Communications Receiver Bargains
BC453B 190-550 kc G-tube superhet w 85 kc tF's. ideal as Jong-wave revr, as tu abfe IF amp . as 2nd convert. W all data, CHECKED ELECTRICALLY 12 95 Grtd. OK M lbs. fob Los Angeles Same, in handsome cabinet w pwr sply, spkr. lt 37 5Q etc., ready to uset is our QX-535, 19 lbs, . . f RBS Navy's pride 2-20 mc 14-tube superhet has voice filter for low noise, ear-saving AG C, high sens, amp select. IF is 1255 kc. Checked, aligned, w pwr sply. cords, tech data, ready to use, fob Charleston, S. C. 559...
Surplus Specials
Monitor sub-unit for freq-shift converter CV-89A U RA-8A. with 2BPI CRT, 1Z2, 12AX7, 5 controls, tube shield, etc. 4JV x 5 x 12. Shpg. Wt. 7 ibs. Schematic incl. . 56.95 Monitor sub-unit for freq-shift converter CV-89A U RA-8A. with 2BPI CRT, 1Z2, 12AX7, 5 controls, tube shield, etc. 4JV x 5 x 12. Shpg. Wt. 7 ibs. Schematic incl. . 56.95 Pi-network Loading Capacitor, 5 sections, each 20-400 mmf, 2000m mf total. 3s shaft. 4 ibs. 2.00 Power Transformer 350-0-350 v. 135 ma de, 5v 3A, 6.3v 3 6A. 3...
Lafayette He B Deluxe Meter Transceiver
High Efficiency Up To 100 Modulation New Modulation and Power Transformers plus 7BG8 Power Pentode New Heavy-Duty Communications Vibrator Front Pane Antenna Loading Controls New Standby Switch VFO Power Jack Sensitive Superheterodyne Receiver Built-in 117 VAC and 12 VDC Power Supplies Rugged Push to laik Ceramic Microphone LAFAYETTE HE-50A 10 METER TRANSCEIVER Simitar to above except for 10-meter operation 89.95 THE LAFAYETTE HE-30 Professional Quality Communications Receiver Tunes 550 KCS to...
Transmitter Series 1
TMC Models SBT-1K series of transmitters provide conservatively rated 1 kw PEP output in SSB modes, with Signal to Distortion ratio of 40db, and 1 kw average power in conventional communication modes within the frequency range of 2 to 32 Mcs, Stabilities of 1 port in 10 to synthesized accuracy of I part in 108, with 100 cps incremental tuning, are featured in this series of transmitters. The TMC SBT-1K series of transmitters are attractively housed in semi-pressurized cabinets with many...
Iso Watts Continuous
BF ELECTRONICS proudly presents the all new transistorized Mobil Power Supply Kit at the LOWEST PRICE any where. A new concept In kit construction gives you top Qu ALU i and PERFORMANCE for a minimum investment. FEATURES INCLUDE lt 150 watts continuous power output at 13 F. 2 Highest quality purl- manufaelittcd in USA, 3. Fully transistorised with silicon rectifiers. 4. Toroidal trail former jives 35 efficiency. 5. Heavy filtering gives less than ripple. ti. Bleeder resistor for capacitor...
Irving Electronics Co
The Box Kite ' This took 175 mph winds down at 20 ft. The Box Kite ' This took 175 mph winds down at 20 ft. was operated for two years and compared against a manufactured medium spaced trap tribander with far belter average DX reports from the quad. On local stations signals little difference of strength was noticed. The quad would receive DX signals earlier and stay in longer than the comparison antenna. This observation may be due to the quad's automatic heighth adjustment of up to...
Ground Radial System Kits
Take fhe v orir ouf of fafaricaf ng your antenna ground system Here are ground radial system for getting improved perform -a nee from Ions-wire, vertical and oilier 1 H AM ami SWL antenna which are opt-rat l against grouftd. These radial sys-temg will also in prove lIig efficiency of ungrounded antennas such as doublets, ssepps and directive arrays reducing tlie tosses resulting from grouriti Imperfections. Excellent as permanent or temporary Field hiitsillatluns Complete, ready .0 rull nut...
E F Johnson Company
VALIANT II'1 Outstanding flexibiiity and performance bandswitchjng 160 through 10 meters delivers 275 watts input CW or SSB with auxiliary SSB exciter or Viking SSB adapter and 200 watts AM Low level audio clipping differentially temperature compensated VFO provides stability necessary for SSB operation High efficiency pi-network tank circuit final tank coil silver-plated. Other features TVl suppression time sequence grid block keying high Rain push-to-talk audio built-in low pass audio filter...
