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EBOGEN
INSTRUCTION MANUAL

MODEL TP160

AM/FM TUNER

OPERATING INSTRUCTIONS
POWER
Depress POWER ON button to turn on tuner. Turn off tuner by depressing button again to release it to the out position. AM knob until pointer indicates desired station on FM (top) dial. Carefully adjust TUNING knob until needle on tuning meter is at the center of the tuning dial, exactly on the circle above the letters "FM".

RECEPTION

NOTE Muting removes the annoying noise between FM stations. The muting circuitry may prevent the receiver from distinguishing a very weak signal from interstation noise. To tune in very weak stations, defeat the mute circuit by releasing the FM MUTE switch to the out position.

Depress AM button. Turn TUNING knob until pointer indicates desired station on AM (bottom) dial. Adjust TUNING knob until needle on tuning meter shows maximum deflection to right.

FM RECEPTION
Depress FM and FM MUTE buttons. Turn TUNING

SPECIFICATIONS
FM TUNER SECTION TUNING RANGE: 87.5 MHz to 108.5 MHz @ 3 0 0 f-I QUIETING SENSITIVITY: 1.5µV for 30 db @ 72fl 0.5µV for 20 db @ 72n HARMONIC DISTORTION: 0.3% at 100% modulation. FREQUENCY RESPONSE: 20-20,000 Hz fldb (after de-emphasis). HUM AND NOISE LEVEL: 70 db below 100% modulation. ALTERNATE CHANNEL SELECTIVITY: 60 db. LHFM DETECTOR BANDWIDTH: 900 kHz. CAPTURE RATIO: 1.9 db. IMAGE REJECTION: 60 db. I.F. REJECTION: 85 db. CROSS MODULATION REJECTION: 80 db. ANTENNA: 3OOfI balanced; 720 unbalanced or built-in line. MISCELLANEOUS AUDIO OUTPUT: Adjustable (rear panel), 0-1.2V OPERATING CONTROLS: Selector (Power, AM, FM, FM Mute), Tuning. POWER CONSUMPTION: 60W @ 120 vac, 6OHz OVERALL DIMENSIONS: 14-l/2" W x 3-3/4" H x 12" D RACK INTERIOR DIMENSIONS: 14" W x 3-l/4" H x 11" D WEIGHT: 9-l/2 Ibs. AM TUNER SECTION TUNING RANGE: 530 kHz to 1620 kHz. LOOP SENSITIVITY: 2µV @ 6db S/N and 60% modulation. ALTERNATE CHANNEL SELECTIVITY: (±l0 kHz) 40 db. HARMONIC DISTORTION: Less than 1% @ SO% modulation

LEAR SIEGLER, INC. PRlNTED IN U.S.A. 10-70A BOGEN DlVlSION
PARAMUS, N. J. 07652

54-5516-01

INSTALLATION INSTRUCTIONS
UNPACKING
NOTE This paragraph does not apply to tuners shipped as a part of a Bogen Centralized School Sound Systern console or rack. If the Model TP160 AM/FM Tuner is not part of a Bogen Centralized School Sound System console or rack, carefully unpack the carton and inspect the unit for damage. If a unit shipped to you proves to be damaged, make an immediate claim with the shipping carrier. If the unit was picked up directly from a dealer or distributor, make any damage claim directly to the seller without delay.

Figure 1 - Rack Mounting With Model RPK-31 Brackets

RACK INSTALLATION
NOTE This paragraph applies only to tuners which will be installed in a 19"equipment rack. The Model TP160 may be installed in a standard 19" equipment rack by using Model RPK31 rack mounting brackets. Remove the four screws securing the side of the cover. Do not remove the cover. Install the brackets as shown in figure 1, securing them to the tuner with the four screws supplied with the brackets. Each bracket has two elongated holes on three-inch centers for fastening to a standard 19" equipment rack.
HI-Z ANTENNA WIR

AM

GND

Figure 2 - Connecting AM Antenna

CONNECTING AM ANTENNA
An external antenna must be installed on any Model TP160 which will be used to receive AM broadcasts. Connect the antenna as shown in figure 2.

