FREDERICK ELECTRONICS lSOOB1500B Instruction Manual Download Page 1

Page: 1 / 71

I
I

l
I

INSTRUCTION MANUAL

MODEL lSOOB RECEIVER

December

1971

FREDERICK ELECTRONICS CORPORATION

Hayward Road, Post Office Box

502

Frederick, Maryland

21701

Printed in U.S.A.

Summary of Contents for lSOOB1500B

Page 1: ...1 I I I I I I I I I l I l I l 1 I l 1 INSTRUCTION MANUAL MODEL lSOOB RECEIVER December 1971 FREDERICK ELECTRONICS CORPORATION Hayward Road Post Office Box 502 Frederick Maryland 21701 Printed in U S A...

Page 2: ...I f I I t l I l l I l Original Printing June 1970 Second Printing April 1971 Third Printing June 1971...

Page 3: ...03 033 C65 03 f f l 3 2000 1200 9002 8998 03 041 01 04 Q7 JI u 0331 I 02 I t l t I l l Figure 7 5 Parts L ist Figures 6 4 and 7 G Added item 59 part number 1MD l 103J capacitor 01 S 0 lOOV Elmenco Add...

Page 4: ...7 5 Figure 7 2 ERRATA SHEET Mode l 1500B cont CORRECTION Added 4 configuration as sho n below Y2 kHz C47 C48 C49 tso CSl C61 C62 C63 C64 C65 8998 3 04 10 o4 10 04 04 03 04 Added item 62 part number MF...

Page 5: ...ducts subjected to improper use tampering negligence or accident and Frederick Electronics Corporation does not authorize any person to assume for it any liability in connection with its products othe...

Page 6: ...3 Mounting 2 1 l 2 4 Rear Panel Connections 2 1 2 4 1 Antenna 2 1 I 2 4 2 Speaker 2 1 2 4 3 Headphones 2 3 2 4 4 Demodulator 2 3 I 2 4 5 Remote AGC 2 3 2 4 6 Remote Local Oscillator Z 3 I III OPERATIO...

Page 7: ...ORY OF OPERATION 4 1 Functional Description 4 2 Circuit Description 4 2 1 Preselector 4 2 2 Mixer Stage 4 2 3 4 2 4 4 2 5 4 2 6 4 2 7 4 2 8 4 2 9 4 2 10 4 2 11 Local Oscillator IF Amplifiers Product D...

Page 8: ...or Adjustment 5 5 IF Alignment 5 6 Mixer Balance Adjustment 5 7 AM AGC Level Adjustment 5 8 OSC Trim Control Adjustment 5 9 Local Oscillator Adjustment SCHEMATIC DIAGRAMS ASSEMBLY DRAWINGS TABLES Spec...

Page 9: ...nal Block Diagram Preselector Schematic Diagram Mixer And Local Oscillator Schematic Diagram IF BFO And Detector Schematic Diagram Audio And AGC Schematic Diagram Power Supply Schematic Diagram Wiring...

Page 10: ...a a n q I a a I t I...

Page 11: ...r circuits a low noise beam deflection mixer and a product detector FSK only to reduce the effects of cross modulation to a level substantially below that of conventional communications receivers Freq...

Page 12: ...E RESPONSE ADJACENT CHANNEL INTERFERENCE THRESHOLD INTERMEDIATE FREQUENCY AUTOMATIC GAIN CONTROL 1 2 N Frequency SSB In MHz Level AM Level 1 7 3 S MHz 0 3 uV 1 S uV 3 S 7 MHZ 0 3 uV l S uV 7 13 MHz 0...

Page 13: ...annel Reception in the 13 5 and 18 0 MHz channels is possible only with special crystals at 22 5 and 27 MHz respectively Reduced sensitivity occurs at several frequencies due to internal spurious outp...

Page 14: ...ill result if the Receiver is connected to 230 volts without this change The Receiver is designed to mount in a standard 19 inch equip ment rack A vertical rack space of 1 3 4 inches is required 2 4 R...

Page 15: ...TROL FUNCTION GROUND EXTERNAL AGC COMt IQN EXTERNAL AGC SPACE INPUT EXTERNAL AGC MARK INPUT GROUND BAL ANCED GOO OUT TO Ill DEMODULATOR IZ j iG SPEAKER OUTPUT UNLISTED PINS NOT USED J21 MIXE R CONTRO...

