Note
QST, Dec 1976, p. 143.
QST, Feb 1977, p. 131.
QST, Apr 1979, p. 174. ("Close out" )
QST, Jan 1980, p. 106. ("Close out" )
The Hy-Gain 3806 2 meter FM transceiver is an self contained which provides the safety and convenience of VHF communications in one compact unit. It operates from 144–148 MHz and is ideal for mobile or fixed short distance communications.
The transceiver will perform reliably in all weather conditions. It is crystal controlled in both receiver and transmitter. Crystals are supplied for channels .52/.52. The 3806 will operate from AA cells, 12 VDC external power source, or an optional Nicad power pack .
Features
– Double-conversion superheterodyne receiver employing MOSFETs in both the mixer and RF amplifier stages.
– Metering & Indicators: Includes a front-panel red transmit LED indicator along with an analog meter that displays relative signal strength on receive and battery condition on transmit.
– Antenna: Supplied with a telescoping frac14-wave whip antenna, with an optional "rubber duckie" flexible antenna available.
– Jacks & Connectors: Front-facing controls and weather-protected jacks for an earphone, external power, and external antenna.
– Built into a blue ABS plastic housing designed for high impact and shock resistance.
– Features gasketed body halves to prevent moisture ingress, a specially baffled speaker/microphone grille to keep out water, and a isolated, sealed battery compartment.
Specifications
– Channels: 6, crystals for 146.52T & 146.52R
– Output impedance: 50 ohms nominal
– Frequency range: 144.1sim148.0 MHz
– Circuit system: Crystal controlled, phase modulation 32pf parallel load capacity, HC-25 holder
– Nominal RF output: 1 watt (12VDC input)
– Frequency multiplication: 12 times
– Frequency stability: ± 10 x 10^6 from -20C to +50C ambient temperature (10 ~ 14 VDC)
– Max. frequency deviation: ± 5kHz (frequency modulation)
– TX audio frequency response: Within +1dB and -3dB of true 6dB per octave, pre-emphasis from 300Hz~3000Hz
– Minimum signal/noise ratio: At least 35dB below 3.3kHz deviation at 1kHz
– Modulation sensitivity: Adjustable sound pressure level mic pre-amp
– Receiver: Crystal-controlled, double conversion superheterodyne: 32pf parallel load capacity, HC-25 holder
– 1st local oscillator frequency stability: ± 10 times 10^-6 from -20C to 50C ambient temperature (10 ~ 14 VDC)
– Sensitivity:
20dB noise quieting: Less than 0.5 uv (closed circuit method)
12dB SINAD: Less than 0.4 uv for 12dB SINAD
– Modulation acceptance: More than 7kHz (EIA)
– Selectivity: More than 70dB @ 20kHz (20dB quieting method)
– Spurious and image response: 60dB below rated sensitivity
– Squelch sensitivity: Noise compensated type: 0.3 uv threshold, below 2 uv with full squelch
– Adjacent channel selectivity: 2 signal generator method: 65dB @ 25kHz
– Intermodulation: 55dB (EIA SINAD, 3 generator method)
– Audio frequency response: Within +2dB and -8dB of true 6dB per octave, de-emphasis from 300Hz~3000Hz
– Audio output power: 1/2 watt @ less than 10% distortion
Power requirement: 12 VDC
Power source: 8 AA penlight cells or optional Nicad power pack
– Current drain:
– Transmit: approx. 380mA @ 12VDC
– Receiver: Max. audio output 100mA@12VDC
– Stand-by: Squelch on, 20mA @ 12 VDC
