if transformer. La same as Li- Lo 16 turns Airdux 816, collector taped S turns from the hot end, Lx 3 turns on the cold end of Le, spaced 2 turns. broad-band transformer wound on a ferrire toroul Lb 12 turns, Ls 3 turns. Lio 80 meters 20 turns, taped 5 trom hot end. 20 meters 14 turns, taped 5 from hot end, .11 80 meters 4 turns 20 meters 3,5 turnsi Li2 as Lio on both bands, Li as Lio but no taping. Li 80 meters 4...

Info

Subscribe to 6up Devoted exclusively PL259, SO-239, choice 35c ea l2 3,75 VI 39c, 3 S.I0 PL-258 6oC, o 3k00 double male DON'T BIND 89c ea, 5 4.25 M -358 lt 4T 1.95 CH 25 95c ea, 5 S4,50 J-102 one hole chas. female . . 29c 4 SI.I0 U G - f 75 U or UG-1 76 U, reducers lie. 10 SI UG-2I U, N male . . 35c, 3 L UG-aa U _______69c UG-290 U 69c, 3 51.95 lt clcan, 29c 4 LIO UG-274B U, BNC Vf LOO 5 for 4.75 BLITZ BUGS, type i LAC-l 3.75 each Co-ax feed thru capacitors, 5 mfti 50 v DC, 40 amps l.95 each....

Iransformers

Driver, Interstage, amp Output. lt T., Sub-mim , ____ 3 .00 Filament, 24 voit sect Pri 115 VAC 60 cy S .25 C R, 'atch transformer, 4 watts L50 Att Kc. Ost . IF,. center tapped at aia e 4 SI.00 Volume Controls ivtth switch suh-min,, 2000, 3 500. 5E l K . . L L , 3 S1.00 Spo km flUb-rntn. ft ohms iitiutt, loo ohms output L00 ptakesrs Tweet s inrh . SI.50 Variable capacitors. superhet, plastic R C 75c Circuit breakers, push-button 25c Tiny switches SPSST, mintsiturc , . . 25c i J n atlts, pin...

Giannini Scientific Company

The attenuator is the device that makes the unit extremely flexible and useful Therefore, a bit of careful attention to its construction will really pay off in the long run. Fundamentally, it is a simple coaxial attenuator using loop pick-up. It is designed for a characteristic line impedance of 50 ohms and the appropriate values of telescopic tubing were chosen to give a snug fit consistent with the proper diameter required for the center conductor An essential part of the...

Chc

More often than not, you can avoid the necessity of computing a divider by direct coupling the emitter follower to the collector of the previous stage. This is shown in Figure 5. Direct coupling also eliminates the drop in input impedance caused by the low impedance voltage divider. This is the only way to insure that your input impedance will be up near the maximum attainable. The only mathematics necessary in this case is the calculation of Rk since the collector voltage of the previous stage...

For Fres Literature

Waft Pollind K6TOV 5661 Elinora Lane Cypress, Cafif, Waft Pollind K6TOV 5661 Elinora Lane Cypress, Cafif, If you like to travel light, here is a compact all transistor, 2 meter receiver that can be used fixed, portable, or mobile. The receiver uses 9 transistors rf, mixer, oscillator, 3 stages, a driver and class B output amplifier, Frequency coverage is 143 mc to 150 mc If frequency is 10 mc and the overall 3 db bandwidth of the if amplifier is 50 kc, The receiver operates on 12 volts and...

Vacationer Package

'. . . .1 55.00 savings on the Vacationer 605.00 value for only 549.00 The Vacationer package includes SB-1M1C Controlled magnetic microphone Band-Spanner Top-sider antenna including 80-40-20-15 meter coils Webster, Etectro-shield system including coil shield, distributor shield, harness shield, spark plug shield and generator or alternator noise supression kit Full instructions 21 feet, RG-58 U coax complete lt vith piug Booklet Mobile antennas, Simple steps to peak performance'' Booklet Auto...

Ms

'World's Largest EXCLUSIVE Manufacturer of Toi t ers des ign e rs gt e n gi rw erst a n d it i sta 11 er of complete communication totver systems. H. M, Meyer, Jr. W6GGV 260 West Beach Ave. lnglewood, Calif, Often during the alignment of receivers and the general cheek out of equipment and anten nas, a signal source is required to make sure you've located yourself in the exact part of the spectrum yon intended. The beacon source described here is designed to fulfill that requirement with a...

Radio Amateur Cw Keyer

Transfer easily from a bug to a keyer and vice versa, You can very easily prove this statement to yourself, just ask one of your friends who has used a self completing keyer for some time to try to send CW with your old favorite bug if he can, he is a rare animal indeed. This is a point many people disagree on, but it is a fact like it or not, lie keyer is rather conventional in that it consists of a free-running multivibrator which generates dots, driving a bistable multi-vibrator which adds...

FIG

Swan-400 5 Band 400 watt SSB Transceiver Also New Henry's new store at 431 L Green St, Pasadena, Calif. Best Terms and Trades and our Famous Personal Service it may be substituted directly. Once the relay is operating, the weight control may be adjusted by ''ear, or more precisely by usin an indicator such as the grid current meter on your transmitter. If the transmitter grid current runs, say 5 ma with the key closed, a string of dots should produce an average reading of about 2.5 ma on the...

Redlinie

Up of four 14 element yagis with both horizontal and vertical elements phased to provide any type of polarization The converter was a 7077 grounded grid followed by a 417A and a 75A3. The transmitter was a 6N2 Thunderbolt. Reports exchanged were 569 and 579 Using a bandwidth of 150 eps the BPZ signal varied from the noise up to 20 db over the noise. Most interesting of all was the five second delay between transmissions waiting for the radio signals to cover the path, DL3YBA near Hannover,...

Order Direct And Save

Please enclose postage as below. Postage 300 mi 600 mi 1000 mi 1400 mi 1800 mi beyond First 2 lbs. 35 .39 AS ,51 .58 ,64 Ea. add'H lb. .06 .08 .10 .13 .16 ,19 KP4BPZ was in there during the ARRl VHF QSO Party on June 13-14 on both two meters and 432 inc. The time and frequency o the skeds were announced bv several him- died IoAR member stations and bv ARRL s OBS, Many groups were sparked into giving moonbounce a try. All of my antennas were pointed at the horizon gt so there...

Parts List

C 3 .8-10 mmfd trimmer Johnson or JFD C 5, C 42 3 12 mmfd trimmer Erie C 6 1000 mmfd Stand off capacitor see text C 7- 56 mmfd- dura mica El Menco C 8, C 12, C 16 82 mmfd dura mica- El Menco C 9, C 32, C 34, C 35, C 36, C 37 .01 mfd disc, ccr. 50 V C 10, C 14, C IS, C 20 005 mfd disc, cer. 50 V C 11, C 15- 5 mmfd dura mica El Menco C 13, C 17 430 mmfd dura mica El Menco C 19 -75 mmfd dura mica El Menco C 22, G 23t C 24, C 25, C 26, C 27, C 28, C 29, C 30, C 31, C 38, C 41 1000 mmfd feed thru...