Harris CRITERION 90-1, Technical Manual

Page 1: ...www SteamPoweredRadio Com TECHNICAL MANUAL HARRIS...

Page 2: ...www SteamPoweredRadio Com m T M No 888 1729 001 Price 6 00 TECHNICAL MANUAL CRITERION 90 1 AND 90 2 RECORD PLAYBACK UNITS HARRIS CORPORATION Broadcast Products Division Printed July 1977...

Page 3: ...st of Effective Pages Original iii through vii Original 1 0 through 1 4 Original 2 1 through 2 6 Original 3 1 through 3 7 Original 3 8 Blank 4 1 through 4 3 Original 4 4 Blank 5 1 through 5 25 Origina...

Page 4: ...taken to avoid electrical shock in all circuits where substantial currents or voltages may be pr e sent either through design or short circuit Caution should also be ob served in lif ting and hoistin...

Page 5: ...III OPERATION 2 1 2 1 2 1 2 1 2 2 2 2 2 2 2 2 2 2 2 5 2 5 2 5 General 3 1 Controls and Indicators 3 1 Playback Operating Procedure 3 6 Record Operating Procedure 3 6 SECTION IV THEORY OF OPERATION Pl...

Page 6: ...sor Adjustment 5 9 Record Program Amplifier Alignment 5 20 Playback Program Amplifier Adjustments 5 20 Cue Frequency and Record Level Adjustments 5 21 Operating Voltages 5 22 SECTION VI PARTS LIST 6 1...

Page 7: ...Program Amplifier Adjustments Figure 5 10 5 4 Bias Oscillator Adj ustments Figure 5 11 5 5 Three Tone Oscillator Adjustments Figure 5 12 6 1 Replaceable Parts List Index 6 2 Criterion 90 1 and 90 2 P...

Page 8: ...Criterion 90 1 and 90 2 Tape Deck Dimensions 5 2 Head Guide Height Gauge 5 4 Head Adjustments 5 4 Head Assembly Tape Guide 5 4 Stereo Phasing Patterns 5 6 Pinch Roller Adjustment Gauge Larger Portion...

Page 9: ...o Com f I M CRITERION 90 1 I CRITERION 90 2 RECORD PLAYBACK f il J t JI CRITERION 90 2 PLAYBACK Figure 1 1 Criterion 90 1 and 90 2 Record Playback Units 1 0 WARNING Disconnect primary power prior to s...

Page 10: ...NAB CARTRIDGE SIZE Criterion 90 1 Mono 994 7993 001 A or B Playback Criterion 90 1 Ster eo 994 7994 001 A or B Playback Criterion 90 2 Mono 994 7995 001 A B or C Playback Criterion 90 2 Stereo 994 799...

Page 11: ...es together with the playback and record heads assures the optimum in tape path guidance The playback only model has a dummy head installed in the left head slot 1 6 EQUIPMENT CHARACTERISTICS 1 7 Tabl...

Page 12: ...o ducing Standards CCIR equalization available on special order 18 dBm clipping point normally O dBm with standard NAB level recording 600 ohm balanced impedance with 150 ohm operation 1000 Hz Primary...

Page 13: ...STIC 7 inches 17 78 cm 19 inches 48 26 cm 15 inches 38 1 cm 5 1 2 inches 13 97 cm Criterion 90 1 8 5 8 inches 21 91 cm Criterion 90 2 17 1 8 inches 43 82 cm Criterion 90 2 Playback Only Model 10 1 4 i...

Page 14: ...iners are to be opened from the top and the equipment carefully removed The control tags attach ed to the equipment are to be checked against the Packing Check List to veri fy that the shipment is com...

Page 15: ...d audio console input terminals and the 600 ohm program output terminals 3 and 5 of playback connector J2 figure 2 1 The shield of the cable should be con nec t ed to terminal 1 2 15 STEREOPHONIC PLAY...

Page 16: ...eredRadio Com CRITERION 90 2 RECORD PLAYBACK PO M our J2 I I CRITERION 90 2 PLAYBACK CRITERION 90 1 0 Figure 2 1 Cri terion 90 Rear Panel Connections WARNING Disconnect primary power prior to servicin...

Page 17: ...www SteamPoweredRadio Com 2 4 R24 TIO R25 la 0 00000 G E 00 000 Figure 2 2 Input Output Transformer Connections WARNING Disconnect primary power prior to servicing 1729 3 N D...

