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Summary of Contents for Model A

Page 1: ...Organ Manual for the SERVICE ENGINEER Models A A 100 AB BC BCV BV B2 B3 C CV C2 C2 G C3 D DV D 100 E G GV RT RT2 RT3 The This manual is intended for FREE distribution...

Page 2: ...BA were intentionally removed due to lack of documentation of the player section Also removed were any references to buying new parts as well as the Parts List itself due to their obsolescence The di...

Page 3: ...THE HAMMOND ORGAN MANUAL FOR THE SERVICE ENGINEER HAMMOND ORGAN COMPANY North Western Avenue Chicago Diversey Ave Chicago North 25 Avenue Melrose Park th Copenhagen Court Franklin Park Illinois USA...

Page 4: ...Company in its guarantee gives the customer assurance that adequate facilities will be available at all times to service the instrument This manual is designed to supply the service technician with al...

Page 5: ...the following tests be performed before returning the product to the owner after any service operation Plug the AC line cord directly Into a line voltage AC receptacle do not use an Isolation transfor...

Page 6: ...THE HAMMOND ORGAN 1 INTRODUCTORY SECTION HAMMOND ORGAN COMPANY North Western Avenue Chicago Diversey Ave Chicago North 25 Avenue Melrose Park th Copenhagen Court Franklin Park Illinois USA...

Page 7: ...chable TONAL 9 preset keys and 2 sets of 9 adjustable harmonic drawbars CONTROLS for each manual 2 adjustable drawbars 16 and 8 for pedals EXPRESSION One expression pedal controlling Swell Great and P...

Page 8: ...36 to November 1942 SELLING PRICE 1 342 00 Walnut MODEL BV Same as Model B but equipped with Hammond Vibrato providing three degrees of true Vibrato and off position effective simultaneously on both m...

Page 9: ...S Swell and Great 61 playing keys each PEDAL KEYBOARD 25 note radiating detachable TONAL 9 preset keys and 2 sets of 9 adjustable harmonic drawbars CONTROLS for each manual 2 adjustable drawbars 16 an...

Page 10: ...E 1 193 00 Walnut MODEL CV Same as Model C but equipped with Hammond Vibrato including Vibrato Chorus IN PRODUCTION September 1945 to December 1949 SELLING PRICE 1 782 00 Walnut MODEL C 2 Same as Mode...

Page 11: ...ith Hammond Vibrato including Vibrato Chorus See BCV None produced Kit added in field MANUALS Swell and Great 61 playing keys ch PEDAL KEYBOARD 25 note radiating detachable TONAL 9 preset keys and 2 s...

Page 12: ...9 preset buttons and 2 sets of 9 adjustable harmonic draw CONTROLS bars for each manual for pedals 4 numbered and labeled toe pistons 2 adjustable drawbars 16 and 8 and Great to Pedal 8 coupler EXPRE...

Page 13: ...ut has a reverberation control unit Produced from June 1941 to November 1944 MODEL C 2G C 3G CONSOLES AND HR 40G These consoles are identical in appearance to the C 2 and C 3 except that a monitor spe...

Page 14: ...gether with Vibrato Chorus usable in three different degrees and off IN PRODUCTION July 1949 to September 1949 SELLING PRICE 2 475 00 Walnut CONCERT Same as Model RT but with controls which provide Vi...

Page 15: ...o effects 32 foot Bourdon 32 foot Bombarde 16 foot Solo 8 foot Solo 4 foot Solo 2 and 1 foot Solo Also tablets for Mute Control and Pedal Solo On TONAL 9 preset keys and 2 sets of 9 adjustable harmoni...

Page 16: ...IONS 27 wide 30 high 15 deep FINISH American Walnut WEIGHT 113 pounds OUTPUT 20 watts 1 amplifier 2 12 speakers AC INPUT Approximately 180 watts This small decorative tone cabinet is used for homes mo...

Page 17: ...00 DIMENSIONS 26 1 2 wide 28 high 19 deep FINISH Black lacquer WEIGHT 155 pounds OUTPUT 40 watts 2 amplifiers 4 12 speakers AC INPUT Approximately 360 watts A non decorative double strength cabinet de...

Page 18: ...2 deep FINISH Walnut stain WEIGHT 225 pounds OUTPUT 40 watts 2 amplifiers 4 12 speakers AC INPUT Approximately 360 watts A semi decorative double strength cabinet designed for use individual or in gro...

