Heathkit HW-30 Скачать руководство пользователя | Manualshive

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Содержание HW-30

Страница 1: ...PRICE 2 00 HEATHKIT MANUAL 1 j Copyright 1969 Heath Company All righrs reserved 2 METER TRANSCEIVER THE TWOER MODEL HW 30 595 364 1 9 70 ...

Страница 2: ... kW VARIABLE CAPACITOR r i I II 14 1 TRANSFORMER IRON CORE I II I I TRANSFORMER II EI ARROW I ECTION OF CORE I INDICATES DIR MOVEMENT TO INCREASE I NDUCTA CE BATTERY sivs f if 6 NEON H 111 e BULB 41C30 TRANSFORMER MN lilts ADJUSTABLE 0 CORE 4sol kt too TA PHONO JACK o 4 ILLUMINATING BULB E i E POWER TRANS FORMER _ __ _____ _ O 42 PHONE _ JACK l i fi RECEPTACLE 4 t1 INDUCTOR COIL 00 S P S T SWITCH ...

Страница 3: ... Section Wiring 22 Power Supply Section Wiring 23 Front Panel Assembly and Installation 24 Final Wiring Above Chassis 25 Final Wiring Below Chassis 26 Final Assembly 28 Connecting Cables 29 Initial Test and Calibration 32 Types of Antennas 37 Installation Information In Case of Difficulty 40 Troubleshooting Chart 41 Factory Repair Service 43 Schematic 43 Bibliography 44 Replacement Parts Price Lis...

Страница 4: ...tor preceded by RF pre amplifier stage Usable with signals as low as 1 microvolt at the antenna terminals 3 1 2 round Approximately 1 watt undistorted 143 0 mc to 149 0 mc Two silicon diodes in full wave voltage doubler circuit With built in supply 105 125 volts 50 60 cycle AC 45 watts With external supply 6 volt operation 6 volts at 2 35 amps 260 volts DC at 90 ma 12 volt operation 12 volts at1 2...

Страница 5: ...ur radiotelephone service Extensive proofbuilding and field testing over a period of several months have provided con clusive evidence that the HW 30 Transceiver will provide highly reliable service in its in tended application if assembled wired and adjusted in accordance with the instructions outlined in this manual It is therefore re commended that you follow the instructions carefully and make...

Страница 6: ...ier grid V4B is the final amplifier and operates straight through i e the input and output circuits are tuned to the same frequency RF output is coupled to the antenna through C17 and the transmit receive switch contact from a tap TO MODULATOR AND AUDIO DRIVER ANTENNA 144 M TRANSMIT RECEIVE 0 approximately 1 2 turn from the cold end of the final tank coil L4 The actual tap point is not critical an...

Страница 7: ...es the antenna from the oscillating detector mini mizing re radiation from the detector into the antenna The type of detector used is one which pro vides the most sensitivity for the number of components required and is superregenerative In a straight regenerative detector consider able sensitivity is achieved by adjusting the signal feedback of the detector for a near oscillating condition In the...

Страница 8: ...her 6 or 12 volt operation depending upon which power cable is in use For 117 V AC operation the power transformer provides 6 3 V AC for parallel wired filaments CONSTRUCTION NOTES This manual is supplied to assist you in every way to complete your kit with the least possible chance for error The arrangement shown is the result and trial If followed carefully the result will be a stable instrument...

Страница 9: ... 2 watt red red yellow 270 Kf2 1 2 watt red violet yellow 470 Ks2 1 2 watt yellow violet yellow 10 megohm 1 2 watt brown black blue 270 E2 1 2 watt red violet brown 68 KO 1 2 watt blue gray orange 150 n 1 2 watt brown green brown 8200 s 2 1 watt gray red red 22 KO 1 watt red red orange 10 KO 1 watt brown black orange 470 E2 2 watt yellow violet brown 330 E2 5 watt PART PARTS No Per Kit Capacitors ...

Страница 10: ...S DESCRIPITION No Per Kit Wire 340 3 344 58 344 2 1 Length 16 bare wire 1 Length 22 gray hookup wire 1 Length 18 stranded black wire 344 3 1 Length 18 stranded r al wire 346 1 1 Length sleeving 347 9 1 Length 3 conductor shielded cable Hardware 250 10 250 26 250 49 250 51 250 56 250 89 250 136 250 172 252 1 252 3 252 7 252 22 252 23 252 32 253 10 253 21 254 1 254 4 254 7 259 1 259 11 4 6 32 x 1 2 ...

