Heathkit-GD-125Q-Manual 电路图 维修手册.pdf

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1、PI . r3:E.A.Tr3:KI T Q MULTIPLIE MODEL GD-125 RadioFans.CN 收音机爱 好者资料库 , TYPICAL COMPONENT TYP S This chart is a guide to commonly used types of elec tions should prove helpful in identifying most parts and tronic components. The symbols and related illustra- reading the schematic diagrams. RESISTOR

2、CAPAC ITOR W.AJt,. -wwv -1 t-A POTENTIOME ERo (CONTROL) ;.- -wvvr- t ELECTROLYT IC m CAPACITOR -1t=W . P L AT E g -S U P P RE SSOR -SCR EEN -GR ID TUBE CATHOD E :.-flLAM EN T p CO L L ECTOR TR ANSISTOR c-: BASE EM I TT ER C OLLE CT OR B NPN EM ITTER ., . NEON BULB FUSE . :.-;. ILLUMINAT(5;9NG. ./ BU

3、LB ., /h ,I, / . I, - SPST SWITCH (TOGGLE) -.-.r r _.-. DPDT -B-METER W R E C T I F I E. . . . (DIODE) . : )Y CONDUCTORS +-r - NOT CONNECTED SHIELDED CONNECTED PHONE JACK EARTH GROUND PHONO o-JACK () , CROPHO CHASSIS GROUND VARIABLE CAPACITOR -1t./ riIRECEPTACLE. . / !T -wt 1 , LOOP B INDING POST TR

4、ANSFORMER (A DJ U STA B L E POWDERED IRON CORE) ARROW t INDICATES DIR ECTI ON OF CORE MOVEM E NT TO I NC REA SE INDUCTANC E INDUCTOR (COIL) C POWER T RANS FORMER G T ANTENNA GENERAL TRANSFORMER ( ADJUSTABLE CORE) : : I I I I PIEZOELECTR IC D CRYSTAL RadioFans.CN 收音机爱 好者资料库 Assembly and Operation of

5、the #k Q MULTIPLIER MODE L 6 0 - 1 2 5 H EA T H COMPANY, BEN T O N H A R B O R , MIC H IGA N TABLE OF CONTENTS Introduction. 2 Par ts List. 3 Step-By-Step Assembly Chas s is As s embly. 4 Function Switch Wiring. 6 Installation. 12 Alignment. 13 Oper ation. 15 In Cas e Of Difficulty. 16 Specification

6、s. 16 Cir cuit Descr iption. 17 Sche matic(foldout from page). 19 Ccpyri ghl r965 Heath Compa ny ,ill .(I.IJ .ru.tr,( 12-17-65 RadioFans.CN 收音机爱 好者资料库 Page 2 - INTRODUCTION The Heathkit Model GD-125 Q Multiplier is used with communications receivers to provide addi tional selectivity and signal reje

7、ction. Because its peak or null effect can be tuned across the receiver IF bandpass, the operation of the Q Multiplier is more flexible than that of a fixed frequency IF filter. The Q Multiplier may also be used with a re ceiver which already has an IF filter, to obtain two simultaneous functions. F

8、or example, the IF filter could be set to peak the desired signal and the Q Multiplier used to null an adjacent signal. When properly connected and adjusted, the Q Multiplier will not decrease receiver sensitivity. In the peak function, an audible gain will be noted on CW signals, and a carrier gain

9、 will be noted on the S meter for phone signals. However, the audio will be attenuated slightly due to narrowing of the received sidebands. The reduced sideband reception will tend to attenuate the higher audio frequencies. This is more than compensated for by the increased readability against the s

10、urrounding QRM. NOTE: Refer to the Kit Builders Guide for complete information on unpacking, parts identi fication, tools, wiring, soldering, and step-by step assembly procedures. Page 3 - PARTS LIST The numbers in parentheses are keyed to the numbers on the Parts Pictorial (fold-out from Page 3). T

11、he instructions in the Kit Builders Guide show you how to identify resistors and capacitors. PART PARTS DESCRIPTION PART PARTS DESCRIPTION No. Per Kit PerKit RE SISTORS Hardware (contd. (15)252-15 2 4-40 nut 1/2 Watt (16)252-3 5 6-32 nut j (1)1-9 1 1000 n (brown-black-red) / (17)252-7 3 Control nut

12、1-11 1 1500 n (brown-green-red) I (18) 252-9 1 Push-on speednut 1-13 2 2700 n (red-violet-red) ,V (19) 253-10 3 Control flat washer 1-19 1 5600 n (green-blue-red) J j (20) 254-9 6 #4 lockwasher 1-23 1 27 Kn (red-violet-orange) (21) 254-1 7 #6 lockwasher 1-25 1 ,j47 Kn (yellow-violet-orange)/(22) 259