Page 18: ...nnected to terminal 1 For stereo operation connect the right channel audio to terminals 4 and 6 of J4 and the shield to terminal 1 The connec tions are listed in table 2 2 2 21 RECORD AMPLIFIER INPUT...

Page 19: ...Record External Connections FUNCTION 1 kHz Cue Inhibit 1 kHz Cue Add Ground Remote 150 Hz Cue Keying Not Used Remote 8 kHz Cue Keying Not Used Remote Record SET Not Used Remote SET Indication Shield...

Page 20: ...ack and record units The section also contains information on play back and record operating procedures 3 3 CONTROLS AND INDICATORS 3 4 The cont rols for Criterion 90 playback units are shown in figur...

Page 21: ...www SteamPoweredRadio Com 1729 4 Figure 3 1 Playback Controls and Indicators Common to all Units 3 2 WARNING Disconnect primary power prior to servicing J N...

Page 22: ...tion The lamp also lights when the Tertiary cue relay is activated Pushbutton indicator switch when de pressed activates the run relay Kl the pinch roller solenoid sets the tape in motion and deenergi...

Page 23: ...www SteamPoweredRadio Com 1729 5 Figure 3 2 Record Controls and Indicators 3 4 WARNING Disconnect primary power prior to servicing I N 0...

Page 24: ...mode Indicates recording and playback level of the left record channel Adjusts the recording level of the left control channel Indicates recording and playback level of the right record channel Adjust...

Page 25: ...STOP indicator lights indicating the cartridge is properly inserted Depress the START switch on the playback unit pre run the cartridge for several seconds and press the stop switch This will ensure p...

Page 26: ...esired the secondary and tertiary cue tones may be inserted after the message has been completely recorded This feature permits monitor ing and accurate placement of the tones The machine does not hav...

Page 27: ...pplied to the LDR s and their resistance drops to near zero 4 5 CUE SENSOR CARD 4 6 The output of the playback head is equalized through amplifier Ul and applied to a buffer amplifier formed by a seco...

Page 28: ...librator first then the RECORD LEVEL calibrat or Therefore any change in the RECORD LEVEL calibrator will also change the playback calibration 4 11 BIAS OSCILLATOR 4 12 Transistors Ql and Q2 operate a...

Page 29: ...ON position ac power is applied directly to the drive motor to the solenoid rectifier CRl and to power transformer Tl The main power supply develops a regulated by Ul 24 volts When a cartridge is pro...

Page 30: ...nch roller cross shaft with Gulfway 52 lubricant Alternately lay the unit on each side and apply one drop of oil to each end of the cross shaft at the lower side of the opening Allow the oil to run do...

Page 31: ...ING r n 10 IIH IIIU II li OY 0 G 9 17 0 6111 IARGU S ll lN C 11ovr 0 I 6d IIIHIIIIU II HHCl C ARlS W I1H lt5 l TA PE HflOS II lAP GUIDE CfMTER POSl H RIGHI HPf GUIO P PI N CH ROLLER SHlfl 0 IIOIOR C...

Page 32: ...n the oxide use in a well ventilated area so that it may be wiped off the trans parent mylar base Position the mylar tape across the head faces and pro perly engage it in the tape guides figure 5 5 Th...

Page 33: ...00 244 001 t_ a 255 oo i f 315 t 001 309 _ 001 1l 181 lo Figure 5 3 Head Guide Height Gauge LO CK SCREW 8 HEIGHT AZIM UTH C I I HEAD Figure 5 4 Head Adjustment Figure 5 5 Head Assembly Tape Guide 5 4...

Page 34: ...ak Adjust the head for the ma jor peak only c Tighten the lock screw for this head STEREO PHASE PLAYBACK ADJUSTMENT a Set the left and right channels for equal outputs using a level set tape b Connect...

Page 35: ...www SteamPoweredRadio Com 5 6 A RIGHT CHANNEL B LEFT CHANNEL C BOTH CHANNELS 0 PHASE SHIFT 1729 11 Figure 5 6 Stereo Phasing Patterns WARNING Disconnect primary power prior to servicing...

Page 36: ...tape machines is not adjustable During manufacture the motor is accurately positioned by means of extremely accurate machining of the deck plate 5 21 SOLENOID ADJUSTMENT Do not energize the solenoid...