Page 16: ...l the other output is at pins 10 and 11 of J21 The Model lSOOB is often used with demodulators utilizing a 2550 Hz audio center frequency Since the standard audio out put is 2500 Hz the BFO oscillator...

Page 17: ...on of received signal SSB AM switch SSB position selects a product detector for FSK mode of operation AM position selects an AM detector for AME mode of operation 1 kHz 3 kHz switch 1 kHz aosition sel...

Page 18: ...Model 1550 Synthesizer CRYSTAL sockets Six standard HC6 U crystal sockets that accept any parallel resonant crystal in range of Receiver Each socket has an associated trim capacitor located above the...

Page 19: ...ru E and L Settings of the MHz control are color coded to agree with the band selected In this manner the operator immediately knows the band he has selected and the approximate frequency setting with...

Page 20: ...erator provides a test for Receiver operation since failures including local oscillator failure will result in no noise output when the pushbutton is depressed 3 2 5 RF GAIN CONTROL The RF GAIN contro...

Page 21: ...or AM A 1 7 MHz 3 5 MHz 10 7 12 5 B 3 5 MHZ 7 MHZ 12 5 16 c 7 MHZ 13 MHZ 16 22 excluding 9 MHz IF Channel D 13 MHz 20 MHz 4 11 E 20 MHZ 29 MHZ 11 20 L 10 1Hz 550 kHz 9 010 9 550 i Table 3 3 lists cert...

Page 22: ...Fl Filter Center frequency is the same as the assigned center frequency 2 The A3H center frequency is 1 4 kHz above the carrier frequency 3 For Fl reception Local oscillator crystal Carrier Frequency...

Page 23: ...O 5L0 6BFO 5L0 7BFO 3L0 4BFO LO BFO 4L0 8BFO 3L0 6BFO 2LO 2LO 3LO BFO LO LO 3L0 3BFO 5L0 6BFO 5L0 7BFO 3L0 4BFO 5L0 8BFO LO BFO 4L0 8BFO CARRIER LEVEL uV ADJACENT FREQUENCIES MAXIMUM TYPICAL 0 3 0 3 0...

Page 24: ...signal The overall result is that the output level of the Receiver tends to remain constant regardless of variations in input signal strength The SLOW position of the AGC switch provides a fast attac...

Page 25: ...lected above 3 Set power switch to ON Pilot lamp will light indicating that receiver is operative 4 Rotate RF GAIN control fully clockwise S meter needle will drop to zero 5 6 7 8 9 10 Rotate MONITOR...

Page 26: ...600 ohm line of external De modulator The Demodulator should have some type of level meter to indicate zero dbm When this point is reached the Demodulator s level control can be used to control its g...

Page 27: ...or frequency To facilitate Receiver tuning provision is made at the front panel to accept up to six plug in crystals for any specified frequency within the 10 kllz to 29 MHz range Crystals are selecte...

Page 28: ...RIM CRYSTAL FILTER REMOTE OSCILLAlOR OUT ISMH 3 o k H aw DC Figure 4 1 I I MARK AGC SPACE A GC AM OISAkE o ENAI lf SSB KHz _ INPUT INPUT FROM EXT AN 4L FSK OEMOOULATO t Functional Block Diagram Dl796A...

Page 29: ...nt despite changes in input signal strength The AGC switch permits selection of either an internally generated control voltage with slow or fast release times or an externally generated signal voltage...

Page 30: ...ceiver tuning and relative signal strength The S METER is connected in the AGC de amplifier circuit 4 2 CIRCUIT DESCRIPTION 4 2 1 PRESELECTOR Refer to Figure 6 1 The preselector comprises six switch s...

Page 31: ...s in a manner similar to that of the cathode ray tube Thus the total tube current is varied by the input signal at the control grid and the division of tube current between the plates is varied by the...

Page 32: ...idual crystal frequencies are chosen so that the difference between the received signal frequency and the crystal frequency is always 9000 0 kHz for FSK reception and 9001 4 kHz for AM reception Cryst...

Page 33: ...Both IF amplifiers are controlled by an AGC voltage at pin N The AGC inputs to each amplifier are electrically isolated from each other by RFC choke 15 to prevent RF signal feed over RF is also isola...

