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Last modified 2022-02-05

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Hy-Gain VIII (3078)

A picture of Hy-Gain VIII (3078)


Type:Citizen band transceiver
Frequency range:26.965-27.255 MHz
Channels / tuning steps:23
Mode:AM / SSB
Frequency control:XTAL-matrix
Frequency stability:?%
Clarifier or Delta tune:600 Hz "Fine tune"
Power supply:Mains: 120 or 230 VAC, reconfigurable (2-pin connector)
or 13.8 VDC (3-pin connector)
Current drain / power consumption:RX: Less than 600 mA @ 13.8 VDC
TX: ? A
Antenna impedance / connector:50 ohm / SO-239
Dimensions (W*H*D):400*120*289 mm (15.75*4.72*11.38")
Weight:5.8 Kg (12.79 lb)
Other features:PA. ANL/NB. SWR-meter. Digital clock.

Receiver system: Single conversion superheterodyne
IF: 11.27 MHz
Sensitivity: AM: 1 uV (10 dB S+N/N)
SSB: 0.25 uV (10 dB S+N/N)
Selectivity: AM: 2.4 KHz (-6 dB)?
SSB: 2.4 KHz (-6 dB)
Image rejection:40 dB
AF output power / speaker:3 W at ?% distortion / ? ohm
External speaker connector:None

RF output power: AM: 4 W
SSB: 12 W (PEP)
Modulation system:SSB: Balanced ring modulator with crystal lattice filer
FM deviation (Factory set):No FM
Spurious emissions:Better than -50 dB
Microphone impedance / connector:? ohm / 5-pin DIN (180)
Microphone input level:? mV

Manufactured:Japan (Assembled in Puerto Rico), 1976-1977 (Discontinued)
Main PCB: Early: PTBM035BOX by Cybernet Electronics Corporation
Later?: PTBM035COX by Cybernet Electronics Corporation
Sub PCBs: PTLD006COX - Clock LED display board
PTLD007COX - Channel LED display board
PTMX007COX - Matrix board
PTPW006COX - Power supply board
PTSW008COX - Clock switch board
PTSW009COX - Function switch board
PTSW010COX - Switch board
PTSY009COX - Synthesizer/oscillator/channel selector board
PTZZ008COX - Clock control board
PTSR003DOX - SWR board
Additional info:
Related documents: Service manual 23 MB)
AF amplifier: Two 2SD325
RF driver: 2SC1306
RF final: 2SC1307
Sams Photofact #:CB-136 (August 1977)
Modifications and fixes:
Options / Accessories:
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A rear picture of Hy-Gain VIII (3078)