Page 37: ...efer to paragraph 5 24 d If the pinch roller should fail to return to its rest posi tion the probable cause is a weak spring The spring should be replaced Unnecessary removal of solenoid plunger from...

Page 38: ...d U2 9 c Start unit and adjust potentiometer Rl8 for peak reading on VTVM d Adjust RlO as required for the tape deck to just cue off e Insert a 15O Hz threshold cartridge recorded 7 d from operating l...

Page 39: ...IN R20 0 0 RIG HT CHANNEL GAIN R40 NOTE COMPONENTS ON RIGHT HALF OF BOARD NOT PRESENT ON MONO PLAYBACK AMPLIFIER RIGHT CHANNEL EQUALIZATION R2 1729 6 Figure 5 8 Stereo Program Amplifier Adjustment Loc...

Page 40: ...TION High Freq R9 Left channel high frequency equaliza tion adjust for flat response Level R2O Left channel gain control Level R4O Right channel gain control High Freq R29 Right channel high frequency...

Page 41: ...ADJ RlO 5 12 15U HZ THRESHOLD ADJ R42 8 KHZ THRESHOLD ADJ P 9 8 KHZ CENTER FREQ R36 150 HZ CENTER FREQ RSl Figure 5 9 Cue Sensor Adjustment Locations WARNING Disconnect primary power prior to servici...

Page 42: ...Tape adjust so that unit shuts off While operat ing with Threshold Tape adjust to brighten START indicator While operating with Threshold Tape adjust to illuminate READY indicator Adjusts center frequ...

Page 43: ...P B METER CAL LEFT RECORD METER CAL R2 LEFT P B METER CAL R8 RIGHT RECORD METER CAL Rl8 HIGH FREQUENCY BOOST RIGHT CHANNEL 12 RIGHT P B METER CAL R24 Figure 5 10 Record Program Amplifier Adjustment Lo...

Page 44: ...FUNCTION Adjust left channel for a flat responsE at 15 kHz Adjust zero reference of left record channel wit h desired input Adjust zero reference of right record channel with desired input Adjust rig...

Page 45: ...eredRadio Com CUE BIAS LEVEL Cl4 LEFT BIAS LEVEL Cl5 RIGHT BIAS TRAP L2 BIAS Cl6 LEFT BIAS TRAP Ll Figure 5 11 Bias Oscillator Adjustment Locations 5 16 WARNING Disconnect primary power prior to servi...

Page 46: ...or 1 dB overbias at 1 kHz monitoring playback amplifier Adjust for 1 dB overbias at 1 kHz monitoring playback amplifier Adjust for minimum bias at recording amplifier Cl4 Adjust for minimum bias at re...

Page 47: ...KHZ FREQ L2 150 HZ LEVEL Rl4 150 HZ CENTER FREQ ADJ Rl7 150 HZ FREQ Ll 8 KHZ LEVEL Rll 8 KHZ CENTER FREQ ADJ 110 BIAS TRAP COIL L4 8 KHZ FREQ L3 1729 10 Figure 5 12 Three Tone Oscillator Adjustment L...

Page 48: ...r equency of 1 kHz Sets the 1 kHz oscillator output level Sets the 150 Hz oscillat or output level Adjust filter to center frequency of 150 Hz Sets the 8 kHz oscillator output level Adjust filter to c...

Page 49: ...st Ll L2 on recordi ng amplifier as required t o obtain 10 dB output level f Turn RECORD LEVEL contr ol complet ely off Connect an os cilloscope or high impedance ac voltmeter to the negative end of C...

Page 50: ...E To preclude head and tape saturation the high frequency is normally recorded 10 dB low with reference to the 1 kHz test tone e With the VTVM connected to the right channel output depress the START p...

Page 51: ...r to operate continuously and jumper the cue head out put into the left program amplifier i SET and STA RT the recorder Adjust Cl4 on the bias card for maximum output on the program channel j On the t...

Page 52: ...4 0V 11 0V 0 Integrated Circuit Ul and U2 1 in No 1 2 3 6 8 11 12 13 4 5 9 10 7 14 Pin No 1 2 5 8 11 12 13 3 14 4 9 10 6 7 Voltage Approx 0 5 Vdc 12 0 Vdc 0 0 Vdc 24 0 Vdc Integrated Circuit U3 Voltag...

