What to do if there is no sufficient injection from pin 7 V6 in Hallicrafters SR-150 Transceiver?
If the Hallicrafters Transceiver shows insufficient injection from pin 7 V6, verify pin 7 V6 for 25vpp of injection from carrier oscillator, and inspect V6 along with its related circuitry.
What to do if the injection level is too low at Bottom C64 in Hallicrafters Transceiver?
If the injection level is too low at the bottom of C64 in your Hallicrafters Transceiver, inspect the shielded wire, R91, and the grid circuit of V11.
How to troubleshoot low injection level at Pin 8 V11 on a Hallicrafters SR-150?
When the injection level is too low at Pin 8 V11 on your Hallicrafters Transceiver, check V11 and its associated circuitry.
General| Brand | Hallicrafters |
|---|---|
| Model | SR-150 |
| Category | Transceiver |
| Language | English |
Details on essential capacitor replacements and ESR ratings for the SR-150.
Information on problematic relays K2 and K3, and their maintenance.
Instructions to remove non-original modifications for proper configuration.
Recommendation to upgrade the SR-150 to production run 7 specifications.
Procedures for safely powering up the SR-150 for the first time.
Critical steps for aligning carrier, heterodyne, and VFO oscillators.
Steps to check and adjust the carrier oscillator frequency and output.
Guidance on checking and adjusting the heterodyne oscillator output and frequency.
Procedures for VFO correction, alignment, and drift testing.
Details on the RIT/CAL circuit and recommended modification.
Procedure to check the VFO corrector circuit for USB/LSB frequency offset.
Step-by-step guide for aligning the VFO frequency across bands.
Overview of receiver sensitivity specifications and testing.
Procedure for diagnosing and isolating receiver faults using signal injection.
List of necessary test equipment for receiver fault isolation.
Detailed steps for troubleshooting receiver issues.
Table outlining injection points, signals, and expected audio outputs.
Final checks for receiver AGC and RF gain pot functionality.
Procedures for testing the SR-150 transmitter.
List of equipment needed for transmitter testing.
Step-by-step guide for powering up and testing the transmitter.
Troubleshooting steps for transmitter drive faults.
Diagnosing and resolving issues related to transmitter bias voltage.
Details of factory modifications made to different production runs.
Instructions for modifying the transmitter to remove the 'click' sound.
Procedures for cleaning the SR-150 chassis, relays, and sockets.
Detailed steps for cleaning the transceiver chassis using bathroom cleaner.
Recommended tools and methods for cleaning tube sockets.
Guidance on cleaning air variable capacitors and their components.
Advice on choosing the correct microphone for the SR-150.
Procedures for testing and addressing VFO drift issues.
Method to test VFO frequency stability over time.
Description of a modification to stabilize the RIT/CAL circuit.
Explanation of RIT/CAL adjustment procedures for SR series rigs.
How to properly operate the SSB RIT function.
Explanation of RIT function in CW mode and tuning range issues.
Detailed information on the function and failure modes of relays K2 and K3.
Diagnosis and potential salvage of warped relay substrates.
Method for cleaning relay contacts using DeOxit.
Procedure for replacing original relays with non-standard parts.
Wiring diagram and pin assignments for relay K2.
Wiring diagram and pin assignments for relay K3.
Discussion and testing of the PA loading coil L32's behavior.
Suggestion for improving receiver sensitivity by changing tubes.
Troubleshooting a persistent low gain issue in the receiver front end.
Analysis of mic gain issues and audio oscillations in the SR-150.
Detailed procedure for neutralizing the PA final tubes.
Technical discussion on filter pass band and balanced modulator performance.
Data sheet for recording VFO frequency correction measurements.
Performance data tables for receiver sensitivity and AGC.
Performance data tables for transmitter output power and audio response.
General specifications including power requirements.
Details on AC input voltage and power supply requirements.
Specifications and test conditions for receiver performance.
Standard control settings to be used for receiver performance tests.
Specification for standard audio output power into a 3.2 ohm load.
Specification for antenna input impedance and audio output impedance.
Specifies the Hewlett-Packard Model HP-606A for measurements.
Specifies the use of unmodulated CW signals for testing.
Lists IF frequencies and tuning ranges for different bands.
Specifies required signal levels for 500mw audio output.
Specifies signal levels for achieving a 20 dB signal-to-noise ratio.
Limits the sensitivity change between upper and lower sideband reception.
Specifies rejection levels for image and spurious signals.
Defines the minimum rejection ratio for the first IF frequency.
Limits 'tweets' or 'birdies' to a low equivalent CW signal level.
Specifies the acceptable variation in audio output with increasing signal input.
Defines the signal levels required for an S-9 meter reading.
Specifies the range and direction for calibration adjustment controls.
Limits for dial calibration errors across bands and points.
Specifies the range and effect of the RIT control.
Limits for frequency drift after warm-up.
Specifications for hum level and audio distortion.
Specifications and test conditions for transmitter performance.
Standard control settings to be used for transmitter performance tests.
Specifies equipment for measuring RF output impedance and power.
Procedure for setting the final amplifier bias current.
Adjustments for neutralization and checks for self-oscillation.
Limits for carrier balance adjustment under various conditions.
Specifies the audio input level required for minimum SSB output.
Specifies output power limits for SSB operation across frequencies.
Specifies output power limits for CW operation across frequencies.
Defines the audio frequency response range for SSB.
Specifies the audio input level required to activate VOX.
Specifies the VOX sensitivity level for anti-trip function.
Describes the function of the VOX delay control.
Procedure for checking the output level meter and S meter.
Procedure for checking the Automatic Audio Level Control (AALC).
Specifies limits for spurious signals and harmonics.
Ensures all controls and outlets function properly.
Procedure for setting the crystal calibrator frequency.
Checks for mechanical stability and proper operation of controls.
Maximum allowable play for control knobs.
Requirement for smooth, non-binding control operation.
Requirement for positive detent action on rotary switches.
Check for perceptible wobble or vertical movement in the tuning dial.
Requirement for uniform dial and meter lighting.
Check for any indication of backlash in the VFO tuning.
Specification for VFO assembly bushing reaming.
Specification for reaming front panel shaft holes.
Procedure for lubricating and locking RF coil cores.
Lubrication procedures for VFO and chassis assemblies.
Specific lubrication instructions for the VFO assembly.
Specific lubrication instructions for the chassis assembly.
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