13、-1 1 #6 solder lug 1-26 1 100 Kn (brown-black-yellow).J(23) 254-4 2 Control lockwasher 1-29 1 220 Kn (red-red-yellow) J (24) 259-10 1 Control solder lug 1-37 2 2.2 megohm (red-red-green) J 25)259-11 2 Spade lug WIRE- SL EEVING 1 Watt 89-1 1 Line cord / / (2) l A-7 1 47 Kn (yellow-viOlet-orange).) 34

14、3-2 1 Coaxial cable 344-59 1 Hookup wire V 346-1 1 Sleeving V MISCELLANEOUS CAPACITORS 510 JlJlf mica J (26)57-27 1 jSilicon diod , 750 rna, (3)20-42 1 20-53 1 .0011 ufd mica (1100 Jluf) / 5?0PIV . . 20-54 1 0033 ufd mic 330 fJ.Jlf) / (27) 75-24 1 Lme cord stram relIefl/ :005 ufd disc / (28) 205-254

15、 1 Alignment tool blade ,/ (4)21-27 4 (5)25-80 1 20-20 Jlfd electrolytic ./ 261-4 4 Rubber feet) (6)26-28 1 100 u uf variable J 411-26 1 12AX7 tube / v (29) 412-13 1 Neon lamp (30) 431-51 1 2-lug terminal strip v/ (31) 431-55 1 6-lug terminal strip ,/ (32) 434-42 1 Phono socket V (33) 434-56 1 9-pin

16、 tube socket / CONTROLS- SWITCH-TRANSFORMER-OILS (34) 438-4 2 Phono plug / / (7) 10-7 2 5000 n control .j 462-140 1 Knob (large) I (8)63-288 1 4-position rotary switch 462-159 3 Knob (small) ./ 54-2 1 Power transformer .; (35) 100-M357 1 Pointer assembly / (9)40-67 1 1.5 -3.0 mh coil ./ 90-M331F 1 C

17、abinet top shell V (10) 40-68 1 120-150 uh coil ./ 90-M330P262 1 Cabinet base j 200-M453 1 Chassis v HARDWARE 490-5 1 Nut starter./ (11) 250-52 6 4-40 X 1/4 screw 331-6 Solder J (12) 250-89 5 6-32 x 3/8 screw 597-308 1 Kit Builders Guide v (13) 250 -155 4 #6 sheet metal screw 595-775 1 Manual J (14)

18、 250-15 1 8-32 setscrew 1 Identification label J PARTS PICTORIAL CD CD =I:.l= -4I:IID= Y CD y Q) g + r 0 0 Cj:) : ;.:. ., f . . ; a4f ) J o o o o a o o PICTORIAL 5 - Page 4 STEP-BY-STEP ASSEMBLY Before starting to assemble this kit, read the Kit Builders Guide for complete information on wiring, sol

19、dering, and Step-By-Step Assembly procedures. CHASSIS ASSEMBLY Refer to Pictorial 1 for the following steps. ( J Locate the chassis and position it as shown. (.I) Refer to Detail lA and mount the 9-pin tube socket at VI with 4-40 x 1/4 screws, #4 lockwashers, and 4-40 nuts. Position the blank space

20、as shown by the arrow on Pictorial 1. 4 - 40 NUT #4 LOCKWASHER 1, 1. , J J PICTORIAL 1 4-40 xl/4 SCREW Detail lA Locate the 100 LLf variable capacitor and clip off lug 2 as shown in Detail lB. I (v) Refer to Detail 1B and mount the 100 LLf variable capacitor at C with four 4-40 x 1/4 screws and #4 l

21、ockwashers, 6lJ(.,11l,.-CUT OFF LUG V A R I A B L E CAPA C I TO R Detail 1B Page 5 - , 120-150 H COl L (# 40 - 681 Detail lC (.jRefer to Detail lC and mount the 120-150 fJ.h coil (#40-68) at A. Place the locating tab on the coil mounting clip into the slot in the mounting hole. Mount the 1.5-3.0 mh

22、coil (#40-67) at D. Refer to Pictorial 2 for the following steps. Connect a .0011 ufd (1100 fJ.fJ.f) mica ca pacitor from lug 1 of coil A (N8) to ground lug B on tube socket VI (N8). Connect a .005 ufd disc capacitor from lug 1 of coil D (8-1) to ground lug C on tube socket VI (N8). / ( /) Connect a