Страница 11: ...int Keep the iron tip clean and bright by wiping it from time to time with a cloth CHASSIS WIRING AND SOLDERING 1 Unless otherwise indicated all wire used is the type with colored insulation hookup wire the size of the conductor is the same for all colors of hookup wires furnished with this kit In preparing a length of hookup wire 1 4 of insulation should be removed from each end unless directed o...

Страница 12: ... soldered until it is heated sufficiently to melt the solder ALLOW SOLDER TO FLOW COLD SOLDER JOINT CONNECTION MOVED WHILE COOLING 8 Then place the solder against the heated terminal and it will immediately flow over the joint use only enough solder to thor oughly wet the junction It is usually not necessary to fill the entire hole in the terminal with solder 9 Remove the solder and then the iron ...

Страница 13: ...al correspond to the actual configuration of the kit however in some instances the illustra tions may be slightly distorted to facilitate clearly showing all of the parts The abbreviation NS indicates that a con nection should not be soldered yet as other wires will be added When the last wire is installed the terminal should be soldered and the abbreviation S is used to indicate this Note that a ...

Страница 14: ... 40 186 OSCILLATOR PLATE COIL 45 48 75 mh RF CHOKE 40 332 TRIPLER COIL 40 335 FINAL TANK COIL 440 1 OCTAL PLUG CAP TUBULAR CAPACITOR 25 86 TWIST PRONG CAPACITOR 40 333 DETECTOR COIL OR DOUBLER COIL 45 37 1 8 u h RF CHOKE 40 334 ANTENNA COIL CERAMIC CAPACITOR 438 22 OCTAL PLUG 56 4 CRYSTAL DIODE 57 27 SILICON DIODE 434 4 OCTAL SOCKET PARTS PICTORIAL ...

Страница 15: ...412 36 NEON LAMP 434 38 CRYSTAL SOCKET SPEAKER BAFFLE PLATE 438 3 PHONE PLUG 423 1 FUSE HOLDER ago oi 432 1 MICROPHONE CONNECTOR CABLE 462 86 KNOB 435 1 OCTAL SOCKET RING 434 75 9 PIN CERAMIC SOCKET 10 59 CONTROL 436 6 PHONE JACK 421 1 FUSE 432 3 MICROPHONE CONNECTOR CHASSIS 462 85 KNOB 391 5 NAMEPLATE 481 1 4 PRONG CAPACITOR MOUNTING WAFER PARTS PICTORIAL ...

Страница 16: ...L NUT OMMINN 3 48 x 3 8 SCREW 6 SPEEDNUT 0 0 CONTROL WASHER 9 16 FLAT WASHER 0 3 LOCKWASHER 6 SPADE TERMINAL 3 0 73 1 3 8 GROMMET 434 42 PHONO SOCKET 0 ca o 431 40 4 LUG TERMINAL STRIP 431 1 1 LUG TERMINAL STRIP 0q 0 0 O 431 10 431 5 3 LUG TERMINAL STRIP 4 LUG TERMINAL STRIP O 3 48 NUT 6 32 KNURLED THUMBNUT 0 6 LOCKNASHER 73 4 5 16 GROMMET 438 4 PHONO PLUG 0 7 ea 431 38 3 LUG TERMINAL STRIP 431 14...

Страница 17: ... socket Install a 3 8 rubber grommet at locations H and J Similarly install a 5 16 rubber grommet in hole U Locate the octal power plug 438 22 and the retaining ring 435 1 Referring to De tail 1B mount the octal plug at C Position the key on the power plug so that it is point ing toward the bottom edge of the flange Se cure the plug with the retaining ring Mount the 250 KEZ control B Referring to ...

Страница 18: ...1 7 a 1 MOD OUT TRANS 1 51 94 imi 1 _ _ p34 5 S POWER TRANS ow 54 87 en Pictorial 1 ...

Страница 19: ...1 2b POWER TRANS otg 54 87 e3 Pictorial 1 ...

