INSTALLATION OPERATION AND MAINTENANCE SILTRONIX MODEL 1011D SILTRONIX 330 VIA EL CENTRO OCEANSIDE, CALIFORNIA 92054 April 1976 Reprinted 2006
NOTICE The Siltronix Model 1011D Transceiver is designed and constructed using the finest of available components. To insure its long service life perforated material has been used in construction of the cabinet to provide a continuous, large volume flow of cooling air. No other equipment should be placed on top of the Model 1011D as it may interfere with this airflow and affect component life. Page 2 Copyright 2006 Robert A.
INTRODUCTION The Siltronix Model 1011D Single Sideband Transceiver is designed to be used in SSB or AM modes in the 10-meter amateur radio band. In addition the 1011D is also a tunable receiver in the CB band. Power input exceeds 300 watts P.E.P. on single sideband and 60 watts on AM. The Model 1011D includes automatic gain control (AGC) and automatic level control (ALC). The internal AC power supply permits fixed station or portable operation wherever 117 volts. 50-60 Hertz is available.
SPECIFICATIONS (continued) REAR PANEL CONTROLS AND CONNECTIONS P.A. BIAS Potentiometer, HEADPHONES Jack, Fuse Holder, Antenna Connector, Jones Plug Power Connector, S-Meter Zero Potentiometer, Two Accessory AC outlets, VFO Output (For FD-1011), and external relay connection (+12VDC on Transmit). OTHER CONTROLS AND CONNECTIONS Carrier Balance Control accessible bottom cover.
INSTALLATION GENERAL The installation of the Siltronix 1011D is not at all difficult, and it involves only the placement of the transceiver in its operational area (fixed or mobile), connection of power (either 117 volts AC, or 12 volts DC), and the connection to an antenna. The following paragraphs are, therefore, devoted to the installation requirements involving microphones, fixed and mobile operation, and recommended antenna types.
FIGURE 1. MOBILE MOUNTING ON TRANSMISSION HUMP Page 6 Copyright 2006 Robert A.
DC CONVERTER, MODEL 14A For 12-14 volt DC operation in mobile installations, it will be necessary to use the Siltronix 14A Converter. The Model 14A D.C. Converter attaches to the rear of the Model 1011D transceiver and converts it to 12-14 volts D.C. input. The 14A D.C. Converter is for normal negative ground systems. Two No. 6 sheet metal screws must be used to attach the 14A firmly to the transceiver. The Model 14A is conservatively designed for long reliable service with a minimum failure rate.
HEADPHONE JACK A standard 1/4 inch diameter headphone plug will mate with the rear panel mounted headphone jack. A closed circuit jack is used which will disconnect the speaker when the headphone plug is inserted. Headphones with an impedance of 600 ohms or less should be used. ACCESSORY POWER RECEPTACLES Two rear panel mounted power receptacles provide 117VAC for accessory equipment only when the unit is powered from an AC source. The one labeled “1I7VAC SW.
OPERATION The following pages contain instructions on operation of the 1011D including descriptions of all front and rear panel controls and their functions, preliminary checks, transmitter tune-up adjustments and receiver operation in the various modes. CONTROL FUNCTIONS, FRONT PANEL S-METER / METER SWITCH The meter has four functions that are controlled by the position of the Meter Switch: 1) S-Meter: (Switch in S-Meter position). Meter indicates relative strength of received signal.
CONTROL FUNCTIONS, FRONT PANEL (Continued) SPOT SWITCH Used in AM Receive only while tuning in a station. This allows the operator to hear the carrier of an incoming AM station. ANL SWITCH Automatic Noise Limiter Switch. Reduces ignition and atmospheric static at the output of the receiver. MIC JACK A three conductor plug fits into this jack. Always use a high impedance microphone with the 1011D, (Siltronix CM1011, Shure 444, etc).
1011D PRELIMINARY CHECKS AND ADJUSTMENTS 1) 2) Locate the P.A. compartment and remove the packing material from the P.A. tube if not previously accomplished. (This requires removal of cabinet cover). Set all front panel controls and switches as follows: a) A.F. Gain Control fully counterclockwise (A.C. Power off in this position). b) Mode Switch to USB. c) R.F. Gain Control fully clockwise. d) Band Switch to 28.5 XCV position. e) Dial setting 28.7 MHz. f) ANL Switch OFF. g) Spot Switch OFF.
