Page 1: ...SiTIEi FITTY trIEMcIDTJLATcIFI INSTRUCTION MANUAL HAL COMMUNICATIONS CORP BOX 365 URBANA ILLINOIS 61801 QU ALITY COM M U NICATIONS EQ U I PM ENT...
Page 2: ...by HAL Communications Corp i n the Un i ted States of Amer i ca Al I r i ghts publ ication may not be reproduced in any form sion of the copyright owner Urbana lllinois Printed reserved Contents of th...
Page 3: ...2 25 26 27 2B PARTS LI ST Figure I Fi gure 2 Fi gure 3 Fi gure 4 Figure 5 Figure 6 Figure 7 Fi sure B Figure 9 Fi gure I 0 Figure I I ST 5 Schemat i c ST 5 Power Supply ST 5 Power Supply ST 5 Demodula...
Page 4: ...high gain slicer stage assures that keying pulses from the sol id state keyer have the fast switch ing t imes necessary for Iow distortion keying of a teleprinter The internal power supply of the ST...
Page 5: ...5 Hz Standard 1275 Hz Low Tones Space Frequency 170 Hz shift 2295 Hz Standard I Ir45 Hz Low Tones Space Frequency 850 Hz shift 2975 Hz Standard 2125 Hz Low Tones Discriminator Filter Bandwidth 140 Hz...
Page 6: ...egraph key may be connected to the FSK system to provide narrow shift CW lD transmission A separate potentiometer is provided to allow adjustment of the CW shift SCOPE AC voltages proportional to the...
Page 7: ...uit ntZ Rl3 Rl4 Rl5 to the discrimirrator fi lters Proper adjustment of Rl3 aiscussed in Section 5 al lows balancing of the amplitude and bandwidths of the mark and space filters of the discriminators...
Page 8: ...filtering of the a c component Transistor Ql is an emitter fol Iower current ampl if ier that drives the meter through Rl5 and Rl8 Since both mark and space signals provide a positive current to the m...
Page 9: ...he loop supply 175 volts appears across Rl07 and the loop current is therefore control Ied by RI07 The junct ion of Rl05 and Rl07 is there fore at approximately 155 vo l ts and the junct ion of R104 R...
Page 10: ...ished with the ST 5 Kit Connections for either primary voltage are shown in Figure l Swi tch 53 al lows defeat of the keyer stage Q2 when no RTTY signals are received or when it is desired to transmit...
Page 11: ...mponents are small only a moderate amount of heat is needed to make good solder joints Use a l5 to 25 watt iron with a penci l tip or smal l l 8 chisel tip 2 When soldering components to the printed c...
Page 12: ...08 The at this time to observe electrolytic power supply board itself 0ther in the cabinet lnspect all found This completes the assembly of the connections wi I I be made upon instal Iation solder con...
Page 13: ...ing capacitors if needed Finally install the two 88 mHy toroidal coils being careful to connect the leads as shown see Figures 6 and 7 for connection and mounting details strip enamel from the wires a...
Page 14: ...sure that the green wire connects directly to chassis ground and that the black wire connects to the fuse first and then to the AC power switch and then to the power transformer The white wire shourl...
Page 15: ...URE TO DO SO COULD PRESENT A SHOCK HAZARD LEAD TO RF I NTERFERENCE PROBLEMS AND I LL VO I D ANY ARRANTY BY HAL COMMUNI CATI ONS Turn the AC Power switch on The pilot lamp should I ight Make the follow...
Page 16: ...adjusted Connect a frequency counter or other accurate frequency measuring device to the audio oscil lator Since the discriminator tuned circuits have a relatively wide bandwidth measurement of the f...
Page 17: ...rnay not be equa to 0 7 lf not adjust RIB to give a 0 7 ma meter indication Next locate the center frequency of the space ci rcuit and adjust Rl3 for a meter reading of 0 7 ma As before compute the c...
Page 18: ...ohm output of the receiver be used if avai l able lf this out put is not available the ST 5 wil I work when driven f rom a 4 to B ohm voice coil output but at the sacrif ice of 30 to 40 dB of I imiter...