Страница 20: ... audio transformer 51 94 leads to the following lengths Color Length Brown 3 1 2 Red 4 3 4 Blue 3 3 4 Black 3 1 2 Yellow 3 1 2 6 32X V4 SCREW YELLOW RED BLUE BROWN 6 LOCKWASHER 6 32 NUT 6 LOCKWASHER 4L Detail lE 6 32 NUT Referring to Detail 1E mount the combina tion modulation audio 51 94 transformer and 3 lug terminal strip N Orient the trans former so that the red blue andbrown leads are next to...

Страница 21: ...switch at X Use a control lockwasher control flat washer and nut Similarly mount the TRANSMIT RECEIVE switch Z noting Pictorial 1 and Detail 1G Momentarily place the lever knob 462 86 on the switch shaft and check proper orienta tion of the switch against the switch lever positions indicated on the CONTROL FUNC TION drawing fold out from Page 18 Detail 1G FLAT SIDE OF SHAFT SHOULD FACE AS SHOWN WI...

Страница 22: ...re from lug 3 of tube sock et V2 NS to lug 9 of tube socket VI NS Connect a 5 1 2 wire from lug 3 of tube socket V2 NS to lug 1 of terminal strip S NS Strip 5 8 of insulation from one end of a 7 3 4 wire Connect this end to pin 3 of power plug C S 1 Connect the other end of this wire to lug 3 of tube socket V2 S 3 Connect a 3 1 4 wire from lug 1 of terminal strip S NS to lug 4 of tube socket V4 NS...

Страница 23: ...U It will be connected later NOTE For the following steps use the heavy bare wire or use completely stripped hookup wire whichever is indicated When using or dinary hookup wire it is usually best to wrap the leads around the lugs However it is sug gested that you do not attempt to wrap the heavy bare wire since you may damage the component Connect a length of stripped hookup wire between lug 3 NS ...

Страница 24: ...3 Connect a 100 KO brown black yellow resistor from lug 7 of tube socket V5 NS to the ground lug nearest lug 6 of V5 S 2 REMOVE INSULATION Detail 3A Connect a length of stripped hookup wire from lug 8 of tube socket V5 NS to lug 2 of crystal socket M NS C3 Connect a 10 µµf capacitor from lug 8 of tube socket V5 S 2 to the ground lug nearest lug 1 of V5 S 3 C8 Connect another 10 p p f capacitor fro...

Страница 25: ......

Страница 26: ...1 7b Pictorial 2 ...

Страница 27: ...See Detail 4A Detail 4A WIRE TRIMMED TO 4 MOM TRIMMED FLUST WIRE BOTTOM INSIDE OF CHASSIS e Mount the doubler coil CE 40 333 Handle this coil carefully since the ceramic form can break easily C12 Connect a 001 µid disc ceramic ca pacitor from lug 2 of coil CE NS to lug 1 of tube socket V4 S 2 Mount the tripler plate coil CD 40 332 C9 Connect a 001 p fd disc ceramic capac itor from lug 2 of coil CD...

Страница 28: ... speaker to suit your indi vidual desire A switch at the counterclock wise end of rotation disconnects the unit from its power source TUNING Control Permits the receiver to be tuned at will Note that this control has NO effect on transmitter frequency TRANSMIT RECEIVE Switch The middle or RECEIVE position actuates the receiver section of the HW 30 Pushing the knob down permits short transmissions ...

Страница 29: ...g 3 of tube socket V5 S 2 C7 Connect a 001 p fd disc ceramic capa citor from lug 4 of tube socket V5 S 2 to the center post of V5 NS C2 Connect a 001 pid disc ceramic capa citor from lug 5 5 2 to the center lug of V5 S 4 Install the 001 Ad feed through capacitor T Use the nut furnished with the capacitor Do not overtighten this capacitor since you may crack the insulating material See Detail 4B FO...

Страница 30: ...L and lug 6 of tube socket V4 RECEIVER SECTION WIRING Refer to Pictorial 5 for the following steps C25 Connect a 001 µfd disc ceramic capac itor from lug 1 of terminal strip S NS to the ground lug nearest lug 6 of tube socket V3 NS C26 Connect another 001 µfd disc ceramic capacitor from lug 2 of terminal strip S NS to the ground lug nearest lug 6 of tube socket V3 NS R9 Connect a 270 n red violet ...

Страница 31: ...F choke from lug 5 of tube sock et V3 S 1 to lugl of terminal strip S S 4 Connect another RF choke from lug 6 of tube socket V3 S 2 to lug 2 of terminal strip S S 4 C29 Connect a 001 Ad disc ceramic capac itor from lug 1 of tube socket V3 S 2 to the center lug of V3 NS C22 Connect another 001 p fd disc ceramic capacitor from lug 8 of tube socket V3 S 2 to the center post of V3 S 4 C20 Connect the ...

