Ramsey Electronics FR146 - User Manual

2 METER FM
RECEIVER KIT
Ramsey Electronics Model No. FR146
Keep an ear on the local repeater action from your easy chair
with this simple and fun to build FM receiver. Tune the entire 2
Meter band or the VHF high Police and Fire band.
• Tunes any 5 MHz portion of the 136 to 175 MHz band.
• Excellent performance, less than 1 uV sensitivity.
• Tuned input, low noise preamp stage.
• True Dual-conversion superhet design with 2 pole
Ceramic High IF and 6 pole Ceramic low IF filters!
• Front Panel Volume, Squelch, and Tuning controls.
• Excellent receiver for weather band, police, fire, etc.
• Informative manual answers questions on theory, hook-
ups, and uses - enhances resale value, too!
• Add our case set for a finished ‘Pro’ look. Cases match
all Ramsey products.
• Clear, concise assembly instruction carefully guides
you to a finished kit that works the FIRST time!

Summary

FR146 CIRCUIT DESCRIPTION

PARTS LIST

FR146 PARTS LAYOUT DIAGRAM

RAMSEY Learn-As-You-Build KIT ASSEMBLY

RAMSEY Learn-As-You-Build KIT ASSEMBLY

Overview of the kit assembly strategy and general installation steps.

FURTHER COMPONENT INSTALLATION

ΑΝΤΕΝNA INPUT AND TUNED RF PREAMPLIFIER

Installation of antenna input and RF preamplifier components.

SA602 OSCILLATOR-MIXER and VARACTOR TUNING

Installation of SA602 IC and associated tuning components.

TRANSISTOR COUPLING & AFC CIRCUITS

MC3359 FM IC AND ASSOCIATED COMPONENTS

FINAL CONNECTIONS: THE LM386 AUDIO IC STAGE

TESTING, ALIGNMENT AND ADJUSTMENT

ALIGNMENT PROCEDURE

Step-by-step guide for receiver alignment and tuning.

RECEIVER SENSITIVITY

ADDING AN LED POWER ON INDICATOR

ENCLOSURE OPTIONS

RAMSEY CASE, KNOB & HARDWARE OPTION

Details on the official Ramsey case, knob, and hardware kit.

OTHER ENCLOSURE RECOMMENDATIONS

Suggestions for alternative enclosure types like VHS boxes or metal cabinets.

FR146 TROUBLESHOOTING HINTS

NOTES FOR ADVANCED USERS

The Ramsey Kit Warranty

Ramsey Electronics FR146 Specifications

General

Brand	Ramsey Electronics
Model	FR146
Category	Radio
Language	English