4) 5) 6) Release P. A. Cathode / S-Meter switch and again push Tune / Rec switch down. Quickly peak P.A. Tune Control for maximum reading on meter. (Meter is now reading relative power output). Release switch. Once again, push Tune Rec switch down and quickly peak PA. Load to maximum meter reading. Release switch. Push Tune / Rec switch down and re peak the P.A. Tune Control. Release switch.
TRANSMITTING SINGLE SIDEBAND The transmitter frequency will be the same as the received signal frequency as indicated by the position of the main tuning dial, or to any frequency to which the dial is set. If the frequency for transmission is to be the same frequency as the received signal, or on a clear frequency, the transmitter should be tuned per the Transmitter Tuning Procedure on page 11. If it has been tuned up previously, only minor adjustments will be required on a new frequency.
CIRCUIT THEORY GENERAL DISCUSSION The Siltronix 1011D transceiver provides single sideband, suppressed carrier transceive operation, and generates the single sideband signal by means of a crystal lattice filter. To permit a logical discussion of this mode of operation, certain definitions are necessary. In a normal AM signal (double sideband with carrier) a radio frequency signal is modulated with an audio frequency signal.
FIGURE 3. BLOCK DIAGRAM, TRANSMIT MODE. FIGURE 4. BLOCK DIAGRAM, RECEIVE MODE. The signal from the VFO Amplifier is initiated in the transistorized VFO/Buffer circuit comprised of Q1 and Q2. The signal from the VFO is routed to the VFO Amplifier and is mixed with the single sideband from the IF amplifier, resulting in output in the 10 meter band.
V5, where they are amplified and then applied to the control grid of the Receiver Mixer, V6. The local oscillator signal from the VFO Amplifier is then heterodyned with the received signal to produce the IF Frequency. All IF amplification is accomplished at this frequency, nominally 5500.0 KHz, through IF amplifiers V7 and V8. In the Product Detector, V9A, the IF signal is heterodyned with the carrier frequency generated by Carrier Oscillator, Q3.
ALIGNMENT AND TROUBLESHOOTING The alignment procedures presented in this section are routine touch-up procedures for all tuned circuits and other adjustments. It is recommended that the procedures be performed in the order presented. However, if complete realignment is not required (as may be the case when just one tube is replaced), perform just those procedures required. Refer to Figures 6 and 7 for component placement.
d) e) f) g) Adjust the First I.F. coil, L701, for maximum RF output. Adjust both slugs of the balanced modulator transformer, T1301, for maximum RF output. Increase the output of the audio generator until the wattmeter reads 40 watts. Reset the audio generator to 200 Hertz and adjust the USB carrier oscillator trimmer, C1503, for a reading of 10 watts. Switch the Mode Selector to the LSB position. Adjust the LSB carrier oscillator trimmer, C1501, for a reading of 10 watts.
FIGURE 6. SILTRONIX MODEL 1011D, TOP VIEW. Page 19 Copyright 2006 Robert A.
FIGURE 7. SILTRONIX MODEL 1011D, BOTTOM VIEW. Page 20 Copyright 2006 Robert A.
TABLE 1. VOLTAGE AND RESISTANCE MEASUREMENTS. Voltage measurements were taken using a HEWLETT PACKARD Model 410C/B VTVM. Resistance measurements were taken using a SIMPSON Model 260 Volt-Ohm meter. Refer to other conditions for measurements on page 18. TUBE TYPE R =Rec. T =Trans. Socket Pin Numbers 1 R Volts T Volts Ohms 0 0 852 0 0 0 0 0 0 4 12.6AC 12.6AC 0 V2 12BE6 Trans. Mixer R Volts T Volts Ohms -2.5 -2.5 l00K 0 0 0 0 0 0 12.6AC l2.6AC 0 212 195 >50K -2.5 105 25K 0 -10.