Страница 32: ...minal strip Q NS Pictorial 8 R24 Connect a 470 KIZ yellow violet yel low resistor from lug 1 of tube socket V1 NS to lug 1 of terminal strip Q NS R17 Connect a 68 Kg blue gray orange resistor between lugs 6 S 3 and 5 S 2 of tube socket V2 C39 Connect a 001 µfd disc ceramic capac itor from lug 9 of tube socket V1 S 2 to lug 2 of terminal strip Q NS R19 Connect a 270 KSZ red violet yellow resistor f...

Страница 33: ...capacitor I S 4 to lug 2 of terminal strip K NS Position this re sistor away from the chassis C31 Connect a 100 p fd 200 volt electro lytic capacitor from lug 2 of terminal strip L S 2 to lug 3 of terminal strip K S 1 Make sure that the plus end of this ca pacitor is connected as shown in Pictorial 9 C32 Connect the other 100 p fd 200 volt electrolytic capacitor from lug 2 of terminal strip K NS t...

Страница 34: ...h the concave side of the speednut toward the front panel Then insert the neon lamp into the lens SPEAKER 6 32 NUT 4 LOCKWAS HE R 3 9 16 FLAT WASHER BAFFLE PLATE PAINTED SURFACE GRILLE PANEL 6 32r 3 8 SCREW 4 ADHESIVE TAPE Similarly mount the red lens and neon lamp at the hole marked TRANS Mount the HEATHKIT nameplate at the two holes above the words THE TWOER Melt the pins of the nameplate with a...

Страница 35: ...ighten securely See Detail 10A Now tighten the control capacitor and switch mounting nuts Hold the components so that they do not turn NUT SUPPLIED WITH CONNECTOR CONTROL FLAT WASHER CONTROL LOCKWASHER 17 DISCARD SOLDER LUG 4 1 SUPPLIED WITH CONNECTOR _ e_____ CHA SSI S i FRONT PANEL 432 3 MICROPHONE MICROPHONE CONNECTOR Detail 10A FINAL WIRING ABOVE CHASSIS Refer to Pictorial 11 fold out from Pag...

Страница 36: ... terminal strip F Use a 6 32 x 3 8 screw 6 lock washer and 6 32 nut for the double mounting as shown in Detail 12B Mount the phone jack at location G Use a control lockwasher control flat washer and nut Connect an RF choke 45 37 from lug 1 of phono socket E NS to solder lug D S 1 See Pictorial 12 C19 Connect a 001 pid disc ceramic capac itor between lugs 2 NS and 4 NS of phone jack G C42 Connect a...

Страница 37: ...nal strip F to lug 2 of F S 3 Connect the other lead of the crystal diode to lug 1 of phono socket E Pictorial 12 S 3 Use care when soldering the connec tions concerning the diode since it can be damaged by excessive heat A heat sink can be made by gripping the lead between the diode body and the solder connection with long nose pliers Install a speednut at each corner of the chassis back apron Be...

Страница 38: ...e cap over the socket Check the line cord and socket pins with an ohmmeter to be sure no connections exist between socket pins other than those shown NOTE The blue and white identification label shows the Model Number and Production Series Number of your kit Refer to these numbers in any communications with the Heath Company this assures you that you will receive the most complete and up to date i...

Страница 39: ...e 3 of the outer jacket from the 3 conductor shielded cable Strip 3 4 of the jacket from the other end On both ends of the cable break the leads out the side of the shield braid as shown in Figure 3 Strip all the leads 1 4 Cut and remove inner insulation Pull the slack out of the shield braid pig tails and cut them to the same length as the black leads at both ends of the cable NOTE Determine the ...

Страница 40: ...ap from the grommet side Strip the heavy red and black leads 5 8 on one end and 1 4 onthe other Tin the leads Pass the ends stripped 1 4 through the octal plug cap where they will be used in the following steps The ends stripped 5 8 are for connection to the power source Connect the heavy red lead to lug 7 of the octal socket 434 4 S 1 Connect the small red lead from the shield ed cable to lug 5 o...