Page 34: ...cted output from Z4 is filtered by the low pass filter to produce an audio de output to the bandwidth selector circuit of the AGC amplifier The AGC amplifier consists of operational amplifier ZS The a...

Page 35: ...audio monitor amplifier consists of driver stage Qll and push pull power amplifier stage Ql 2 Ql3 This circuit pro vides an audio power output of approximately 1 4 watt into an external 1 6 ohm speake...

Page 36: ...e for receiving FSK signals since a slow release time introduces the proper amount of delay to suppress noise during momentary signal fadeouts The slow release circuit in the Receiver consists of capa...

Page 37: ...M mode it is required that the operator place the AGC switch in remote and remove all external inputs 4 2 11 POWER SUPPLY Refer to Figure 6 5 The power supply consists of a 12 vdc full wave rectifier...

Page 38: ...t 3 Mixer Balance Adjustment 4 AM AGC Level Adjustment Each procedure can be performed independently when a component which affects only one circuit is replaced For example if either mixer tube is rep...

Page 39: ...r outputs should be checked whenever it is necessary to replace faulty components in one of the oscillator circuits Only the circuit actually affected by the replacement must be checked but it is reco...

Page 40: ...quency crystal in sock et 1 and set CRYSTAL switch to position 1 2 Connect Voltmeter leads across DEMOD terminal of rear panel terminal strip Set BAND switch to proper po sition and tune Receiver for...

Page 41: ...nerator lead from ANT connector and connect to OSC IN connector r HIGH VOLTAGE is carried on ex posed track adjacent to Rl Use extreme caution while ad justing Rl high voltage can result in death on c...

Page 42: ...ould be performed before the initial local oscillator adjust ment described in paragraph 5 9 The following symbols are used in the adjustment procedure fc nominal marked crystal frequency 8f number of...

Page 43: ...al 5 6 1 Insert operating crystals in desired crystal position Connect Counter to rear panel OSC OUT connector Con nect oscilloscope to J 2 on N0848 with a high impedance 1 meg 7 Pf probe 2 Set CRYSTA...

Page 44: ...t 4 z 0 t 4 u U...

Page 45: ...5 s u q 3 U I l 9 1 L 0 1 81 1 1 1 8Url C3 JOOPF 11 S 4 c I LJ R J ill 470 12 I II r I D Cf4 t60PF I __ __ _ J6 l SI E c IF TO 8FO I L CIRCVITS 0 I o n I I C 1 os I I r cJ6 Z I I c 0 I e I ot I I I 08...

Page 46: ...AFTER ERI 1 0 fE 557 Joo 7 1 Rtf Y D Z 14S C9 T o1 9 r v t 1 ttSOV I R IZI K IT JIS I LOCAL osc IN llP c S Ro l 1J2 f P C11 504RD tr 1 0SC OUT TO R J4 IY6 _ _ _j o U I 5 0 4 HOH o 3 HOH c E ll z f f e...

Page 47: ...JFSI 5A Aro e e 4 c 65 T 4 L 14 Q J CL Ii M J L h i I ti Nz I SSIJ p I AM TP4 ABLE oF AUDIO 6tTE AND 8FO VAlue c dc B C lf C5o C S s N 1r a I f 1 1 0 nt z C4J NPo C l s soPF CR6 p li AM sse R 1 IOOfl...

Page 48: ...AI P NtJ7 J S P C JbAAO II SX J 6T SOOPF 13 j_ CIO 500Pf Figure 6 4 Audio IS TY1 tc rnlz JZI 91TBI Z GNO ll Z 00 Ill e SPEAI ER Till Cl MONITOR JKK ON FRONT P NEL 3JTHX fJZHO T I 31 4 y l 1 bt G _ DEM...

Page 49: ...fLd FOI i JOV RA 7 CaN N ECr REO r BNK LEA O S IN SERlE USE RJR ISOO J ONL I 1 L I aLn litO Figure 6 5 1 4 IT J L MIKEl 811LAHt lao s2 It ll 4W 1 1 tldLTA t EJ lf l C4 1001 f ________ K f tsoJ J 4 0 1...