Waters
The WATERS Q-MULTIPUER NOTCH FILTER will permit you to tune out annoying heterodynes. It gives a null of ot least 40 db tunable across the entire IF passband The WATERS Q-MUITIPLIER NOTCH FILTER combines on isolating amplifier and a tunable LC Bridged-T network with a Q Multiplier Designed specifically to fit the Collins 75S-1 or Collins KWM-2, the unit comes assembled ready for installation. Escutcheon plates and knobs ore matched to equipment so there is no discernable change in appearance of...
Info Fkj
Donald Wiggins W9CWG 807 Lincoln way VaIpqraiso, Indiana The pre-amp described here evolved as a result of having several transmitters on different frequencies, each with 11s own microphone or needing the microphone already tied to another transmitter. It was reasoned that with one p re-amp stage feeding several cathode-follower stages one microphone could be used on the operating table with each cathode-follower connected to a different transmitter. The low impedance of the cathode-follower...
Stub
For Switching 2 Coaxial Lines Simultaneously Freq. 0 to 500 me Power Rating to 1 kw VSWRJe than 1 .IS to 1 from 0 to SOOmc Standard coil voltage and other r.f. 0K2-4Owith uHF Conne Tors, e S19 Connectors available. Manufactured jnd Guaranteed by DOW-KEY CO., thief River Falls, Minn. two of the elements of the four element quad as si town in Fig. 5, it becomes possible to have a two element 40 meter parasitic beam with one-half wave elements folded in the shape of a square. These stubs had...
Whjv
We never cease to be amazed at the homebrew construction articles in the ham radio magazines. You know, the ones where the chassis doesn't have a single extra hole, and is all decked out with store bough ten parts, Down about the third paragraph, the author casually mentions that part number F-l Multi-Krammis Snickafoo Filter can be special 350 mmfd variable Raunchy Radio Co Part. Inductor, 9 54T. 20, O.D., 4 T.P.L 750 tih RFC 2.5 mh RFC 26,000 Ohm, 2W resistor ordered from Shifting Sands...
Complete
one goes up like a rocket. . . and it is only a two man job. All the space needed is one sq, ft. Crank up to 60 ft. and down to 21 ft. BA-60 46G 259.50 GP-60-46P 264.00 GP-60-46G 324.00 If triband or 20 11 operation is desired, this model may easily be converted to a Medalist 40 Freight prepaid anywhere 48 U. S, A. free information write Department rtB all the info we can on what is most interesting to see, and where the best reasonable restaurants can he found . . . plus anythnig else wc can...
The Largest Inventory
of USED EQUIPMENT in the NORTHEAST. SEE SAMPLES BELOW. Collins KWS-1 W Station Control Gonset G-28 10 Meter Communicator Gonset GSB-101 Gonset 5Q0-W R.F. Power Amplifier Haliicrafters 5X 71 Hallicrafters SX-96 Hallicrafters SX-100 Hallicrafters SX-101 Mk 1A Halficrafters SX-101 Mk III Hammarlund HQ-110 Hammariund HQ-I10C with Clock iohnson Courier Johnson Pacemaker National NC-98 189.95 249.00 1100.00 179.00 259.00 169.00 135,95 154.95 199.00 239-00 264.00 189.95
Kw
linearity control interacts with the center frequency control and adjusts the linearity of the sweep of the local oscillator. The if amplifier and power supply are of the standard variety so time and space will not be consumed in outlining their function. The CRT controls are similar to those used on the Modulation Analyzer. The receiver was modified by adding a 10 mmfd condenser or less to the plate of the stage you desire to use. Connect one end of the condenser to the plate and the other end...
Crystal Controlled
Bert Green W2LPC George Phillips WA2PDI Amperex Electronic Corp. 230 Duffy Avenue Hicksville, New York When designing a kilowatt linear amplifier that will handle a full gallon input as a sideband, C V or AM linear, Llie selection of the tube depends oil the following A. The linearity of the tube without feedback, B. The overall physical size of the tube, socket, and blower. C. The overall cost of the tube, socket and blower. In category A, linearity, the Amperex HI79 was rated for lowest...
Ar
50-470 mc mobile transmitter has 2C39 tripler, 2C39 final Final will operate with coot 80 w input 40 w output. No mechanical changes required in cavities to tune to 432 mc. Final con be AM plate modufated. FM receiver converts to 432 mc with simple mechanical changes, All units complete with 2C39 tubes and diagrams and alignment instructions. No control heads or cables. T44A - 6 V missing few tubes and crystals 40.00 T44A-6 6Gft2V complete less receiver crystals 54,50 Receiver strip complete...
