• UNITED TRANSFORMER CORP

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F The 432'er Station Assembly and On The Air Tests Bill Hoisington KIell 8 3 Bellevue A ve. Melrose, Mass. There comes a time when you have to put everything together. That new beam must be mounted and the cable led into the shack, a send-receive switch installed and tested (see below), along with the transmitter turn-on switch, or switches, the receiver mute switch, etc. First attention must be paid to the sendreceiver switch. If a rotary wafer switch will do a good job this will maintain the low-cost philosophy of the 432'er as designed. An ordinary porcelain (Steatite. Isolantite, or what have you, but not bakelite) switch was taken apart and remounted very close up against a copper-clad bakelite "ground-wall." See Figs. 1 and 2. The spacing between the porcelian wafer and the copper is actully less than a 16th of an inch. This wafer is 1 and r, inches in diameter. The switch can be any good make of the material mentioned, but should be of flat construction. That is, viewed from the side as in Fig. I, the switch contacts should lie as flat as possible to the copper wall. 1 was able to sue the original bolts with one additional washer added to the fiber washer between the wafer and the copper wall. Fig. 2 shows a face-on view. Prepare each cable end carefully using a minimum of exposed center conductor. T his includes the center cond uctor inside the insulator material as well. As soon as it is outside the braid it is "exposed." 1 find that separating the outer cond uctor, or braid, into two pigtails and soldering those flat to the copper wall works FB. Note that if you use solid copper you may have to use too much heat and melt some of the cable insulation. Of course, if you have Teflon insulated cable, FB for you. I used ordinary RG-58/ U, and care. This should cover reworking the wafer switch. Now for the results. An exact duplication of on-the-air conditions was set up in the shack. A two-element beam was fed with matched RG-58/U cable from the transmitter first without going thru the switch. A second beam across the room lit up a test bulb with rf, checked with power detector and meter. Then the switch was inserted in the line between the transmitter and the test antenna. Actually the bulb lit brighter after ...".t< _ , ,••,.,••J _CO••( . r" ""~' , ...., ..~~ . ,.,. ' ."
............ ._...- -- -.. -- -- - .. - o .. .--9 '.. - • .. - .. .- -0- - M _ , .. ... .- @ ,,~ - 10-80 METER DUAL CONVERSION AMATEUR RECEIVER MODEL 99·2524WX HA·350 189 50 Uses Mechanical Filter For Exceptional Se'ectivity- Offers 2KC Bandwidth! -- '--- lafayette's newest! A dual conversion superheterodyne communicat ions rec eiver covering th e 10 through 80 meter amateur bands and offering a high order of electrical and mechanical stability for superior AM, CW and SSB operation. Check some at the exceptional features! 1 • Sensitivity 1 IlV or Better • 7 Band-Switching Positions-3.5, 7,14,21,28,28.5 and 29.1 MC, plus WWV on 15 MC • Tuning Dial Covers 600 KC for Each Band • 12 Tub es • Crystal-controlled 1st Oscillator • Transmiller-type VFO for 2nd Oscillator • Preselector Tuning • Crystal-controlled BFO (Dual frequencies) LAFAYETTE 10·80 METER BAND TUNEABLE VERTICAL ANTENNA • All Heterodyning crystals supplied • Selectable upper and lower Sidebands • Geared Tuning Mechanism • 100 KC Calibrator Circuit (crystal optional extra) • Separate Diode AM Detector and CW/SSB product Detector • Coax Antenna Input • 8 and 500 ohm outputs • Imported NEW! LAFAYETTE ..,.--L__ "BEAT-BANDER" EXTERNAL BFO 4D-Ol04WX 14 95 • Single adjustment for tuning antenna • Omnl·directional-overall hlight 18 ft. • Rugged, wind-resistant-Irridite· treated • For Ground. Roof or TDwer Installation • 52 ohms impedance-10DD watts power rating 99·2502 11 95 • Stable, Transistorized Circuit • Provides "beat" frequencies trem 3.5-32MC • CDnnects to Receiver's Antenna Input • Ideal for receivers without BFO, Dr those using a combined Q-Multiplier/BFO • Complete with coax cable and 9 volt battery • Imported fREE! lofoyette 576-1'9. 7965 Catalog No. 650. Write: lafa yeHe Radio Electronics Corp., Dep'.73K.·4, P.O. 8 0 K 10, Syosset, L. I., N. Y. 11791 NOVEMBER 1964 19
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Page 9 and 10: • FIG. 2 - :\Ie thod of feed poin
Page 11 and 12: SOLID STATE "SCOOP" FROM GONSETJ FI
Page 13 and 14: "BEAMED-POWER" ANTENNAS and ANTENNA
Page 15 and 16: jammers usua lly off their mark bec
Page 17 and 18: NUVERTER @ 2 and 6 Meter Converter
Page 19: 1--- COPPER - CL AD BAKELITE 3'1/ 2
Page 23 and 24: Frank says even filament voltage ca
Page 25 and 26: , • c one ose / u.t· -band HAS E
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Page 29 and 30: watts of audio from the modulation
Page 31 and 32: • U£ - GPR-92C GPR·92 II COMPLE
Page 33 and 34: Eugene Fleming W40 HMK Box 884 Gra
Page 35 and 36: MODEL TA-36 TR.I1J for 10·15·20 m
Page 37 and 38: • MOD.ELTA-33 ... - - -- ~~~f~o r
Page 39 and 40: 5 BANDS , 400 WATTS HOME ,STATION M
Page 41 and 42: Details of tra nsceiver installatio
Page 43 and 44: patch consists of the coil, one or
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Page 47 and 48: Det roit, Michigan: " Does an excel
Page 49 and 50: 1000WATTS..WITH WHEELS The mobile 5
Page 51 and 52: AMATEUR NET Th e new Model 2-LF Low
Page 53 and 54: Assembled & tested, complete with s
Page 55 and 56: c EMITTER CO NNECTIO N TOP VIEW ALL
Page 57 and 58: SERVICE r • TESTED EQUIPMENT from
Page 59 and 60: BRYAN EDWARDS, JR. "T he from Kid T
Page 61 and 62: Coil T ab:e Transmitter L I- 6 turn
Page 63 and 64: Solid conductor hook up wire Strond
Page 65 and 66: truly portable, the other is not po
Page 67 and 68: should be kept as there are individ
Page 69 and 70: voltage and current values into the
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some mean s of attaching guy wires
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YOU KNOW ABOUT THE • MOBILE POWER
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scale. Now adjust the vfo trimmer c
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I'm sure it cou ld be done, outboar
Page 79 and 80:
ing 200 Meters and down, in 1910 th
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5B-33 and MP-l0 Myron Pogue W6VAX S
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for checking your frequency before
Page 86 and 87:
Kenneth L. Mills K8AJD 3013 Cameran
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THE NEW IN STOCK AT • MODEL SW350
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SPECIAL SPECIAL SPECIAL Radio Han d
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Kentucky DXpedition Hammarlund pull
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, Letters Dear Wayne, Last May I wa
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INDEX TO ADVERTISERS To aid you in
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Propagation Chart GMT - EASTERN UNI
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• UNITED TRANSFORMER CORP

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