Page 19: ...with Reverberation Unit IN PRODUCTION 1939 1942 SELLING PRICE 407 00 MODEL CX 20 Equipped with rotor tremulant See Page TC 7 for picture of this feature IN PRODUCTION January 1939 to March 1942 SELLI...

Page 20: ...DIMENSIONS 29 wide 53 high 18 1j4 deep FINISH Matched American butt walnut and antique brass hardware WEIGHT 153 lbs OUTPUT 20 watts 1 amplifier 2 12 speakers AC INPUT Approximately 200 watts TC 5...

Page 21: ...plifiers and 4 12 speakers AC INPUT Approximately 360 watts The C 40 cabinet has a wide variety of applications It is especially adapted for use in enclosures where the indirect projection of sound is...

Page 22: ...ipped with rotor tremulant IN PRODUCTION October 1938 to June 1942 SELLING PRICE 249 00 MODEL DR 20 Equipped with reverberation unit IN PRODUCTION August 1939 to March 1952 SELLING PRICE 319 00 MODEL...

Page 23: ...NS 31 wide 38 3 4 high 18 deep FINISH Walnut WEIGHT 144 pounds OUTPUT 20 watts 1 amplifier 2 12 speakers AC INPUT Approximately 200 watts The ER 20 tone cabinet is electrically equivalent to the DR 20...

Page 24: ...h 28 3 8 deep FINISH Walnut stain WEIGHT F 40 208 lbs FR 40 228 lbs OUTPUT 40 watts 2 amplifiers 4 12 speakers AC INPUT Approximately 300 watts The F 40 replaces the B 40 tone cabinet Dimensions of th...

Page 25: ...DIMENSIONS 32 l 2 wide 48 high 15 7 8 deep WEIGHT K 40 and H 40 147 lbs KR 40 and HR 40 162 lbs AC INPUT H 40 Early Units 234 watts Later units 175 watts HR 40 Early Units 240 watts Later units 175 w...

Page 26: ...e restricted The tone cabinet contains separate amplifier sections for treble and bass response with cross over point at 200 cycles Amplifiers are not interchangeable with amplifiers in other model to...

Page 27: ...e home small church mortuary and entertainment places Its response is non directional with the highs pro jected vertically and the lows horizontally The amplifier is constructed with separate sections...

Page 28: ...T 185 watts OUTPUT 20 watts Equipped with two 15 speakers for bass tones and two 12 speakers for the treble tones They provide three dimension amplification which creates a beautiful reverberation eff...

Page 29: ...t with reverberation can add the additional power required for larger installation at a minimum cost Can also be used alone where sufficient natural reverberation is evident The Q 40 is electrically s...

Page 30: ...36 5 8 high 17 1 4 deep WEIGHT 121 lbs AC INPUT 220 watts OUTPUT 50 watts E I A Equipped with two 15 speakers for bass tones and two 12 speakers for the treble tones They provide three dimension ampli...

Page 31: ...verberation chambers The treble direct speaker is normally mounted in the top In an unusual installation where the ceiling is very low or cabinets are stacked or radiation is otherwise restricted it i...

Page 32: ...A 105 Tudor Oak Feb 63 to Oct 653 025 00 A 122 Contemporary Patina Walnut July 64 to Oct 652 695 00 A 143 Early American Med Cherry Aug 64 to Oct 65 2 770 00 MANUALS Swell and Great 61 playing keys ea...

Page 33: ...don 32 foot Bombarde 16 foot Solo 8 foot Solo 4 foot Solo 2 and 1 foot Solo Also tablets for Mute Control and Pedal Solo On TONAL 9 preset keys and 2 sets of 9 adjustable harmonic drawbars CONTROLS fo...

Page 34: ...AMMOND ORGAN 2 GENERAL DESCRIPTION OPERATING INSTRUCTIONS HAMMOND ORGAN COMPANY North Western Avenue Chicago Diversey Ave Chicago North 25 Avenue Melrose Park th Copenhagen Court Franklin Park Illinoi...

Page 35: ...mental pitch and a number of harmonics or multiples of the fundamental frequency The fundamental and eight harmonics available on each playing key are individually controllable by means of drawbars an...

Page 36: ...The Concert Model Hammond Organ The Home Model Hammond Organ The Self Contained Model Hammond Organ 3...

Page 37: ...ent tone color which has been set up on the preset panel located inside the console These tone colors are set up at the factory in accordance with a standard design which has been found to best meet t...