23、 1500 n (brown-green-red) re sistor from lug 3 (8-1) to ground lugC (N8) of tube socket VI. (V Connect a 2.2 megohm (red-red-green) re sistor from lug 2 (N8) to ground lug C (8-3) of tube socket VI. I (,/) Connect a .005 fJ.fd from lug 2 of coil D (N8) to lug 1 of tube socket VI (N8). Place a 1-1/ 4

24、 length of sleeving over one lead of a .005 fJ.fd capacitor. Connect this lead to lug 2 of coil D (N8). Leave the other lead free. It will be connected later. / Connect a 1-1/2 wire from lug 6 of tube socket VI (8-1) to lug 1 of variable ca pacitor C (N8). 1500 2.2 MEG PICTORIAL 2 (V) Connect a 1-1/

25、2 wire from lug 1 of var iable capacitor C (8-2) to lug 1 of coil A (8-2). / ) Connect one end of a 2-1/4 wire to lug 2 of coil A (8-1). Leave the other end free. It will be connected later. NOTE: Where a wire passes through a connection and then goes to another point, as in the next step, it will c

26、ount as two wires in the solder instruc tion (8-2), one entering and one leaving the con nection. / (v/) Place one lead of a 2.2 megohm (red-red green) resistor through ground lug A (8-2), through lug 9 (8-2), to the center post (8-1) of tube socket VI. Connect the other leadto lug 7 of VI (N8). ( )

27、 Set the chassis aside temporarily. Pag_e 6 _-1_ 3 TH E PHYSI CAL POSITION OF THESE LUG S 2 .3/4 MA Y A PPEAR DIFFERENT. THEIR PLA CEMENT DE PENDS UPON THE MANUFACTURER . ! USE FULL RE SISTOR LEAD LENGTH PICTORIAL 3 FUNCTION SWITCH WIRI G Refer to Pictorial 3 for the following steps. ( ) Position th

28、e 4-position rotary switch as shown in Pictor ial 3. ( /) Connect a 27 Kn (red-violet-orange) re sistor between lugs 8 (8-1) and 10 (N8) of the switch. (yConnect one end of a 3 wire to lug 10 of the switch (8-2). Leave the other end free. It will be connected later. Connect a 2 WIre etween lugs 11 (

29、N8) and 7 (N8) of the switch. Refer to Detail 3A and prepare a 220 Kn (red-red-yellow) resistor and .005 .dd disc capacitor combination. Do not cut eit .r resistor lead. The soldered capacitor lead should be cut off even with the solder connection, J!ll =faJJi SOL D E R Detail 3A (j Connect the lead

30、 extending from the pr e pared end of the combination to lug 9 of the switch (8-1). Leave the other leads free. They will be connected later . (-0 Connect a 1-1/ 4 wir e between lugs 6 (8-1) and 4 (N8) of the switch. (0 Connect one end of a 2-3/ 4 wire to lug 4 of the switch (8-2). Leave the other e

31、nd free. It will be connected later . ( .;) Connect one end of a 3 wir e to lug 5 of the switch (8-1). Leave the other end free. It will be connected later . Refer to Pictor ial 4 for the following steps. (v Refer to Detail 4A an d install the Function switch at E on the chassis with a control lockw

32、asher and a control nut. Position the lugs as shown in Pictor ial 4. Tighten the nut only enough to hold the switch in place. The nut will have to be removed later . Detail 4A (.) Connect the free end of the wire extending from lug 10 of switch E to lug 2 of coil D (8-3) (AConnect a 510 fJ. fJ.f mic

33、a capacitor from lug 11 of switch E (N8) to lug 7 of tube socket VI (8-2). (.1 Connect the free end of the wire extending from lug 2 of coil A to lug 7 of switch E (N8). Page 7 - - - - - - - - - - - - - - PICTORIAL 4 (Jconnect a .0033 lfd (3300 llf) mica ca pacitor from lug 7 of switch E (8-3) to gr

34、ound lug B on tube socket VI (8-2). (vPlace a 1 length of sleeving on one lead of a 5600 n (green-blue-red) resistor. Connect this lead to lug 3 of switch E (8-1), and connect the other lead to lug 8 of tube socket / (8-1). (/) Connect the free resistor lead of the re sistor-capacitor combination ex

35、tending from lug 9 of switch E to lug 1 of tube socket VI (8-2). (v) Connect the free capacitor lead of this combination to lug 2 of tube socket VI (8-2). Use sleeving on the capacitor lead. / ( .) Connect one end of a 3 wire to ground lug D on tube socket VI (8-1). Leave the other end free. It will