TABLE 2. TROUBLESHOOTING GUIDE. Defect Possible Cause PA Idling Current Unstable 1. Defective Power Amplifier Tube (V4). 2. Defective BIAS control and/or associated components. 3. Defective bias power supply. Inability to Load per Operating Instructions 1. Antenna not resonant at operating frequency. 2. Defective transmission line. 3. Defective antenna loading coil(s). 4. Tubes V1 through V4 defective Insufficient Sideband Suppression 1. Carrier Oscillator (Q3) operating on incorrect frequency. 2.
PARTS LIST CAPACITORS Unless otherwise specified, capacitors are listed in picofarads with a whole number and in microfarads with a decimal number. C101 C102 C103 C105 C106 C107 C110 C111 C112 C202 C203 C201 C205 C206 C207 C2A C2B C302 C303 C301 C305 C401 C402 C403 C404 C405 C406 C407 C408 C409 C410 C501 C502 C503 C601 C602 C603 C701 C702 C703 C704 C705 C706 C801 C802 C803 C804 C805 C806 C901 C902 C903 C904 C905 0.01 , + 80, -20°/o, 500V Disc 0.002. 20%, 1KV Disc 27 pf Disc. 15 pf Disc. 5 pf Disc.
CAPACITORS (Continued) C906 C907 C1705 C1706 C1707 C1708 C1709 C1710 C1711 0.002, 20%, 1KV Disc 40 mfd., 350V 0.0047, 1KV 0.0047, 1KV 150 mfd., 150V 100 mfd., 350V 100 mfd., 350V 0.002, 20%, 1KV Disc 0.01, +80, -20%, 500V Disc C1702 C1703 C1712A C1712B C1712C C1712D C1713 C1714 100 mfd., 35V 0.01 , + 80, -20%, 500V Disc 80 mfd., 400V 80 mfd., 100V 5 mfd., 400V 5 mfd., 400V 150 mfd., 150V 150 mfd.
RESISTORS All resistors are 1/2 watt 10% tolerance unless otherwise specified. R101 R102 R103 R104 R201 R202 R204 R205 R206 R207 R301 R302 R303 R304 R401 R402 R403 R404 R405 R406 R407 R408 R501 R502 R503 R504 R505 R506 R507 R601 R701 R702 R703 R704 R705 R706 R707 R708 82 Ohm 47K Ohm 10K Ohm, 2W 56 Ohm 27K Ohm 100K Ohm 10K Ohm 2W 470K Ohm 2.7K Ohm 100K Ohm 100K Ohm 100K Ohm 10 Ohm 100 Ohm 100 Ohm 25K Ohm Bias Pot 4.7K Ohm 1K Ohm 3 Ohm, 5W 100 Ohm, 5W 2.
TRANSFORMERS T1101 T1301 T1701 A.F. Output Transformer 5500 KHz Bal. Mod. Transformer Power Transformer TUBES V1 V2 V3 V4 V5 V6 V7 V8 V9 V10 V11 V13 V14 12BA6 12BE6 6GK6 8950 6CB6A 12BE6 12BA6 12BA6 12AX7 6AV6 6GW8 6JH8 12AX7 VFO Amp Trans. Mixer Driver Power Amp Rec. RF Amp Rec. Mixer First IF Amp Second IF Amp Product Detector / Rec. Audio AGC / ALC Amp AF Output Bal. Mod. Trans. AF / Mic Amp CRYSTALS Y1501 Y1502 5500 KHz. 5504.6 KHz Carrier Osc. Carrier Osc. Page 26 Copyright 2006 Robert A.
FIGURE 8. SCHEMATIC DIAGRAM, MODEL 14A POWER SUPPLY. Page 27 Copyright 2006 Robert A.
LIMITED WARRANTY POLICY SILTRONIX warrants this equipment against defects in material or workmanship, except for tubes and solid-state devices, under normal service for a period of six (6) months from original purchase date. Tubes and solid-state devices are warranted for a period of ninety days (90) days. This warranty is valid only if the enclosed warranty registration card is properly completed and mailed to the factory within ten (10) days of purchase date.