Page 38: ...ions with silent spots between them Later consoles are equipped with continuous contact drawbar s which move smoothly with no interruption in tone HARMONIC DRAWBARS FOR THE PEDALS In the pedals the ha...

Page 39: ...orus generator will be found To use the tones generated by this unit at will one extra black drawbar has been added which operates a switch located on the generator The drawbar labeled chorus is locat...

Page 40: ...control is turned as far as possible to the left the tremulant is entirely off As it is turned to the right clockwise the degree of tremolo gradually increases until it reaches a maximum at the extre...

Page 41: ...eature Models B 3 C 3 RT 3 A 100 and D 100 is controlled by four tilting tablets Fig 8 at the upper right side of the manuals Percussion is available only on the upper manual and only when the B prese...

Page 42: ...are acoustically dead or have insufficient natural reverberation A portion of the musical signal is delayed by passing through fluid damped coil springs and then combined with the direct signal By ad...

Page 43: ...ched to the tone cabinet The tone generator is lubricated by putting oil into cups inside the console It is recommended that each cup be filled three fourths full 1 tablespoon once a year using only t...

Page 44: ...re heard from the 8 speaker located to the right of the player In operation an electrical signal from the reverberation drive channel is applied to the driver unit in the reverberation device which th...

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Page 55: ...THE HAMMOND ORGAN 3 ACOUSTICS HAMMOND ORGAN COMPANY North Western Avenue Chicago Diversey Ave Chicago North 25 Avenue Melrose Park th Copenhagen Court Franklin Park Illinois USA...

Page 56: ...he size and shape of the enclosure placement of tone cabinets amount and location of sound absorbing materials including persons present in the enclosure The use for which the organ is desired also ha...

Page 57: ...nce This allows the organist to accurately judge the musical effect he is producing and make any necessary corrections before the audience appreciates the need for them It also reduces the tendency of...

Page 58: ...e is greatly reduced when an audience is present In general the higher the ceiling of the auditorium the less effect the presence of an audience has on the reverberation time however this effect is al...

Page 59: ...ke minor corrections The following principles of reverberation chamber design are given for guidance in properly evaluating the good and bad characteristics of a given chamber and in making such chang...

Page 60: ...sions the reverberation time is increased as the area of the tone opening is reduced A large chamber therefore may have a large tone opening and still furnish sufficient reverberation whereas a small...

Page 61: ...OND ORGAN 4 CABLES PLUG ASSEMBLIES CABLE CONNECTION DIAGRAMS HAMMOND ORGAN COMPANY North Western Avenue Chicago Diversey Ave Chicago North 25 Avenue Melrose Park th Copenhagen Court Franklin Park Illi...

Page 62: ...fier and a ground signal return conductor which is actually a shield over the B plus wire This cable is especially designed for use with the Hammond Organ and is approved by the Underwriters Laborator...

Page 63: ...supplied through the console without damaging the console switch or wiring The name plate on each cabinet shows its wattage rating If the tone cabinet power requirements exceed 620 watts some of the c...

Page 64: ...ditional amplifiers Some reverberation preamplifiers employ a special detachable coupling cable wired as shown at the bottom of Figure 10 In reverberation equipped tone cabinets type CR 2O DR 2O ER 2O...

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Page 69: ...his become necessary the leads to the speakers can be consolidated in four conductors Figure 11 shows how this is accomplished using the two male plugs on the speakers In this arrangement the stud con...

Page 70: ...THE HAMMOND ORGAN 5 MAIN GENERATOR HAMMOND ORGAN COMPANY North Western Avenue Chicago Diversey Ave Chicago North 25 Avenue Melrose Park th Copenhagen Court Franklin Park Illinois USA...

Page 71: ...g motor extends the entire length of the generator Twenty four driving gears two each of twelve sizes are mounted on this shaft and the drive shaft itself is divided into several sections connected by...

Page 72: ...he generator may be sluggish in starting and in time the threads may gum up and prevent the proper flow of oil The two spring couplings on the motor shaft the flexible couplings between sections of th...

Page 73: ...efore it is not recommended that the service man attempt this adjustment As a means of eliminating any vagrant harmonics that may be present there are filters consisting of small transformers and cond...

Page 74: ...een twelve have thirty two twelve have sixty four twelve have one hundred and twenty eight and seven have one hundred ninety two An assembly with a two tooth wheel also has a thirty two tooth wheel wh...