Page 53: ...pin 14 is ap proximately 0 6V p p with Ml and M2 set to Oat 700 Hz d Bias Oscillator 992 4582 001 Transistor Emitter Base Collector Ql Q2 Q3 Q4 Q5 Q6 Q7 2 65V 2 4V 23 lV 2 65V 2 4V 23 lV 3 10V 2 6V 3...

Page 54: ...p 1 1 Vdc 0 6V p p 0 8 Vdc 1 4V p p 1 1 Vdc 0 9V p p 3 0 Vdc 3 6 Vdc 18V pulse on start Integr ated Circuit Ul Pin No 1 2 3 6 8 11 12 13 4 5 9 10 7 14 Voltage 0 6 12 0 o o 24 0 9 8 Vdc 9 0 Vdc 9 0 Vd...

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Page 56: ...very case however a substitute part is selected for conformance to overall design specifications so that equipment perfor mance is not affected REPLACEABLE PARTS SERVICE 6 4 Replacement parts are avai...

Page 57: ...gram Amplifier 994 6801 001 6 4 Stereo Program Amplifier 994 6802 001 6 5 Cue Sensor Board 994 7884 001 6 6 Record Program Amplifier 994 6899 001 6 7 Bias Oscillator Module 992 4582 001 6 8 Tone Oscil...

Page 58: ...50V Cl2 thru C15 516 0375 000 Capacitor 0 01 uF 50V CRl 384 0319 000 Bridge Rectifier CR2 CR3 384 0352 000 Diode 1N4246 CR5 384 0353 000 Diode 1N4247 CR6 thru CR8 384 0352 000 Diode 1N4246 Jl 612 0466...

Page 59: ...ohm l 2W 5 R7 540 0032 000 Resistor 200 ohm l 2W 5 R8 540 0023 000 Resistor 82 ohm l 2W 5 R9 542 1141 000 Resistor 10k ohm 3 l 4W 5 Rl0 Rll 540 0043 000 Resistor 560 ohm l 2W 5 Sl 604 0472 000 Microsw...

Page 60: ...816 8181 001 358 1626 000 994 6886 002 916 3579 002 335 0024 000 456 0033 000 DESCRIPTION REFER TO FIGURE 6 1 Deck Plate Deck Plate Cartridge Guide Cartridge Pad Head Support Head Clamp Spring Tape Gu...

Page 61: ...www SteamPoweredRadio Com 19 Figure 6 1 Criterion 90 1 and 90 2 Exploded View 839 3439 001 6 6 WARNING Disconnect primary power prior to servicing...

Page 62: ...0 550 0338 000 506 0005 000 396 0229 000 396 0229 0 0 632 0699 000 632 0699 000 540 0886 000 DESCRIPTION Solenoid Nylon Washer Solenoid Plunger Part of Solenoid Drive Chain Assembly Drive Cover Sl Dec...

Page 63: ...37 000 598 0339 000 398 0053 000 398 0049 000 402 0023 000 522 0242 000 384 0352 000 384 0353 000 612 0464 000 612 0461 000 612 0508 000 Switch Swicch3 DESCRIPTION Switch Power Indicator Red Lens Oran...

Page 64: ...tor 1 540 0034 000 Resistor 240 ohm 1 2W 5 1 540 0025 000 Resistor 100 ohm 1 2W 5 1 540 0032 000 Resist or 200 ohm l 2W 5 2 540 1111 000 Resistor 10k ohm l 2W 5 2 540 1111 000 Resistor 10k ohm l 2W 5...

Page 65: ...l 522 0244 000 Capacitor 50 uF 25V Cl2 500 0908 000 Capacitor 470 pF 500V C25 500 0761 000 Capacitor 150 pF 500V Ql thru Q4 380 0115 000 Transistor 2N5088 QS 380 0050 000 Transistor RCA 40317 Q6 380 0...

Page 66: ...l 2W 5 1 R12 540 0027 000 Resistor 120 ohm l 2W 5 1 Rl3 540 0058 000 Resistor 2 4k ohm 1 2W 5 1 R14 540 0071 000 Resistor 8 2k ohm l 2W 5 1 Rl5 540 0052 000 Resistor 1 3k ohm l 2W 5 1 R16 540 0025 000...