Страница 41: ...white leads Connect both the black lead and the shield pigtail to the remaining spade terminal in similar man ner DUMMY LOAD CONSTRUCTION 47 LAMP DUMMY LOAD SLEEVING PHONO PLUG WIRE Figure 7 Construct the dummy load by carefully following Figure 7 NOTE Use care in soldering to the solder blob at the tip of the 47 lamp to avoid damaging the lamp It might be wise to now recheck the HW 30 wiring once...

Страница 42: ...3 1 a 0 Pictorial 11 ...

Страница 43: ...31b FUSE Pictorial 11 ...

Страница 44: ...it off Install all tubes V1 12AX7 V2 6AQ5 V3 6BS8 V4 6BA8 and V5 6BA8 See Figure 8 Set the TRANSMIT RECEIVE switch to the RECEIVE position and TUNING control to full counterclockwise end of rotation Rotate the REGENERATION control on the rear chassis apron full counterclock wise Turn the unit on and advance the VOLUME control until the knob pointer is vertical Now slowly advance the REGENERATION c...

Страница 45: ...TAL SOCKET OSCILLATOR COIL DETECTOR COIL POWER TRANSFORMER 44 54 87 RECEIVER ANTENNA COIL TRIPLER COIL ANTENNA METER CONNECTOR GROUND JACK Th b S POST vio LUG I POWER CONNECTOR R EGENERAT CONTROL qZ 4 Figure 8 ...

Страница 46: ...32b VER 7ORMER 87 POWER CONNECTOR REGENERATION CONTROL FUSE HOLDER MODULATION AND AUDIO OUTPUT TRANSFORMER r 5I 94 igure 8 ...

Страница 47: ...st predominant case it is not the only instance in which improper output can be ob tained For this reason complete the following steps EXACTLY An accurate grid dip meter is very handy if available and should be used in the diode position Any grid dipping should be done with all tubes installed and filaments lit The grid dipper is used as a loosely coupled absorption device rather than as an oscill...

Страница 48: ...hassis Leave the meter connections at the same points Again momentarily place the TRANSMIT RECEIVE switch in TRANS and adjust the doubler plate coil L3 for maxi mum indicated DC voltage This adjustment should cause approximately an additional several volt rise in screen voltage and should be a slight peak If more than one slight peak should exist the correct one is the first one encountered as the...

Страница 49: ... milliamperes at resonance It would be well to compare the typical shaft height above chassis coil settings and if possible check the final amplifier output frequency with a grid dipper or absorption wavemeter Attach the microphone to the front panel connector With the unit in the TRANS position talking in the microphone should cause the dummy load to glow brighter and the meter reading to increas...

Страница 50: ... within several turns of the preset position The peak will be rather broad in nature al though a definite increase in gain will be noted as the coil is tuned near 146 mc resonance Recheck the adjustments of the detector coil L6 for calibration the antenna coil L5 for gain and the regeneration control Rh for maximum sensitivity With the two coils properly adjusted set the regeneration con trol to t...

Страница 51: ...number of parasitic elements used This means in effect that both transmitted and received signals will be up to 50 to 60 times EACH ELEMENT APPROXIMATELY 19f GROUND PLANE ANTENNA AL TYPE I Figure 11 stronger in signal strength in the direction of maximum radiation than when a simple doublet is used In viewing Figure 12 it is apparent that some means of turning the antenna is required unless point ...

Страница 52: ...ne the coaxial balun Figure 13 is preferred due to its exposure to outdoor con ditions Figure 13B is a schematic view of a balun coil For experimental purposes only certain types of television antennas will work to a fair degree at 144 mc The notable one in this category is a conical type in which case the coil balun would be used to feed the 300 n TV twin lead to the antenna In general most TV an...

Страница 53: ...er mobile installations boats etc See Figures 14 and 15 Figure 15 INFORMATION In a mobile installation the antenna system is of great importance Any mobile system is at a decided disadvantage due to the lack of a good earth ground the only ground being the capacitive coupling between the vehicle body and the earth below With few exceptions the antenna best suited for mobile service will be either ...

Страница 54: ...lead will require a short additional connecting lead of 10 gauge wire The capacitor case is grounded using the same screw which held the old capac itor in place IN CASE OF DIFFICULTY 1 Recheck the wiring Trace each lead in colored pencil on the Pictorial as it is checked It is frequently helpful to have a friend check your work Someone who is not familiar with the unit may notice something consist...