Page 75: ...his generator has twelve complex tone wheels and is identical to the one above except for the generator cover Because the output terminals of this cover are not in order of frequency See figure 6 this...

Page 76: ...Figure 1 6...

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Page 79: ...THE HAMMOND ORGAN 6 CHORUS GENERATOR HAMMOND ORGAN COMPANY North Western Avenue Chicago Diversey Ave Chicago North 25 Avenue Melrose Park th Copenhagen Court Franklin Park Illinois USA...

Page 80: ...ference be present in the higher register in order to avoid too rapid undulation The chorus generator assembly like the main generator has a drive shaft with twenty four brass gears Each gear drives a...

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Page 82: ...Figure 5 there is no figure 4 JL below shows the signal flow between both Main and Chorus Generator 3...

Page 83: ...THE HAMMOND ORGAN 7 CONSOLE POWER WIRING HAMMOND ORGAN COMPANY North Western Avenue Chicago Diversey Ave Chicago North 25 Avenue Melrose Park th Copenhagen Court Franklin Park Illinois USA...

Page 84: ...tarting motor which is disengaged from the rotating shaft by a spring It should be noted that the synchronous motor can supply power only at synchronous speed Therefore if for any reason the system fa...

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Page 89: ...ORGAN 8 MANUALS PEDALS MATCHING TRANSFORMERS and PRESET PANEL HAMMOND ORGAN COMPANY North Western Avenue Chicago Diversey Ave Chicago North 25 Avenue Melrose Park th Copenhagen Court Franklin Park Il...

Page 90: ...9 preset keys and 2 adjust keys each of which operates nine small bronze contact springs with precious metal points See figure 2 When a key is pressed these points make contact with nine busbars exte...

Page 91: ...ver nine busses which are connected to taps on the matching transformer These correspond to different intensities of sound as shown by numbers on the drawbars The two left groups of drawbars are assoc...

Page 92: ...is assemblies are equipped with continuous contact drawbars Manual Chassis Assembly Model E The appearance of the upper or swell manual and the lower or great manual is the same as on other models exc...

Page 93: ...ls are wired alike from drawbar 2 to drawbar 8 inclusive but the wiring of drawbars 1 and 9 varies Column A shows the wiring of drawbar 1 for consoles above serial number 17075 column B refers to all...

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Page 95: ...oil and resistor mounted on the manual assembly are wired to the lower drawbar see figures 8 9 10 11 and serve to filter out any higher harmonics or transients which might be present in the lower peda...

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Page 100: ...ires carry the pedal tones from the busbars to the pedal drawbars The wires are connected first to a resistor panel on the back of the manual assembly A small choke coil and resistor mounted on the ma...

Page 101: ...busbars in the great manual while the lower two connect to the lower pedal drawbar and permit it to be used with the coupler Connections from the pedals to the manual are indicated in Figure 12 A low...

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Page 103: ...r the right end as you look in at the back It should be adjusted as described under Manual Busbar Shifters on page 3 of this section Pedalclavier Pedal keys are set at the factory for average tension...

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Page 105: ...e of the pedal switch near the left end as you look in at the back It should be adjusted as described under Manual Busbar Shifters on page 3 of this section Pedal Keyboard Pedal keys are set at the fa...

Page 106: ...e desired intensity of that harmonic This is equivalent to setting a harmonic drawbar to the corresponding number Preset combinations may be changed at will by removing the console back and following...

Page 107: ...22 with the new one 3 Small core transformers used in selective vibrato organs Models B 2 C 2 and RT 2 having preamplifiers code A B and C Two transformers are used in each organ one with large stack...

Page 108: ...PRESET CRADLE RETURN SPRING Earlier instruments had coil springs of various types to perform the function of returning the cradle assembly to its rest position and replacement when necessary became ra...

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Page 110: ...THE HAMMOND ORGAN 9 TREMULANT RHEOSTAT BOX HAMMOND ORGAN COMPANY North Western Avenue Chicago Diversey Ave Chicago North 25 Avenue Melrose Park th Copenhagen Court Franklin Park Illinois USA...

Page 111: ...o a position of no resistance the tremulant switch is shorted out Conversely when the control is turned to its maximum resistance the movement of the eccentric varies the resistance of the circuit per...

Page 112: ...series of 32 contacts tipped with precious metal The contacts are connected to fixed carbon resistors Resistor R2 in figures 2 and 4 forms a constant load on the matching transformer while R4 and C4...