Connecting To External TV Antenna

CONNECTING EXTERNAL FM ANTENNA
IMPORTANT Always disconnect the FM Line Antenna when using an external FM antenna. The Model TP160 has an internal FM Line Antenna which may be used for receiving FM broadcasts. For improved reception, particularly in weak signal areas or for tuners mounted in consoles or racks, installation of an outdoor FM or "T" antenna is necessary. If you are installing a standard 300-ohm antenna system, connect the twin-lead transmission line as shown in figure 3a. If conditions require use of a coaxial transmission line, such as RG-11/U or RG-59/U, connect the cable as shown in figure 3b. Coaxial cable must be used when the transmission line is run in conduit.

For optimum performance, a separate FM antenna is recommended. If a TV antenna must be used for both FM and TV reception, install an FM signal splitter at the end of the transmission line, as shown in figure 4.

LEVEL CONTROL
Model TP160 AM/FM tuners shipped with Bogen Centralized School Sound System consoles or racks have the LEVEL control preset to the proper output for the booster amplifier. Tuners shipped separately have the LEVEL control set for maximum output, which is 1.2 volts. To decrease the audio output from the tuner, turn the LEVEL control counterclockwise. To increase the audio output, turn the LEVEL control clockwise.

MAINTENANCE
There are no user serviceable parts inside the unit and removal of the dust cover preservicing should be attempted only by a as follows: a) Remove front panel by pulling off TUNING knob and removing two Phillips-head screws. b) Connect dial cord at drum hook marked START in diagram. c) String dial around nylon pulleys and tuning shafe to drum hook marked FINISH in diagram. Make certain cord winds around tuning shaft from rear toward front, as shown. d) Attach end of cord with tension spring, making certain that spring applies enough pressure to prevent cord from slipping. e) Tune in a known station and attach dial pointer at proper position. Before securing pointer, twist cord as shown in diagram so cord will exert a slight pressure toward panel bracket and away from dial glass. REPLACING DIAL LAMP. Remove front panel as described in step a), above, and replace lamp with 6.3V No. 12 bulb (Bogen Part 94-0175-01).

BOGEN SERVICE
We are interested in your Bogen tuner for as long as you have it. If trouble ever develops with your unit, please do not hesitate to ask our advice or assistance. Write to Service Department, Bogen Division, Lear Siegler, Inc., P.O. Box 500, Paramus, New Jersey 07652. When communicating with us, give the model number and serial number of your unit. Describe the difficulty encountered and the effects each operating control has upon the trouble symptoms. Include details on electrical connections to associated equipment, and list such equipment. When we receive this information, we will send you service information if the trouble appears to be simple. If the trouble requires servicing, we will send you the name and address of the nearest Bogen authorized service agency to which you can send your unit for repairs. When shipping your unit, pack it carefully using the original shipping carton, or a similar container and filler material, to prevent damage in transit. Send the unit, fully insured and prepaid, via railway express or United Parcel. Do not ship via parcel post unless so instructed. DIAL CORD RESTRINGING. Refer to figure 5 and proceed

REPLACEMENT PARTS
Most components used in the Model TP160 are available through all reputable parts jobbers. The parts listed here are available from Bogen distributors, service agencies or directly from the factory. When ordering parts from Bogen, specify the part number and description, as listed below. Also give the Model TP160 and the Series designation, which is a letter followed by numbers stamped or screened on rear of the chassis. When ordering a part for the PC Board, also give the PC Board component number, which is 45-9764-01.

PULLEY

(SIDE

VIEW

.)

POINTER (FRONT VIEW) C74--1744

* PROPER LENGTH WHEN SPRING IS STRETCHED TO I':

Figure 5 - Dial Stringing Diagram

4

Ref. No.

Part No. 45-9764-01

Description

Ref. No.

Part No.