Страница 55: ...ctivity crystal substitute another crystal for comparison check f B voltage too high or low checkpower supply voltages Check for leaky capacitors open or shorted resistors at the power supply Check transformer voltages 5 Strong signal from transmitter but no modulation a Faulty microphone or connections recheck b Faulty tubes check Vi and V2 voltages c Wiring error recheck V2 and V2 wiring d Short...

Страница 56: ...Page 42 ...

Страница 57: ...s Date of purchase A brief description of the difficulty The invoice or sales slip or a copy of either Your authorization to ship the repaired unit back to you C O D for the service and shipping charges plus the cost of parts not covered by the warranty Attach the envelope containing one copy of this letter directly to the unit before packaging so that we do not overlook this important information...

Страница 58: ... DUMMY LOAD PLUGGED IN AND CONTROLS SET AS FOLLOWS VOLUME CONTROL ANY POSITION ON TUNING CAPACITOR ANY POSITION REGENERATION ADJUSTED FOR NORMAL RECEPTION MICROPHONE DISCONNECTED READINGS ON V1 V2 V4 AND V5 WITH SWITCH IN TRANSMIT READINGS ON V3 WITH SWITCH IN RECEIVE PRESENCE OF METER PROBE IN TRANSMITTER SECTION WILT CAUSE DE TUNING IN MANY CASES VALUES SHOWN ARE APPROXIMATE ONLY AND DEPENDENT U...

Страница 59: ...C 2 6B K V 3 B 1 2 6B58 RFC 5 3D 0011 UFD VOLUME 470K 001 UFD 3D GEM 470K VIB 1 2 12AX7 001 UFD COMMON BLACK 1F1261 3D 10 MEG 001 UFD 001 3D UFD NE 2E 150 K TRANSMITTER IC401 001 UFD RFC 8 I2VDC POWER CABLE FILAMENT JUMPER 6VDC POWER CABLE FILAMENT JUMPER CERAMIC MICROPHONE CONNECTION OF DC POWER CABLES TO POWER SUPPLY VIBRATOR PACK OR EQUIVALENT 3 CONDUCTOR SHIELDED CABLE E1 I MEG 260V 90 MA FROM...

Страница 60: ...nnecticut ARRL ANTENNA BOOK American Radio Relay League West Hartford Connecticut Editors and Engineers RADIO HANDBOOK Editors and Engineers Summerland Cali fornia Suppressed Ignition For Two Way Radio Instal lations bulletin M1544 Electric Auto Lite Co Toledo Ohio VHF HANDBOOK by Orr and Johnson ...

Страница 61: ... 40 40 332 1 00 40 333 55 40 334 70 40 335 15 45 37 25 45 48 60 Oscillator plate coil Tripler coil Detector and doubler Antenna coil Final tank coil RF choke RF choke coil PART PRICE DESCRIPTION No Each TERMINAL STRIPS SOCKETS PLUGS 431 1 10 431 5 10 431 10 10 431 14 10 431 38 10 431 40 10 432 1 35 432 3 25 434 4 30 434 15 10 434 38 20 434 42 10 434 75 25 434 77 15 435 1 10 436 6 75 438 3 45 438 4...

Страница 62: ...ommet 89 1 35 Line cord 211 16 25 Plastic handle 261 9 05 Rubber foot 391 5 20 Nameplate 401 21 2 15 Speaker 413 10 10 Red lens 413 11 10 Clear lens 421 1 10 1 1 2 ampere fuse 421 4 20 8 ampere fuse 423 1 55 Fuse holder 462 85 30 Knob w gold insert and indicator dot 462 86 40 Knob lever type w gold insert and indicator line 480 8 5 00 Microphone 481 1 10 4 prong capacitor mounting wafer 331 6 15 S...

Страница 63: ...LACK for mains connection Connect and solder BLACK GREEN to BLACK YELLOW and insulate For 110 VAC Connect BLACK RED and BLACK YELLOW in common also BLACK GREEN and BLACK in common for mains connection IMPORTANT This transformer has a 12 6 VAC secondary winding for valve heater Connect a link between pins 2 and 4 only on mains power input plug Part No 597 600 HW 30 2 19 11 70 ...

Страница 64: ...HEATH COMPANY THE WORLD S FINEST ELECTRONIC EQUIPMENT IN KIT FORM LITHO IN U S A ...

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