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Page 121: ...THE HAMMOND ORGAN 10 VIBRATO PERCUSSION HAMMOND ORGAN COMPANY North Western Avenue Chicago Diversey Ave Chicago North 25 Avenue Melrose Park th Copenhagen Court Franklin Park Illinois USA...

Page 122: ...dness variation It is comparable to the effect produced when a violinist moves his finger back and forth on a string while playing Varying the frequency while maintaining constant volume Figure 1 FUND...

Page 123: ...n the vibrato output signal is mixed with a portion of signal without vibrato For vibrato chorus part of the incoming signal appears across the vibrato line and the rest across a resistor in series wi...

Page 124: ...Figure 9 Figure 3a Vibrato Line Box Used in B3 C3 RT 3 after c 1957 and all A 100 and D 100 organs Figure 2 Vibrato Line Box used with circuits shown in Figures 6 7 8 These pictures are to represent s...

Page 125: ...three off positions between them and there is a separate vibrato chorus switch A resistor connected to the off side of the chorus switch serves to maintain constant volume for the two switch positions...

Page 126: ...parate channels into which signals from the vibrato great and vibrato swell tablets are fed The vibrato signal goes through a preliminary amplifier through the vibrato system and then into additional...

Page 127: ...e amount of vibrato effect as the 25 sections previously used The switch has one less contact in each position and so neither the vibrato line nor the vibrato switch is interchangeable with earlier ty...

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Page 129: ...rough the control tube transformer T6 a high pass filter and terminal D to the grid of V4 Immediately condenser C31 in the control tube grid circuit begins to discharge causing the signal to fade away...

Page 130: ...rge and for V7 control grids to reach cut off Also to preserve the same effective loudness in fast decay position as in slow decay the control tube bias is reduced by disconnecting R59 and allowing co...

Page 131: ...THE HAMMOND ORGAN 11 AMPLIFICATION HAMMOND ORGAN COMPANY North Western Avenue Chicago Diversey Ave Chicago North 25 Avenue Melrose Park th Copenhagen Court Franklin Park Illinois USA...

Page 132: ...en of the input tube This terminal is normally grounded and the input device should have an impedance of 500 ohms or less in order not to reduce the volume of the organ A signal level of a volt or mor...

Page 133: ...ranges in variance with those specified Weston Model 772 type 2 analyzer is satisfactory for all necessary tests of the organ and when combined with a tube checker in Weston s Model 775 it is a compl...

Page 134: ...e for a red body green end and orange dot or center band would be all follows first digit 2 second digit 5 followed by three ciphers thus 25 000 ohms Chokes and audio transformers may be tested by ref...

Page 135: ...THE HAMMOND ORGAN 12 REVERBERATION HAMMOND ORGAN COMPANY North Western Avenue Chicago Diversey Ave Chicago North 25 Avenue Melrose Park th Copenhagen Court Franklin Park Illinois USA...

Page 136: ...springs and thereby provides adequate reverberation in locations where the natural reverberation is not sufficient OPERATION OF FLUID TYPE The fluid type reverberation unit see figure 1 about 4 x 5 in...

Page 137: ...Figure 1 2...

Page 138: ...the vibration is dissipated by fluid friction in the short tube Just above the short damping tube a reflecting pin attached to the spring causes partial reflection of high frequencies and helps to mak...

Page 139: ...everberation unit or tone cabinet the damping fluid furnished in bottles with the unit should be added with care following directions on the tone cabinet instruction card The level in the three long t...

Page 140: ...es on the organ sound excessively loud while others sound weak it may be traceable to the reverberation control system In investigating this disconnect the reverberation system by turning the switch o...

Page 141: ...Failure to lock the unit when moving usually necessitates replacement of the complete driver assembly or the upper or lower lever assemblies which are a part of it When parts are replaced the springs...

Page 142: ...TONE CABINETS The dry type reverberation device mounted in the PR and OR series tone cabinet functions as follows Part of the console signal is applied to the reverberation driver and the resultant r...

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Page 144: ...different kits are available depending upon the type of console and the instruction sheet accompanying each kit describes the installation and operation These kits are designed for use with PR and QR...

Page 145: ...THE HAMMOND ORGAN 13 PEDAL SOLO UNIT HAMMOND ORGAN COMPANY North Western Avenue Chicago Diversey Ave Chicago North 25 Avenue Melrose Park th Copenhagen Court Franklin Park Illinois USA...

