Amateur Radio Report Card

More documents

Recommendations

Info

Fig. 4-Final Sub-Chassis : Screen resi.stor is shown at upper left. Coupling capacitor, .001 mfd mentioned in text, is shown at lower right. When you connect the .001 mfd capacitor to the 5763 Multiplier plate, leave the other end hanging with a one inch lead. This will later be connected to the variable capacitor on the Final Chassis. F INAL SUB -C IIASS IS- ~ [oun t a 2-terminal plus ground tie lug as shown in the photo. The 22K ohm grid resistor will con nect to one terminal along with a 15 inch length of wire which will later be con nected to the Grid Meter on the front panel. Connect the filament wire to the other terminal. Also mount a I-terminal tie lug, as shown, to which you w iII connect the screen resistor, and later on, the modulation transformer and Plate Meter wire. MODULATOR SUB-CHASSIS - Connect the microphone jack to the 6ANS socket on this chassis with a short length of wire. The jack will be mounted on the back panel at the same time the Modulator Sub-Chassis is mounted. The Gain Con trol on the back panel is connected to the Modulator Sub-Chass is by two 3 inch lengtbs of shielded wire. Do not cut the primary leads of tbe modulation transformer, but connect them fuII length to the 6CZ5 tubes. T his transformer also will be mounted the same time as the Modulator Sub Chassis. Mounting After wiring the sub-chassis, take the main chassis-cabinet. Mount on the front panel, from left to right as shown: Grid Meter; leave next hole open for crystal switch; panel bearing to which will be connected the variable capacitor mounted on the Final Sub Chassis by a 3 inch flexible shaft; 15 mmfd variable capacitor; 100 mmfd variable capacitor; Plate Meter. On the back panel mount the Gain Control, Power Plug, and antenna coax connector as shown . Mount the Exciter Sub-Chassis on the left as shown, mounting at the same time the crystal socket and crystal switch. Now back to the ground connections we were talking about. Using 3 separate wires or a 3-conduct.or cable, connect the 2-terminal plus ground tie lug to the B+ , A+ , and ground terminals on the Power Input Plug. Mount the Final Sub.Chassis in the center rear as shown. Connect the .001 mfd capacitor from the Exciter Sub-Chassis to the variable capacitor on the Final Sub-Chassis. Connect the A+ filament terminal on the tie lug to the A+ lug on the Power Input Plug. Connect the ground terminal on the tie lug to the ground lug on the Power Plug. Connect the 15 inch lead to the Grid Meter. Ground the other terminal on the Grid Meter. The B+ will be connected later. Attach a 3 inch flexible shaft from the variable capacitor on the Final Sub-Chassis to the panel bearing on the front panel. Connect a plate cap, output coupling capacitor, output coil, and 52 ohm coax to the front panel variable capacitors, antenna connector. and rf choke. The photo of the top view will aid you here, using the schematic for exact connections. The rf choke connects from the plate cap to the Plate Meter. The other meter terminal connects to the I-terminal tie lug on the Final Sub-Chassis through a shielded lead Mount the Modulator Sub-Chassis on the right. At the same time mount the microphone jack and modulation transformer. Connect the 2 shielded leads to the Gain Cou trol. Select the wires on the secondary of the modulatior transformer corresponding to 5000 ohms, ani connect one to the I-terminal tie lug on the Final Sub-Chassis. Connect the other to the B+ terminal on the Power Input Plug. De not solder the lead to the I-terminal tie IUE until after the testing section. Special Filament Consideration If fixed operation is intended WIth a 6 vof filament supply, wire the filaments as shown If mobile operation is considered with a H Fig . 5- Modulator Sub-Chassis: The two 6CZS sockets are at the left. The choke in the photo was wi red in the filament lead of the 6AN8. It was later found not to be necessary, but was left in.
