Ramsey Electronics HR-80 User Manual

HR-80• 1
80 METER (3.0 MHZ)
ALL MODE RECEIVER KIT
Ramsey Electronics Model No. HR-80
• Add our case and knob set for a finished ‘Pro’ look. Cases match all
Ramsey products.
Small in size but BIG in features:
• Easily tunes SSB, CW, RTTY and AM
• Smooth varactor tuning of any desired 250KHz segment of the 80 meter
band, easily retuned
• Uses the popular Signetics NE-602 IC chip for outstanding sensitivity and
efficient operation
• Front panel RF Gain, Tuning and Volume controls
• Efficient LM-386 Audio amplifier drives speaker or earphones with a clean,
crisp audio
• Informative manual answers questions on receivers, hookups and uses -
enhances resale value, too!
• Ideal companion to the Ramsey QRP-80 CW Transmitter
• Runs on a standard 9-volt battery
• Clear, concise assembly instructions lead you to a finished product that
works FIRST time!

Ramsey Electronics HR-80 Specifications

General

IF Rejection	>60 dB
Audio Output	1 Watt
Frequency Range	3.5-4.0 MHz
Modes	CW
Power	12 VDC
Selectivity	2.1 kHz @ -6dB
Power Supply	12 VDC

Summary

Introduction to the HR-80 Receiver

Ramsey HR-Series Receiver Overview

Understanding Direct Conversion Receivers

HR-80 Circuit Description and Components

HR-80 Kit Parts List

Assembly Strategy: Learn-As-You-Build

HR-80 Printed Circuit Board Layout

HR-80 Receiver Assembly Instructions

Initial Testing and Verification

HR-80 Receiver Alignment Procedure

Direct Conversion Receiver Alignment Tips

Provides advice for aligning direct conversion receivers, particularly regarding oscillator signals.

Operating Your HR-80 Receiver

HR-80 Troubleshooting Guide

Notes for Experienced QRP Builders

Alternate Power Source Options

Discusses operating voltage range and polarity considerations for the HR-80 receiver.

Bandspread and Tuning Range Adjustment

HR-80 Frequency Stability Considerations

Dial Calibration Methods

Direct Frequency Readout with Counters

LM386 Audio Amplifier Output

General Construction Notes

Ramsey Kit Warranty and Policies

Warranty: Defective Parts Procedure

Details the process for reporting and replacing defective parts within the warranty period.

Warranty: Missing Parts Reporting

Explains how to report missing parts and common issues like resistor value confusion.

Warranty: Factory Repair Services

Outlines the requirements and fees for factory repair services for assembled kits.

Warranty: Product Refund Policy

Specifies the return policy and conditions for obtaining a full refund within ten days.