Page 146: ...or circuit are controlled by a volume control knob and eight tilting stop tablets of which one turns all the pedal solo tones on or off and the others provide various pitch registers and tone colors T...

Page 147: ...ube to transmit the signal to the amplification system with a controlled rate of attack COMPONENTS OF THE PEDAL SOLO UNIT Electrically the pedal solo unit is very similar in principle to the Hammond S...

Page 148: ...plate current it holds the other in a cut off condition Suppose for example that the first triode is conducting and the second is cut off Now a negative input pulse impressed on the grids of both tri...

Page 149: ...oses where the 16 foot tone is desired The 32 BOURDON stop produces an effect which is mostly felt as a very low bass undulation when playing low in the first octave of pedals The 32 BOMBARDE is alway...

Page 150: ...other registers will be in tune because they are locked by the frequency dividers to exact octave intervals Wiring of Pedal Switch The nine contacts of each pedal key make contact with nine busbars ex...

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Page 152: ...lo generator b Loose cable connector See that the 15 pole plug and the shielded plug are inserted tightly into the pedal solo generator c Keying circuit A dirty contact in the PEDAL SOLO ON tablet or...

Page 153: ...erator cable or the main generator wiring since the control circuit is completed through the main generator All pedals fail to play on one stop tablet If all other tablets play correctly the signal fr...

Page 154: ...with the organ If you are sure some notes actually require tuning proceed as follows a Disconnect the two cable leads from the G G terminals on the preamplifier and ground the two wires Connect one s...

Page 155: ...near rear 4 Remove two screws passing up through right hand chassis block of lower manual into control panel 5 Remove one screw holding angle bracket to bottom cover of control panel 6 Tilt upper manu...

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Page 157: ...THE HAMMOND ORGAN 14 ECHO ORGAN EQUIPMENT HAMMOND ORGAN COMPANY North Western Avenue Chicago Diversey Ave Chicago North 25 Avenue Melrose Park th Copenhagen Court Franklin Park Illinois USA...

Page 158: ...in the center both main and echo will sound simultaneously The switch controls only the signal circuits and all cabinets remain energized as long as the console is turned on Figures 1 and 2 show how t...

Page 159: ...ier and rheostat box leaving wires connected and remove mounting channel 4 Remove 4 screws from pedal switch cover panel remove key at top of wiring tube nearest to swell pedal raise tube a few inches...

Page 160: ...binet sounds with the switch in echo position interchange the main and echo cable wires at the echo wiring panel INSTALLING KIT IN CONCERT MODEL E CONSOLES In this model the preamplifier is located so...

Page 161: ...eps 1 2 3 and 4 above c Mount echo receptacle in outlet box see figure 5 Cut off 6 conductor cable to proper length to connect it to outlet box and mount 6 conductor plug and plug cap on remaining pie...

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Page 163: ...assis and disconnect two black wires from the BN BK speaker terminal inside of the amplifier Leave output transformer lead connected Connect the two wires removed to the center lug of the three lug te...

Page 164: ...re to the empty lug on the speaker long enough to reach the earphone jack 11 Solder a wire to the right speaker terminal long enough to reach the earphone jack This terminal is grounded inside the AO...

Page 165: ...ND ORGAN 15 EXTRA EQUIPMENT for organs prior to the 3 series HAMMOND ORGAN COMPANY North Western Avenue Chicago Diversey Ave Chicago North 25 Avenue Melrose Park th Copenhagen Court Franklin Park Illi...

Page 166: ...ate amplifier is not available NOTES IN REFERENCE TO FIGURES 1 to 6 The volume control shown in these drawings is required because the expression pedal of the organ does not affect the volume of any a...

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Page 168: ...reverberation control crystal earphones will be very satisfactory if connected as shown in figure 10 On an organ equipped with reverberation control the power amplifier connection is best and good qu...

Page 169: ...many types and brands of tape wire and disc recorders it has not been possible for us to test each make and give definite recommendations for obtaining good recordings For specific questions regardin...

Page 170: ...connect the recorder output to the organ as directed under microphones and record players on a previous page For Connecting Electrically To The Preamplifier Home Church and Concert Models refer to fi...

Page 171: ...ckup is preferred the usual arrangement is to place a microphone about three feet above the top of the tone cabinet and inclined at an angle of about 45 degrees Because types JR 2O H 40 and HR 40 tone...