Page 67: ...pacitor 0 002 uF l kV Cll 522 0244 000 Capacitor 50 uF 25V Cl2 500 0908 000 Capacitor 470 pF 500V Cl3 522 0232 000 Capacit or 1 uF 25V Cl4 522 0208 000 Capacitor 50 uF 12V Cl5 508 0210 000 Capacitor 0...

Page 68: ...esistor 1 8k ohm l 2W 5 1 R3 540 0097 000 Resistor 100k ohm l 2W 5 l R4 540 0032 000 Resistor 200 ohm l 2W 5 1 R5 540 0057 000 Resistor 2 2k ohm 1 2W 5 1 R6 540 0045 000 Resist or 680 ohm 1 2W 5 1 R7...

Page 69: ...Resistor 2 2k ohm 1 2W 5 R26 540 0045 000 Resistor 680 ohm l 2W 5 R27 540 0081 000 Resistor 22k ohm l 2W 5 R28 540 0057 000 Resistor 2 2k ohm l 2W 5 R29 550 0272 000 Potentiometer 10k ohm l 4W R30 54...

Page 70: ...tereo Program Amplifier Module 994 6802 001 Continued REF SYMBOL HARRIS PART NO DESCRIPTION QTY R39 540 0013 000 Resistor 33 ohm l 2W 5 1 R40 550 0272 000 Potentiometer 10k ohm 1 4W 1 6 15 WARNING Dis...

Page 71: ...ClO 508 0279 000 Capacitor 0 033 uF Mylar Cll 508 0215 000 Capacitor 0 01 uF Mylar Cl2 500 0759 000 Capacitor 100 pF Mica Cl3 500 0808 000 Capacitor 20 pF Mica Cl4 516 0375 000 Capacitor 0 01 uF Disc...

Page 72: ...2 uF 35V C34 500 0210 000 Capacitor 0 015 uF Mylar C35 500 0759 000 Capacitor 100 pF Mica C36 500 0827 000 Capacitor 130 pF Mica C37 516 0375 000 Capacitor 0 01 uF Disc C38 526 0093 000 Capacitor 15...

Page 73: ...0 1320 000 Resistor 5 1 Megohm l 2W 5 R3 R4 540 1162 000 Resistor l Megohm l 2W 5 RS 540 1319 000 Resistor 510k ohm l 2W 5 R6 540 1147 000 Resistor 27k ohm l 2W 5 R7 540 1173 000 Resistor 2 Megohm 1 2...

Page 74: ...540 1111 000 Resistor 10k ohm l 2W 5 1 R25 540 1210 000 Resistor 150k ohm l 2W 5 1 R26 R27 548 1133 000 Resistor 13k ohm l 4W 5 2 R28 540 1137 000 Resistor 3 9k ohm l 2W 5 1 R29 550 0711 000 Potentiom...

Page 75: ...27k ohm l 2W 5 R48 540 1198 000 Resistor 470k ohm l 2W 5 R49 540 1142 000 Resistor 240k ohm l 2W 5 R50 540 1129 000 Resistor 1 5k ohm l 2W 5 RSl 550 0865 000 Potentiometer lk ohm l 2W R52 540 1182 00...

Page 76: ...sistor 10k ohm l 2W 5 R63 540 1212 000 Resistor 220k ohm l 2W 5 Ul U2 382 0212 000 Integrated Circuit LM3900 U3 382 0461 000 Integrated Circuit LM3302N XQ2 404 0198 000 Transipad XQ4 404 0198 000 Tran...

Page 77: ...itor 35 uF 6V Cl0 522 0246 000 Capacitor 100 uF 25V Cll 522 0236 000 Capacitor 5 uF 25V Cl2 522 0180 000 Capacitor 35 uF 6V Cl3 Cl4 522 0236 000 Capacitor 5 uF 25V Cl5 500 0817 000 Capacitor 47 pF soo...

Page 78: ...50 0392 000 Potentiometer Tr immer 100k ohm 1 R9 540 0898 000 Resistor 270 ohm l 4W 5 1 RlO 540 0912 000 Resistor lk ohm l 4W 5 l Rll 540 0939 000 Resi stor 13k ohm l 4W 5 1 Rl2 Rl3 540 0908 000 Resi...

