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1970s Columbian Hydrosonics Aqua-Guide CH-704 Marine Radio Direction Finder

Currency:CAD Category:Electronics / Vintage Electronics Start Price:10.00 CAD
1970s Columbian Hydrosonics Aqua-Guide CH-704 Marine Radio Direction Finder
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[?]Live Online Auction Starts In 2026 Oct 13 @ 10:00 (UTC-07:00 : PDT/MST)
Preview: October 10th (10am - 5pm)
Pick ups: October 14th - October 16th (10am - 5pm)

Preview and Pick up location: 27294 Fraser Hwy, Aldergrove, BC V4W 3P8

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Dating to the 1970s, this Columbian Hydrosonics Aqua-Guide model CH-704 is a portable, fully transistorized four-band marine receiver and radio direction finder. Its dial covers beacon, AM broadcast, marine, and VHF/FM frequencies; the three lower bands provide direction-finding capability, while VHF/FM is for reception. Navigation features include a rotating ferrite loop antenna beneath the upper housing, a 360-degree azimuth scale, telescoping sense and VHF antennas, and a null, tune, and battery meter. Controls include BFO/SSB, volume, DF/gain, band selection, automatic noise limiting, and radio/DF modes. The receiver operates from internal D-cell batteries or an external 12-volt DC supply. The rear label states that it was made in Japan for Columbian Hydrosonics of Freeport, New York.

Maker: Columbian Hydrosonics, Freeport, New York
Model: Aqua-Guide CH-704
Type: Four-band marine radio receiver and radio direction finder
Production period: 1970s
Frequency coverage: Beacon 0.15-0.40 MHz; broadcast 0.54-1.6 MHz; marine 1.6-5.0 MHz; VHF/FM 148-174 MHz
Power: Internal D-cell batteries or external 12 V DC
Country of manufacture: Japan
Condition: As pictured.