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Page 173: ...nd solder heater cord ends to terminals 8 and 13 counting from left of panel as shown in figure 1 4 Replace terminal panel cover plug heater in socket and attach red instruction tag to power cord plug...

Page 174: ...4 or a 5 32 drill 3 Using two screws lock washers and nuts provided with kit mount heater socket and one of the cable clips The clip is fastened by the left hand socket mounting screw 4 Mount the rema...

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Page 176: ...from the output of a DC to AC converter Failure to provide a converter of adequate size may result in low line voltage and impaired operation of the instrument CIRCUIT Figure 1 shows a circuit diagram...

Page 177: ...ent of pitch is possible by moving a weight on the vibrating arm A single weight is provided for this purpose Moving this weight toward the center of the arm raises the pitch and moving it toward the...

Page 178: ...number of Console is below No 328 it will be necessary to interchange wires 8 and 9 in order to make revamped panel connections check with diagram shown above If serial number is below No 775 it may...

Page 179: ...Figure 3 14...

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Page 181: ...e a type A 107 relay for this purpose Type 3040A5 relay manufactured by the Automatic Electric Company is used in series with the console run motors and type A 107 manufactured by the Allen Bradley Co...

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Page 184: ...he 6 pole plug Remove these wires from cable 5 Remove wires from pins 1 and 5 of the 5 pole plug Remove these wires from cable 6 Install a 250 ohm 20 watt resistor across pins 1 and 5 of the 5 pole pl...

Page 185: ...NSOLE DIAGRAMS THE HAMMOND ORGAN 16 WIRING SCHEMATIC DIAGRAMS HAMMOND ORGAN COMPANY North Western Avenue Chicago Diversey Ave Chicago North 25 Avenue Melrose Park th Copenhagen Court Franklin Park Ill...

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Page 207: ...LE PRE AMPLIFIERS THE HAMMOND ORGAN 16 WIRING SCHEMATIC DIAGRAMS HAMMOND ORGAN COMPANY North Western Avenue Chicago Diversey Ave Chicago North 25 Avenue Melrose Park th Copenhagen Court Franklin Park...

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Page 223: ...TION AMPLIFIERS IN CONSOLES THE HAMMOND ORGAN 16 WIRING SCHEMATIC DIAGRAMS HAMMOND ORGAN COMPANY North Western Avenue Chicago Diversey Ave Chicago North 25 Avenue Melrose Park th Copenhagen Court Fran...

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Page 230: ...DAL SOLO UNITS THE HAMMOND ORGAN 16 WIRING SCHEMATIC DIAGRAMS HAMMOND ORGAN COMPANY North Western Avenue Chicago Diversey Ave Chicago North 25 Avenue Melrose Park th Copenhagen Court Franklin Park Ill...

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Page 239: ...OWER REVERBERATION AMPLIFIERS THE HAMMOND ORGAN 16 WIRING SCHEMATIC DIAGRAMS HAMMOND ORGAN COMPANY North Western Avenue Chicago Diversey Ave Chicago North 25 Avenue Melrose Park th Copenhagen Court Fr...

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Page 267: ...THE HAMMOND ORGAN 17 TROUBLESHOOTING HAMMOND ORGAN COMPANY North Western Avenue Chicago Diversey Ave Chicago North 25 Avenue Melrose Park th Copenhagen Court Franklin Park Illinois USA...

Page 268: ...ocked position if it is not unlock as indicated on instruction card on tone cabinet 2 7 Insert all connector plugs into their receptacles Plug should seat firmly and must make good contact Inspect all...

Page 269: ...cabinet is located with the open back placed 2 inches or more from the wall or other obstruction Be sure that adequate ventilation has been provided 2 16 Check all tubes for cracks in glass or base a...

Page 270: ...int brush with camel s hair bristles d lint free bleached cloth e Compressed air f Crocus cloth 2 24 Remove corrosion rust or dirt Blowout dirt and dust from the interior of the console and the tone c...

Page 271: ...ot neglect the short circuiting test 2 34 CABLES AND CONNECTORS 2 35 INSPECTING Inspect cables for cracked frayed or deteriorated insulation at the connecting or supporting points Inspect the cables o...

Page 272: ...rcent tolerance and silver indicating 10 percent tolerance Replace resistors differing by as much as 30 from their rated values 3 6 COIL MEASUREMENTS For the DC direct current resistance value of chok...

Page 273: ...the manual chassis generators and pedal switch Trouble occurring over the full range of tones and present at the input to the console preamplifier can usually be traced to a defect in the mixing trans...