olt filament supply, make the following hanges. Wire the two 5763 tube filaments in series. eplace the 2E26 tube with its 12-volt quivalent, 6893. Wire the two 6CZ5 tube ilaments in series. Replace the 6AN8 tube ith a 12CT8 tube (direct replacement). Testing Install the Exciter tubes and the 2E26 (6893) . Do not yet install the Modulator rubes. Plug in a crystal. Temporarily disconaect the modulation transformer wire connected to the I -terminal lug on the Final Sub-Chassis. Connect a 300 volt, 200 rna, 6 volt, 3.6 amp ( 12 volt, 1.8 amp ) power supply to the Power Input Plug and adjust the slug coil on the Exciter Sub-Chassis for maxi :num reading on the Grid Meter. If the recommended coil is used, the slug will be about • inch out of the coil. Disconnect the 300 {olts. Re-connect and solder the modulation ransformer wire. Install the tubes on the \ !odulation Sub-Chassis. Tuning The transmitter is extremely easy to tune. I'he general procedures are as follows: Close III 3 variable capacitors (full capacitance) . With power applied , crystal or vfo connected, md antenna connected , turn the knob conrected to the variable capacitor on the Final >ub-Chassis to get about 21> rna reading on :he Grid Meter. Then turn the 15 mmfd variible capacitor mounted on the front panel 'or minimum reading on the Plate Meter. If h is reading is about 60 rna, tuning is finished. I'his will depend upon antenna being used. If his reading, however, is much below 60 rna :45-55ma) turn the 100 mmfd variable caracitor mounted on the front panel until the Plate Meter reads slightly over 60 rna, and rgain. turn the panel-mounted 15 mmfd varirble in the same direction as before for mininum reading on the Plate Meter. That's all here is to it. Easy? You bet! Use a high impedance crystal or dynamic nicrophone, and do not ruin the superior iudio ability of the modulator by rewiring for , carbon mike. About a ~ turn of the Gain A ntral should provide the correct gain with he average crystal microphone. You now have a compact transmitter that vill literally give you years of trouble-free, iigh-performance operation. And when your irst QSO tells you you've got the finest souudng rig he's heard- and what? You're only unning 20 watts?-Sounds like 60! Just sit sack comfortably and smile. After all, it's not 'our fault he didn't build one of these units 0 0 . • .. W2BHT TRI-EX'S IMPROVED THD·471 GUYED TOWER shown wi th Internal ro tator, 2'" mast, Tei-B and Beam Choose f rom 8 models, 4 with 20 ft, sections, 4 with 10 ft. sections - all h otdipped g a lvan ized, inside and out, after fabrication. • Tower Heights to 88 It. • Easy to Erect • Cranks up & down • Gea red win ch • Aircraft raising cable • Ball-bearing pulleys • Precisionformed guides • Hinged base plate PRICES START AT FREE BROCHURE ri-Ex TOWER CORPORATION 7182 RASMUSSEN AVE. , VISALIA, CALIF.
Page 1 and 2: ~--.~ -- -- 50c (Not 75c, not even
Page 3 and 4: - - - 73 'IIagazine Nayne Green W2N
Page 6: ROHN • sets the ~ Standard Duty G
Page 9 and 10: CUST 1965 7 !I763 2El6 '---------+-
Page 11: Stronger Signals! Stronger Construc
Page 15 and 16: '. . I I I '. I: :I I I. • '\. \
Page 17 and 18: ohms. One caution to be observed is
Page 19 and 20: a K ssb station only ~ cents per wa
Page 21 and 22: ,..... ~, & ~ , ~ ~ ,r .cc ' " . 'H
Page 23 and 24: Here's the SPECTACULAR NEW ALL TRAN
Page 25 and 26: for discriminating amateurs who are
Page 27 and 28: eing multiplied more than three tim
Page 29 and 30: • LLANC ~ . ® ~. Tenna-Rntor for
Page 31 and 32: 3 5 When a switch must be actuated
Page 33 and 34: send today for your 508-page IIIEO
Page 35 and 36: 1IJGUST 196'\ • I , I Bottom view
Page 37 and 38: IT'S A CLASSIC! With the 2·K LINEA
Page 39 and 40: AIIr.IIC:T l C)'::
Page 41 and 42: THINK SMALL••• C....I!IlIEII
Page 43 and 44: Herbert Cross KIAMN 59 Fla gler Ave
Page 45 and 46: AUGUST 1965 Curing Distorted RTTY P
Page 47 and 48: was paying much attention to receiv
Page 49 and 50: AU GUST 1965 db BELOW 0. 1 MICROVOL
Page 51 and 52: A llr.lI
Page 53 and 54: ., NEW! SPRAGUE SUPPRESSIKITS FOR V
Page 55 and 56: (and have about 28 db gain, but tha
Page 57 and 58: A UGUST 1965 55 TRANSCEIVER HIT PAR
Page 59 and 60: AUGUST 1965 51 RED HOT LOW, LOW PRI
Page 61 and 62: A I rr.l lCT ' 0.01:
Page 63 and 64:
~ c o e ~... - ~ ~ ---------_......
Page 65 and 66:
SUBSCRIBE TO 73 Don't take a chance
Page 67 and 68:
••• BUILT-IN 12V DC AND 117V
Page 69 and 70:
them I had promised some of the boy
Page 71 and 72:
CRYSTALS are not all the same I .T
Page 73 and 74:
insulation to ground, and I was not
Page 75 and 76:
UCUST 1965 H Fig. 2 10 , • • --
Page 77 and 78:
at any latitude and longitude. All
Page 79 and 80:
PATENT PENDING MOBilE ANTENNA MOUNT
Page 81 and 82:
UNIVAC WIRED MEMORY PLANES As shown
Page 83 and 84:
?roblem . . . something not altoget
Page 85 and 86:
TS 418A 400- 1000 meg signal genera
Page 87 and 88:
ff P ack M onad nock M ountain (231
Page 89 and 90:
~~I'.I.1~"'I'.II'.I.1.1.1.1.1.1.1.1
Page 91 and 92:
member, organized pressure brings r
Page 93 and 94:
}ONSET G-50 : 10 hours u se. $2 10
Page 95 and 96:
More Letters THE BEST WAY TO BUY SU
Page 97 and 98:
"TAB" - TRANSISTORS - OIOOES II GTD
Page 99 and 100:
CAN BEAT OUR ANNIVERSARY SPECTACULA
show all

Amateur Radio Report Card

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?