Parts List
In addition to the small parts Shown on the three schematics the following items are required. Coil data is in eluded LI 16 turns 30 enam, on National XR 91 Coil Form Ji dia.-slug tuned L2 5J4 turns 16 TFI ,f tffc B amp W .3007 L3 7 turns 16 TFI dia. B amp W 3007 L4 turns 8 TPI K B amp W 3010 L5 2 turns hookup wire tight wound on cold end of L4 CI 15 mmfd. miniature variable Hammcrkmd HF-15 C2 15 mmfd miniature variable Double spaced ITF-13X C3 100 mmfd. miniature variai le HF-100 On Lise...
Sp Kw Pep Ssb Linear Amplifier
linear amplifier shows what can be done in designing a low distortion, high efficiency amplifier by following the above recommendations and by using an extremely linear tube, designed specifically for single sideband use. such as the 8179, . . , W2LPC Ll 38 tllY 8 Turns 406 Air Dux 1 4 1 4 HY 18 Turns 510 Air Dux L6, L7. L8 3 Turns 14 Wire Wound on Kl, R2T R3 L9 Plate Tank Coil Illumitronic PI Dux P1 195-2 Modified as per Figure I LIO RF Choke OH MITE Z28 Lll Ravpar All Band Plate Choke Ll2 -B...
Skylane Quads
Y HIGH F B RATIO ViRY 10W SWR K HIGH GAIN I LOW Q - BROADLY TUNED EASY TO MATCH
Parts Kit
We've rounded up everything you need to knock this one together except the chassis , including tubes, sockets, coils, coax connector, capacitors, resistors, rf chokes, etc. The wboie kaboodle catalogs out at SI 8.60, Since J spend most of my operating hours as a CW traffic hound and gum beater, and DX has been mainly an afterthought, I've used a separate antenna on the receiver for all of my 15 licensed years. Recently with the DX contests coming up and with increasingly good performance on the...
Info Rbo
LO PRICED SILICON TV BE REPLACEMENTS WITH BUILT IN SU ft CE AND SEH I ES BALANCING PROTECTION TG66 5000 1Q100 0.3 5 6 T5R4 1900 2500 0.5 7 LO PRICED SILICON TV BE REPLACEMENTS WITH BUILT IN SU ft CE AND SEH I ES BALANCING PROTECTION TG66 5000 1Q100 0.3 5 6 T5R4 1900 2500 0.5 7 TAB FOR TRANSISTORS amp DIODES ' Full Length Leads Factory Tested di- Guaranteed U.S A, Jtf f, VST Hi Tower 15 Amp, T03 amp T03G Round lvkp. 2N441, 2N1 77 Si,25, 4 for 2N4 2. 2N27S 3 , 2 for 55 2X443. 2M7-1 S4 , 2 for S7...
Halo
Saturn 6 plus mast amp bumper mount . , S. A TRI-EX TOWER FOR THE REALLY BIG ANTENNA LUADS For example look at the picture below from top to bottom the antenna consists of 4 elements wide spaced, 15 meters at 90 feet G elements optimum spaced, 20 meters at 80 feet 3 elements wide spaced, 40 meters at 71 feet. The sower shown here is the Tri-Ex HZRN 71 foot tower which raises, lowers and rotates by remote control. The HZRN is available in 37,54, and 71 foot heights. The HZN series, which does...
I Lh
.-L A j L t 1 ' Li i k .V . - rt 4 .tj'JS PPX'tif jC i M H. U T WJ EKr.i i-1 . _Tft amp L5 '. I j-Nfi gt ' UO i Fig 2 Schematic of the ALTEC 460A Transistor Compressor Amplifier, While designed for telephone repeater service, the circuit is ideally suited for amateur transmitter applications, Output level varies less than 20 db for an input range in excess of 50 db. Output noise level is TO dbm. As designed, the unit draws 25 ma from a 52 volt source. However, the majority of this power is...
Surplus 1
This is a complete list of every surplus conversion article that has ever been published, with a brief description of the conversion. Invaluable bibliography. This book gives you a blow by blow description of how to get on the air on TV for under 50. This book is the reason that hundreds of hams are now going on TV. This is not the usual theory book, just a how-to-do-it manual. Written by an expert. One of the best methods for learning the code yet devised. Lays in a good foundation for later...