Page 274: ...of each filter reactor and capacitor on the generator cover Fasten a short piece of wire to the 6 busbar from the bottom on the preset panel and test each terminal of the th filter Reference paragrap...

Page 275: ...rew so that the magnet is held firmly in position d Do not remove main tone generator assembly from the console unless absolutely necessary Should this be necessary proceed as directed in paragraphs 5...

Page 276: ...9...

Page 277: ...the harmonics in relation to the fundamental note as selected either by the preset key or drawbars The numbers of the preset panel and drawbars indicate a progressive increase in intensity starting f...

Page 278: ...end of a test lead to the 5 preset panel busbar from the th bottom g Place the organ in operation h Check the AC input voltage at the console preamplifier terminal board the voltage should be 117 vol...

Page 279: ...emblies require alignment c Loosen the set screw which holds the coil assembly in position d Compare the intensity of the note associated with the aligned coil with the intensity of adjacent notes e T...

Page 280: ...dge the dust particles adjust the busbar shifters See Rear View of consoles at end of General Descriptions figure 21 in Manuals Pedals etc and figures 4 2 4 3 below Busbar shifter A located behind the...

Page 281: ...quently 4 of the tone wheel subassemblies each containing 2 tone wheels operate at each of 12 different speeds Each driving gear with its associated bakelite gears and 4 tone wheels is contained in a...

Page 282: ...15...

Page 283: ...sirable frequencies 5 9 Filters for eliminating spurious harmonics from the generated simple tones are located on the top of the main tone generator and consist of filter capacitors and reactors See f...

Page 284: ...ucing the driving power of the start motor Because of the braking action and the loss of power of the start motor the system slows down to and locks into synchronous speed the run motor then begins to...

Page 285: ...ase The rate at which this phase shift occurs will depend on how many line sections are scanned each second 5 19 Since a cycle is equivalent to 360 electrical degrees a frequency shift of 1 cycle occu...

Page 286: ...ationary plates and a rotor whose plates mesh with the stationary ones In Index B of the same figure two sets of plates have been removed to show the rotor 5 27 Signals coming from the line through th...

Page 287: ...he 9 preset keys C to A are connected by flexible leads to the preset panel in the back of the console See Rear Views of consoles at end of General Descriptions section The preset panel consists of 2...

Page 288: ...nput circuits Vibrato ON or OFF circuit 5 40 Power to operate the preamplifier and power amplifier is supplied through the run switch circuit as shown in the console schematic 5 41 Preamplifier Circui...

Page 289: ...determined rate 5 49 With the percussion tablet on B adjust key pressed and an upper manual playing key pressed the second or third harmonic signal goes to percussion input terminal H on the preampli...

Page 290: ...of Wiring and Schematic Diagrams 5 55 This is a 3 channel amplifier with 2 treble channels one for non reverberated and one for reverberated signal and a bass channel with a cross over point of 200 cy...

Page 291: ...nderneath the console and the 2 machine screws under the front lower manual rail that hold the entire manual chassis in place 5 67 Disconnect the 79 manual leads 68 pedal leads 4 ground wires and the...

Page 292: ...will be accomplished as follows a Remove the four screws from the left and right hand side panels of the music rack Tilt the bottom of the rack by lifting the side panels and then remove the rack by...

Page 293: ...lts under the console and the 2 machine screws under the front lower rail that secure the entire manual chassis in place e Disconnect all preamplifier leads f Loosen set screw in expression control le...

Page 294: ...e operation of the generator run motor i Solder the leads of the replacement switch to the power terminal panel j Operate the switch to determine that it has been installed properly k Replace the rear...

Page 295: ...and remove the three threads from the one side of the oil cup by pulling them through the hole in the cup The thread from the other side of the cup need not be removed 5 Locate screws E which hold th...

Page 296: ...o indicate the starting point of the scanner cable also mark the location of the cable clip O 8 Stationary plates P and rotor Q are mounted on the main assembly chassis U Remove two 2 of the stationar...

Page 297: ...repair you need not go further in disassembly than step number eleven 11 but should conditions warrant further disassembly continue with number thirteen 13 otherwise install new insulators and reasse...

Page 298: ...1 inclusive as referenced in paragraphs 5 9 to 5 11 inclusive are resonant reactor capacitor units and will be replaced as follows a Unsolder all leads b Remove the two screws holding the filter c Rem...

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