Page 50: ...w 53 I I I I I I IJ4 j Sl 1 108 18 V0795 il OOTTriJ COIVNECTOI f S SNOW IPC TION OT f O IA JO A lStT ON IVG or ell o v A 079S Btl 14 1 1 tllti IS 7Nlf SAME e D D J i 1 1 s I I j1 I 11Jt6 1 Jl l Jl f 7...

Page 51: ...U z 1 f s 1 f Q 1 f E 4 z z 0 1 f t Ll E 4 u u t Ll U 0 t Ll E 0...

Page 52: ...Oi STENCIL t itt 1 Cl fOQ t ONLY IV R V 1 P 11M R T 1 oc c 7l I OOC Ot 1 ofE ITEM NC Yl861 _ cC FOii f L J CL fPACE 0 VE i SITY API i C TION i ITt ONE SET OF ANNE Cli f 57 9 S 1r 16 CNo84t w FOR 4tt a...

Page 53: ...2 J J a J so s i S 43 3 0 2 I S 42 I JA Z 4 5 12 f 3o 40 I 7 3 I MOO i I 60 J i 57 I 750 I 34 004 fS I 327 j f I I 1 2 8 30 _11 33 I MST ISD Je 1 K7Zo3 N 31 1 IZ A 30 I Mln S Z I 4 Jt Y 2B 13 1rL Z1...

Page 54: ...f O j 11 l L l ll l I IS L4 Jl L P 1 1 L 4 l L I c 3 31 ivi Jv 66 7 JNC 1 U S A 15Cd A CHE 5 N 15008 II I 3 Qf 41 I ij 4 6 V 8 _ _ Q g_ h d 1 1 1 1 1 INOt CTORS RE TO liE 5T 4CKcO AS SkO vH 4801 eo 0...

Page 55: ...SOCKE T 4CJCiAT J l J4 s JS Io J1f IPI SECTI Iv h Oo S o TI rT TYPt _JSR 3ZS JL I JSII JU JH 5 l rrOETt IV T ss Y 6 ITT 36 OMIS 4 C 4A11C TtJii1470PF SA VJ ARCO 35 OMIS fOI J JOOP N I OIW 5 i J lJOP l...

Page 56: ...ECTIOA 1JN SJ IQPT A 1 1 TT rrcc JS 315 3 I S J Z J J S AFr crrr v T c ITT o t 36 OMI 47 C4A C T _ J 470PF 5i V r 4RCO 35 z tJo s J OI JOCPF I N I 011 riS T Z70PF 3 5 011115 i OIV OO F 3 OA4 5 t61 160...

Page 57: ...i18 1Z I OIA DRILL 9f 140 CIA DRILL SS 051 OIA CRILL 2 l Uc CIA OR lLL 70 C7 QIA 11 ON 1 00 B USE MODEL 0 3 0 ITEM16 ON 1500C USE MODEL 0 z t ITEMoo II RH C EW TIC 01 61 A ill TABLE A o D l_ l I 1 I...

Page 58: ...clNCf I 2 73 0 TUBE RC A 18 I C IH2 2 cOlL ASSY FEC 11 I c 21 51 COIL ASSY ec 16 I 10DEU 0 3 0G CRYSTAl FILTEI CFNE J 15 I HT IOKA Z l TRit t CAi CliOR A Pf QEX 14 5 SHK 510 CAPACITOR 01 MFD I KV SPR...

Page 59: ...5 063 0R 1 01 9 64 140 OR C 11 55 05 JO SOI OEI 4BJC AIO ST41 00r EM4LF J9AIS 3 00 AIOT Pt T 8o4 0 A W 4T AJST tlll mP r 6 ETYIFEA SW TC r f 4C K 5 SO FM4 J r r Oi88i 5 0 OI SC lPl ON Figure 7 4 Local...

Page 60: ...PIN Y 5 f Oo JJ LJI I PL4CES ill v 38 01 01 PLACES IOJ0 4 4 Pt 1CES 156 014 PLACES J CLEAN 804 0S lEFOR STAL RT ON Or TEM 7 Figure 7 5 v J 8 N0 y y C41 48 C4 1 CS O I__ Chi FRtfCJ w nrH 5fAKOIIf O 250...