36、 be connected later. ( .) set the chassis aside temporarily. PUSH - ON SPEEDNUT Detail SA Refer to Pictorial 5 for the following steps. ( Position the cabinet base as shown in Pic torial 5. Refer to Detail 5A and install the neon lamp at F. Use a push-on speednut, I ( .) Refer to Detail 5B and mount

37、 the 6-lugter minal strip at L with a 6-32 x 3/8 screw, a #6 lockwasher, a #6 solder lug, and a 6-32 nut. ;ltli!tilfIJlijii(; .t.:,., , Detail 58 - - - Page 8 Y E L DO NOT C U T Detail 5C B L K DO NOT CUT BLK 3-3/4 / ) Cut the power transformer leads to the length shown in Detail 5C. Measur e each l

38、ead from the point where it leaves the transfor mer. (v Remove 1/4 of insulation from the end of each power transfor mer lead. If the wires are not pr esoldered, melt a small amount of solder on each bared lead end to hold the / wire strands together. (.1) Mount the power transformer at K, with the

39、2-lug vertical ter minal strip on the mount ing screw at J. Use 6-32 x 3/ 8 scr ews, #6 lockwashers, and 6-32 nuts as shown in Detail 5D. Position the power transformer so the leads are as shown in Pictorial 5. Detail5D REBENO :;:-.:. CON T RO L : ;Iir . :; :; : :.:.:.;.(.: ,:,:-.:- ,.y(? Detail SE

40、(0 Place a control solder lug on the bushing of a 5000 Q control. Rebend the solder lug so that it touches lug 3 of the contr ol. See Detail 5E. (/) Refer to Detail 5E and mount the 5000 Q control at G with the control solder lug, control flat washer, and a control nut. Position the solder lug and c

41、ontrol lugs as shown in Pictorial 5. C.JMount a 5000 Q control at H with a contr ol lockwasher, control flat washer, and a con trol nut. Position the control lugs as shown. Refer to Detail 5F and mount the phono socket at M with 6-32 x 3/8 screws, #6 lockwashers, and 6- 32 nuts. 6 _ 2 .3/ 8 SCREW De

42、tail SF - Page 9 Refer to Pictorial 6 for the following steps. (l- Connect the short red power transformer lead to solder lug N (NS). (j Connect the short yellow power transformer lead to solder lug N (NS). (v(Connect the short black power transformer lead to lug 6 of terminal strip L (NS). (v(Conne

43、ct the remaining red power trans former lead to lug 3 of terminal strip L (NS). ( 0 Connect a 47 KS1 (yellow-violet-orange) 1 watt resistor from lug 1 of terminal strip L (NS) to solder lug N (NS). Connect a 1000 S1 (brown-black-red) re sistor between lugs 1 (NS) and 2 (NS) of terminal strip L. (.j

44、Refer to Detail 6A and identify the cathode (K) lead of the silicon diode. Connect the cathode (K) lead of the diode to lug 2 (NS) and the other lead to lug 3 (S-2) of ter minal strip L. N OTE: WHEN INSTALLING SILICON DIODES , THE CATHODE END SHOULD BE PLAC ED AS DIRECTED , TH E CATH OD E END IS MAR

45、KED WITH EITHER A C O L OR END, C O L O R DOT. OR COLOR BAND. IN THE ILLUSTRATION , THE SY M B O L K CATHODE END , COLOR COLOR END DOT Detail 6A (;) Position the 20-20 fJ.fd I NOI CATE S THE C O L O R BAN K electr olytic ca pacitor so it does not extend past lug 2 of terminal strip L, as shown in Pi

46、ctorial 6. Place a 1/2 length of sleeving on one positive (+) lead and a 1 length of sleeving on the other positive (+) lead. Connect the (+) lead with 1/2 of sleeving to lug 2 (S-3), and the other (+) lead to lug 1 (NS) of ter minal strip L. / ( oJ) Connect the negative (-) lead of this capac itor

47、to lug 4 of terminal strip L (NS). / (V) Connect either neon lamp lead to solder lug N (S-4). Be sure all four leads are soldered. (j Place a 1-1/2 length of sleeving over the other ne on lamp lead and connect this lead to lug 5 of terminal strip L (NS). ( lace a 3/4 length of sleeving over each lead of a 100 KS1 (brown-black-yellow) resistor. Connect this resistor between lugs 1 (NS) and 5 (S-2) of terminal strip L. (v(Connect a 2-3/4 wire from lug 4