Page 79: ...SYMBOL HARRIS PART NO DESCRIPTION R24 550 0392 000 Potentiometer Tr immer 100k ohm R25 R26 540 0881 000 Resistor 51 ohm l 4W 5 Ul 382 0120 000 Integr ated Cir cuit CA3052 XUl 404 0306 000 Socket Integ...

Page 80: ...522 0511 000 Capacitor 300 uF 25V 508 0215 000 Capacitor 0 01 uF lOOV 522 0511 000 Capacitor 300 uF 25V 508 0215 000 500 0817 000 508 0215 000 500 1200 000 526 0333 000 500 0830 000 526 0057 000 384 0...

Page 81: ...40 0928 000 Resistor 4 7k ohm l 4W 5 R9 540 0945 000 Resistor 24k ohm 1 4W 5 RlO 540 0936 000 Resistor 10k ohm 1 4W 5 Rll 540 0945 000 Resistor 24k ohm l 4W 5 Rl2 Rl3 540 0936 000 Resistor 10k ohm l 4...

Page 82: ...pacitor 1 uF 35V Tant 508 0532 000 Capacitor 0 05 uF Poloystyrene 500 0759 000 Capacitor 100 pF 526 0316 000 526 0050 000 526 0049 000 500 0784 000 500 0759 000 526 0050 000 526 0109 000 526 0050 000...

Page 83: ...386 0081 000 Diode Zener 3 6V 492 0369 000 492 0368 000 492 0367 000 492 0363 000 380 0111 000 380 0143 000 380 0111 000 540 1114 000 540 1160 000 540 1179 000 540 1180 000 540 1111 000 540 1202 000...

Page 84: ...138 000 Resistor 3k ohm l 2W 5 1 Rl7 550 0865 000 Potentiometer lk ohm Variable l R18 540 1251 000 Resistor 300k ohm 1 2W 5 1 Rl9 540 1108 000 Resistor 36k ohm 1 2W 5 1 R20 540 1111 000 Resistor 10k o...

Page 85: ...2W 5 R40 540 1111 000 Resistor 10k ohm 1 2W 5 R41 540 1180 000 Resistor 360 ohm l 2W 5 R42 540 1179 000 Resistor 3 6k ohm l 2W 5 R43 540 1160 000 Resistor 22k ohm l 2W 5 R44 540 1102 000 Resistor 100...

Page 86: ...428 001 Criterion 90 2 Play 939 1962 001 Criterion 90 2 Rec Play 424 0100 000 Rubber Feet Gray 610 0482 000 Plug 6 Pin latching mates with J2 Playback J4 Record Amp 610 0516 000 Plug 18 Pin latching m...

Page 87: ...tic diagrams necessary for maintain ing the Criterion 90 1 and 90 2 Record Playback Units The following dia grams are contained in this section Figure 7 1 7 2 Title Criterion 90 1 and 90 2 Playback Cr...

Page 88: ...eredRadio Com r I 1 II I I I L r I I I I I I I I I J l CQICA T 1 Otll ltflf _ flat L l Q h tlOU LO 1 11 Q lll1111 J I re 1 d t t lll l I I I i 1 Ii D 7 I I I FIGURE 7 N 6T RION 90 1 PLAYBACK 852 8088...

Page 89: ...t uc o i n CC 1 1 ti l f JIil MN u t 1 u 1 I L L Ill 11 I 1 le l _ _ _ _ 11 I Ht ril ii il c i C 11 4 i 10 IJft j U D o n m lli JUt ttr I l r 9 _ _ _ _J LL _ I 1 1 1 1 __ _ 1 r T 7 7 7 _ i 1 _ J Ii t...

Page 90: ...o LEFT l 2 db RIGHT 6 2 d RIGHT o o RIGHT 1 14 0Jh INPUT 1 K H Z 160N W M FR EQU E N C YRESPONSE R E 15K F LEFT CH 1 RIGHT CH 0 PHASING iT 1 KHZ CUE SEN SOR i f 7D8 THRESH OLD REC ORD FUNCTIONS 12K 0...

Page 91: ...playback machines provide up to 105 ma 24V for external lamps and or relays with a minimum 117V 10 lOSV AC line up to 170 ma with a llOV AC line Typical 28V 40 ma lamps draw 32 ma 24V permitting up to...

Page 92: ...www SteamPoweredRadio Com HARRIS HARRIS CORPORATION Broadcast Equipment Div s1on 1 23 H ampshire Street Quincy lll1no s 62301...