Page 19: ...connections to or from the AK l and or the ST 5AS options the pertinent manual should be consulted for proper connections A typical RTTY station with the ST 5 and other equipment is shown in Figure 8...
Page 20: ...7 SCHEMATIC AND WIRING DIAGRAMS The schematic circuit board Iayouts and photographs and wiring diagrams are shown on the following pages t7...
Page 21: ...o F e d dt o o E gl r ri ol zl ob cY ii qA 1 I I I I I flr lri ai o 9 nEO r E i s o Y E qfs5 o E o l u tt Lr ll F a 6 c 6 ya 9F trY o FN o EH F 1 ii a 9d o Xd r EE o L 3 lr E z d o o _____t o O iE s3...
Page 22: ...LrJ o t E L I o GI o 6 L a i r gz in D n3 t7 o L OF oz Jf o i r F e E ooJzz lr t l gr ts c tca 9O o l E G lrJ slaE FiP o o z ts F F E a UJ o9 l o c t o F 1 a L P3 o C O JY J 9 FD 9 z U o 5r lO o o tt...
Page 23: ...ST 5 Power Supply Board 20 Figure 3...
Page 24: ...F ool L u Froo l C j rfi i rr frJ F o F 5p Ei x6 d S pH o E o E 2 o tr CD F Za Aoo o 2 o fr3 1 Z J i m PB E 53 o Nl e oofZ S t txll o L A o N N d 6 R GQ lO F l L_ z H sP otL l a ro D Y l e 95 aF Hba...
Page 25: ...ffi w ST 5 Demodulator Board Figure 5 22...
Page 26: ...TAN DARD aa r tl s iiL_ MULTICOLOR llil L 88 la mHl L OUTER INNER SERIES CONNECTION 88 mH PARALLEL CONNECTION 22 mH Toroid Wiring 23 CT CENTER TAP L 22r rttlltlffr rrrffirrrt GRN hffirr RED 2 Figure 6...
Page 27: ...TOROID RETAINER TUNEADED TOROID TOROID I c 6 LOCK WASHER I s 6 32 x t scRrw Toroid Mount i ng 24 I Y I I Y I coMPoNENT SIDE W l CIRCU IT BOARD coPPER SIDE I __ NYLoN WASHER ll tt _ _ I 6 LOCK WASHER t...
Page 28: ...5r u edil r Eisl iExr 5 i9or o ol J ai n UF 5o 9 C o E u o UJ 1l E l U o F F o c GI JY 5P X i N l eOsE fr EH d l l J E o F oa l l FO oO E 6 u et F q aa rd i e l_Li F I E u q5 o F f 1 1 S _ r li rlil t...
Page 29: ...PLUG J2 TO 5OOO AF OUTPUT ON R ECE IVER DIODE KEYER AK 1 OR RVD lO05 HAN DKEY TSX CW ID TO VERTICAL INPUT TO HORIZONTAL INPUT n TO 4O AF ll r OUTPUT ON llq RECET ER I FSK OUTPUT TO I I I I I I _J I I...
Page 30: ...MALE r CON N ECTOR BLOCK FEMALE Figure I 0 Loop Plug Preparation Q SOLDER r INSERT PIN LOCKED 27...
Page 31: ...I So oP go lo o F P c o E o f o lrl L o c o o l J c 9 J u c c c o u L o c o L f o L r o9 lrJ F al g OF J I2 Fi l tJ 3Q o i U o 88 f o lr o o I JO T E l l r qs ots 3d ts lrt trJ trJ E 2B...
Page 32: ...l5 vDC 0 D electrolytic electrolytic z t t t s e z w 709 2N5655 or MJE340 MPS 33 94 N 270 N4148 ru4005 Nt 7 2 BB mhy toroid SPST toggl e DPDT toggl e 500 ma l zn fuse strain rel ief phono jack phono p...
Page 33: ...of purchase and the possible defecr 3 Hold the unit until a written return authorization is received Return the unit freight prepaid upon the receipt of the written return authorization Correct i ns...