Description

Al

RF, IF Component Board Assy, Complete

c3 C6 c7 Cl3 Cl4 c25 C26 C30 c31 C35,36 c37 C40 c41 C46 CR1,4 CR2,3 FL-l, 2 FL-3 IC-1 IC-2 Ll MPl

79-005-044 79-209-001 79-008-057 78-221-121 78-221-116 79-005-049 78-221-113 78-250-005 78-201-099

T3 T4 T5

96-5153-01 965157-01 96-5151-01

Transformer, 2nd AM IF Transformer, FM IF Transformer, FM Discriminator

79-005-049 79-005-055 96-5093-02 96-5093-01 78-959-001

Q1, 2
Q3,4

Q5 Q6,7
R90 Tl T2

95-5158-01 96-5238-02 96523801 95-5146-01 94-1277-01 96-5221-01 96-5235-01 96-5237-01 96-5213-01 77-001-691 95-5156-01 95-5152-01

Capacitor, Electrolytic, 2µF, 25 V Capacitor, 5pF, 500 V Capacitor'50 µ F, 50 V Capacitor, 470pF Capacitor, 180pF Capacitor, 25 µF, 35 V Capacitor, 1OOpF Capacitor, .06µ F, 50 V Capacitor, 6.8pF, 5% (Same as C26) (Same as C13) Capacitor, Electrolytic, 25µF, 25V Capacitor, Electrolytic, 4µF, 50 V (Same as C3) Diode, lN541 Diode, lN542, Matched Pair Ceramic Filter, FM IF (Specify Color Code) Mechanical Filter, 455 KHz Integrated Circuit, 1st FM IF . Integrated Circuit, 2nd FM IF Coil, Choke, 56µ H FM Tuner Assembly Transistor, 2N5127 Transistor, 2N5126 Transistor, BC147B Transistor, 2N5089 Control, Mute Adj., 47 K Transformer, AM Oscillator Transformer, 1st AM IF

Chassis Electrical Parts

ClOl-Cl04 Cl07 Cl08 Cl09 Cl10 CRlOl, 102 CR103 1101,102 LlOl, 102 L103 L104 Ml01 R107 SW102-104 SW101 TlOl

78-201-115 78-200-100 79-005-062
79-005-054 79-005-039

96-5109-01 96-5248-04 94-0175-01 95-5148-01 95-5159-01 95-5015-01 94-1309-01 77-001-467 81-004-053 81-003-049 83-750-000

Capacitor, 15OpF, 500 V Capacitor, 15pF, 1400 V Capacitor, Electrolytic, 5 0 0 µ F , 50V Capacitor, Electrolytic, 700µ F, 35 V Capacitor, Electrolytic, 1000µF, 15V Diode, lOOmA, 150 PIV Diode, Zener, 12 V, 1 W Lamp, Dial Coil, RF Choke, 3.9 µ H Coil, AM Antenna Coil, RF Choke, 1µ H Meter, Tuning Control, LEVEL Assembly, Pushbutton Switch Switch, SPST, 3 A, with Cover Transformer, Power

Mechanical Parts -

-

Dial Cord 12-4165-01 Dial Glass 02-9003-08 Dial Spring 22-5234-01 Cover 14-9064-01 Foot, Cover 03-0629-02 Knob, Tuning

12-4503-01

ALIGNMENT
The following instruments (or equivalent) are required for a complete alignment of the receiver. DC VTVM, RCA WV98-C AC VTVM, HP 400D AM Signal Generator, Measurements Corp 65-B FM Sweep Generator, Measurements Corp 88 or Boonton Radio Corp 202H
AM Alignment FM Alignment

To align the FM section, follow the procedure given in Table II. See figure 7 for location of adjustments.
FROM GENERATOR (25A)

I

1

To completely align the AM section, start with the last AM IF transformer and work back toward the antenna. In order to limit the effect of the AGC circuit, continually reduce the generator signal level to the minimum required for an output indication. Make the adjustments listed in Table I. See figure 6 for location of alignment adjustments.

