Omni VI Plus Model 564

• eHam
• Reviews are also available on the ARRL Members Only Web site

• Archived Ten-Tec Web Page
• Archived Ten-Tec Web Page - Filter Selection Help
• Option 1, 2, & 3 Upgrades - 563 / 564 Differences
• Omni 6+ Wiki - plenty of info and mods
• Discussion Thread on v1.02 vs v1.03 firmware

• to key sidetone only without RF, push ST followed by CW. To exit, push ST again
• Omni 6+ CW Keying Improvement Discussion
• Eliminating Audio Clicks in Fast QSK
• Close-Up of Manual p3 with filter installation info
• Removal of Low Pass Filter Board
• Mod to use Omni 6+ with non Ten-Tec QSK Amplifiers
• Homebrew 301 Remote Encoder by KG5U
• Using 302R Remote Encoder with Omni 6
• Omni VI+ Serial Port Test
• CW Practice Keying
• Aux Antenna Comments by W4PA
• Omni VI Option 3 Upgrade vs Omni VI Plus
• Increase VOX Response with Heil Mic Mod
• Correction to Manual on Adjusting Transmit Bias
• Using WWV to Calibrate
• CW Keying Improvement
• Varying Keyer Speed Fix
• Replacing Meter Lamps
• Setting the Clock
• Clock Fix
• Source for Omni VI/VI+ Crystal Oven
• TCXO Information
• Inrad Roofing Filter Mod - Switchable In/Out
• Intermittent VFO Possible Fix
• Erratic RX Fix
• PLL/Synthesizer Troubleshoot
• PLL/VCO Alignment
• Replacement Speaker
• Finding and Fixing Mic / Audio Hum
• Sticky Tuning Encoder
• Audio Level Spread Mod
• Keyer Control Mod
• S-meter Troubleshooting
• Logic Board IC suppliers
• 40M disappears after one hour repair advice
• PA0FRI Omni VI Mod Page
• Logic Board connectors 34/41 - conn plug 34 is displaced toward connector 41 leaving the extra (open) header pin toward the rear
• Model 563/564 Wiring Diagram by 4Z5UN

Omni VI+ Sales Brochure

The Omni VI+ was sold from 1997 till February 2002, with last production in August 2001.

• Modes: USB, LSB, FSK or AFSK, FM
• Frequency Range: All ham bands 160 through 10 meters. Twelve 500 KHz segments with 30 KHz overshoot at upper and lower band edges.
• Display: 7 digit to 10 Hz resolution, 0.56" LED, 2 secondary 0.3" displays for clock, memory channel and offset.
• Frequency Control: LO generated with a crystal oscillator mixed with a low noise 4.97 - 5.53 MHz phase locked loop.
• Dual VFO's with SPLIT mode.
• Offset Tuning: +/- 9.99 KHz receive and transmit,
• Memories: 100 duplex memories, one scratch pad memory, battery back-up (2 - 3 year life).
• PC Interface: Serial port operation of receive and transmit. Includes two line and RS-232 interface. Runs at 1200, 2400, 4800, 9600, or 19200 baud.
• Frequency Accuracy: +/- 50 Hz @ 25 degrees C.
• Antenna: 50 ohm unbalanced.
• Remote Band Switching: Selects antenna or other station accessories.
• Power Required: 2 A receive, 20 A transmit @ 12-15 VDC.
• Construction: 20 epoxy glass PC boards, most field replaceable. Extruded aluminum front panel, aluminum chassis, texture painted top & bottom, snap up stainless steel bail.
• Dimensions: HWD 5.75" x 14.75" x 17" - 14.6 x 37.5 x 43.2 cm.
• Weight: 16 lbs - 7.25 kg.

• RF Output: 0 - 100 watts, ALC stablilized.
• DC Input: Maximum 250 watts @ 14VDC. 100% duty cycle for up to 20 minutes. Continuous duty with customer supplied air cooling of rear panel heat sink.
• Microphone Input: 200 - 50K ohms, accepts microphones with 5 mV (-62dB) output. Polarizing voltage provided for electrets.
• Speech Processor: Adjustable compression level.
• T/R Switching: PTT or VOX on SSB, switchable FAST or SLOW QSK on CW, delay on SLOW is adjustable.
• Iambic Keyer: Adjustable 10 - 60 WPM, type A or B, weight adjustable from keypad.
• CW Offset: Programmable 400 - 990 Hz, DSP generated, sidetone automatically matches offset, volume adjustable independent of AF gain control.
• FSK Shift: 170 Hz.
• FM Deviation: +/- 5 KHz.
• Metering: Switchable to forward power, SWR, collector current or audio processing level on SSB.
• SSB Generation: Balanced modulator followed by 9 MHz, 8 pole crystal ladder filter.
• Carrier Suppression: 60 dB typical.
• Unwanted Sideband Suppression:60 dB typical at 1.5 KHz tone.
• Third Order Intermod:30 dB below two tone at 100 watts PEP.
• Spurious Output: Better than 45 dB below peak power output.

• Sensitivity: 0.16 uV for 10 dB signal to noise ratio at 2.4 KHz bandwidth. In FM, 0.35 uV for 12 dB SINAD at 15 KHz bandwidth.
• Selectivity: Standard 16 pole filter, 20 to 24 poles cascaded depending on options selected:

• Dynamic Range: 97 dB @ 2.4 kHz bandwidth at 20 KHz spacing, 100 dB+ with CW filters.
• Third Order Intercept: +10 dBm
• Noise Floor: -133 dBm @ 2.4 kHz bandwidth.
• Phase Noise: -122 dBc @ 1 kHz, -138dBc @ 20 KHz.
• S-Meter: Calibrated to 50 uV at S9.
• Attenuator: -20 dB.
• Passband Tuning: +/- 1.5 kHz.
• I-F Frequencies: 1st I-F 9 MHz, 2nd I-F 6.3 MHz, 2nd I-F for FM 455 kHz.
• Noise Blanker: adjustable threshold.
• DSP Noise Reduction: auto-correlation type algorithm. Broadband noise reduction of 5 to 15 dB is typical depending on conditions.
• Automatic DSP Notch Filter: Eliminates multiple heterodynes, notch depth automatically selected for each.
• Manual Notch Filter: 250 Hz to 2.5 kHz, greater than 50 dB.
• Receive Recovery Time: less than 20 ms, including split mode.
• Squelch Sensitivity: Less than 0.6 uV
• Image Rejection: >90 dB.
• Audio: 1.5 watts @ 4 ohms with less than 2% distortion, built-in speaker, separate fixed output 1 mw @ 600 ohms.
• Separate RX Antenna Input: 50 ohm phono jack, front panel selectable.