Page 61: ...1 AT 4 h IRc N P Z S 4 SOLID ST i KE PI V cW i L J VVT N 56 16AF V4SL ER f Z SPLIT DC SCREV VP 6 _ 3 tbBdll FVcLET T RAAISIS R TR i 1S c q R i N SF R lcR POTFA T C f TEl s s TOR O Jk l 4i J J 1 I JK 5...

Page 62: ...SPEC FicO DRILL l tL MTG IICXES 6o o4o 3 A NO 3z DR IS Z Pt AcES 4 8 NO DR lot 6 PLACE S E T 4 d F erftJW 21i CCWPONFNT i 4 UC fiN Ten 1 I 7 s 4 32 Figure 7 6 13 C j Blt tz If R31 W ilQJR32 D C N en I...

Page 63: ...8 rltR GA SoL D IlLPHA WASJIE i N0 2 S 1rLocJ PNcs 8 4Z Sc t W z 1 V4 L4 1 10 1 lt TY S SX TRANS Oii HER n IAO TY IS X I f T 3 x L T 34 J TR i V Fo ij te r AD FO 100 JioOE F 4 J l NI D ZN390s rl I N 5...

Page 64: ...ot i 1 D I C o Ni P e Ty S5 X TR MSFOR HER 71 ALI I TY 45X 4 3 x I I T 34 X TR q J JFOR ItEI lAD 2 o too loDE t n CONILD z 2N390f f 4NSIS7 JK o J e 0 2N39o3 t Mor 2 2NG Tl 4 2N404 TR NS STOR t I 50l 3...

Page 65: ...tor for on off keying of a continuous wave CW carrier by the modulating signal without the use of any other modulation Fl Modulation designator for Frequency Shift Keying FSK where the frequency of a...

Page 66: ...fx 1500B Bandwidth 1 kHz Mode SSB Al Bands A thru C and L fx f l500B 9 0MHz fc 9 0MHz Bands D and E fx f l500B 9 0MHz fc 9 0MHz A 4 FSK OPERA TION The frequency shift 850Hz audio center frequency 25 5...

Page 67: ...Bands A thru C and L fx f l500B 9 0 MHz fc 9 0 MHz Bands b and E fx f l500B 9 0 MHz fc 9 0 MHz A 4 2 METHOD 2 Exciter In USB Mode A7J M S 1 850Hz 2550Hz fc 1kHz Filter Envelope 850Hz 2550Hz I fc f l50...

Page 68: ...MttJI 9 TR4 SFOI UEP 5 1 11 IS I 61 6 SJ IiO OPOT C N IRr li i A 1 5311 OIOOE i E vor IJ 4 N 4004 01 JOE UOT I 4 1 1 400 OIOOE ITT II I 845X5VOI04Z t APA C TO f ILl IM v C IE 1 10 J 9DJM63c 5 tl CAPAC...

Page 69: ...T5 4 161 1 HotE f OIV ER ITEM 5 WtTh hbtES 6 Pc w e o 6 Erae E a RING C RY5TR SCK E S TO 8cw eo w IRE 1 fftW PER ioWRIN 6 Ch T 5 X EM D c Rc Olo71 6 L o A or Ct E 4 V f b o 4RL7 f rr 4v rr E MOVr s cV...

Page 70: ...ds A thru C and L fx f 1500B 9 0 MHz fc 9 0 MHz Bands D and E fx f l500B 9 0 MHz fc 9 0 MHz A 4 2 METHOD 2 M S Exciter Js In USB 8 5 O H z Mode A7J 2550Hz fc 1kHz F ilter Envelope 850Hz 2550Hz I fc 15...

Page 71: ...ENCY OF CRYSTAL fx Bands A thru C and L fx f lSOOB 9 0 MHz fc 2550 Hz 9 0 MHz Bands D and E fx f lSOOB 9 0 MHz fc 2550 Hz 9 0 MHz A S AME OPERATION SELCALL Exciter In AME Mode A3H 3kHz I lSOOB Filter...

Search results

Summary of Contents for lSOOB1500B

Reviews:

Related manuals for lSOOB1500B

Brands by name

Popular brands

FREDERICK ELECTRONICS lSOOB1500B, Instruction Manual

Search results

Summary of Contents for lSOOB1500B

Reviews:

Related manuals for lSOOB1500B

Brands by name

Popular brands