15on A74-1479-01

u

Figure 6 - Dummy Antenna for FM Alignment

TABLE I - AM ALIGNMENT CHART (See Figure 7) NOTE: Set Selector Switch to AM Step 1 Band & Dial Setting Indicator at Extreme left end of dial Generator Frequency 455 kHz 30%, AM Mod at 400 Hz. Generator output level 5µV, maximum 600 kHz, 30% AM Mod at 400 Hz. Generator output level 1 mV, maximum. 1400 kHz, 30% AM Mod at 400 Hz. Generator o output level 5 0 0 µ V , maximum. Signal Input Through .05 MFD capacitor to TP-22, terminal 22 of Al. Indicator and Connection DC VTVM at TP-, 2, terminal 2 of Al. Adjustment and Indication Adjust T2 and T3 for maximum indication on meter. As a gain check, input should be less than 4µV for an. output 0.5 vdc above noise. Adjust Tl and Ant Coil L103 for maximum indication on meter. Keep dc output level below 1 volt by reducing input as peak is approached. Adjust (first) AM OSC TRIM, (then) AM ANT TRIM for maximum indication on meter. Keep dc output level below 1 volt by reducing input as peak is approached.

2

AM at 600 kHz

AM EXTERNAL ANT. and GND.

Oscilloscope and dc VTM at TP-2, terminal 2 of Al.

3

AM at 1400 kHz

Same as Step 2, above.

Same as Step 2, above.

4

Repeat steps 2 and 3, above until all outputs are peaked at the proper frequencies. As a gain check, 600 kHz input should be less than 3OµV for output of 0.5 vdc above noise, and 1400 kHz input should be less than 35µV for output of 0.5 vdc above noise.

TABLE II - FM ALIGNMENT CHART (See Figure 7) Set FM MUTE Switch to OUT (button out), and Selector Switch to FM (button in). Generator Signal Input Point Indicator & Connection Adjustment and indication

Check color code (paint dot) on ceramic filters FL1 and FL2 (figure 2) to determine IF center frequency. Frequency for each color is: Green (10.60), Black (10.65), Blue (10.67), Red (10.70). Orange (10.73), White (10.75), Yellow (10.80). Both filters in any one receiver must have same colored dots. 2 FM at 98 MHz 98 MHz ±300 kHz sweep deviation at 400 Hz modulation. Generator output level approx. 2OµV. 1 0 4 M H z ± 5 kHz 7 sweep deviation at 400 Hz modulation. Generator output level approx. lOµV. 90 MHz µ 5 kHz sweep 7 deviation at 400 Hz modulation Generator output level approx. 1OµV. FM 300 ohm anterminals tenna dummy through antenna (see figgure 6) Same as Step 2, above Oscilloscope at TP-6, terminal 6 of Al. Adjust T4 and FM IF XFMR (in tuner) for max gain with good symmetry. Adjust T5 for optimum "S" curve. Check tracking. If necessary, adjust FM OSC TRIM, FM RF TRIM and FM ANT TRIM for max gain. Check tracking. If necessary, adjust FM OSC COIL, FM RF COIL and FM ANT COIL for max gain. FM OSC COIL is adjusted by carefully compressing turns closer together with an insulated instrument.

3

FM at 104 MHz

Tuning Meter

4

FM at 90 MHz

Same as Step 2,

Tuning Meter

NOTE: Repeat steps 3 and 4 as required to obtain satisfactory tracking at both frequencies. FM MUTING CHECK 5 FM at 98 MHz 98 MHz ±75 kHz sweep deviation at 400 Hz. Generator output level 20µV. Same as Step 5, above. Same as Step 2, above ac VTVM and scope a t T P - 8 , terminal 8 of Al. Same as Step 5, above. Record ac output level on VTVM

6

Same as Step 5, above.

Same as Step 2, above.

Depress FM MUTE switch. Reading at TP-8 should drop about 3 db. If required, adjust MUTE ADJ (R90) for proper reading.

L

6