Identifying the Omni D series A, B or C
Omni A series A
The Omni A series A has an analog dial. Band coverage is 160, 80, 40, 30 (receive only), 20, 15 and 10. There is an AUX position on the band switch to add 12 meter receive and transmit (available after WARC bands became available). 30 meter transmit could be added after WARC bands became available*. The Omni A Series A can not be made to receive or transmit on 17 meters. The Omni A series A has a 4 position audio filter and squelch, no notch filter or crystal filters.
Omni D series A
The Omni D series A has digital frequency readout, otherwise is identical to the Omni A Series A.
Omni A series B
The Omni A series B has an analog dial. Band coverage is the same as the Omni A series A. The Omni A series B can not be made to transmit or receive on 17 meters. The Omni A series B has a rotary switch to cascade the 3 audio filters with 3 crystal filters. 2.4 KHz crystal filter is standard; 1.8 KHz and 500 Hz filters are optional. Omni A series B has a notch filter no squelch.
Omni D series B has digital frequency readout, otherwise identical to Omni A series B.
Note: A modification kit was available to modify the Omni A series A and Omni D series A transceivers to series B configuration. A front panel overlay that covered the filter and squelch controls was included in the modification.
Omni D series C
The Omni D series C has digital frequency readout. Band coverage: 160, 80, 40, 30, 20, 17, 15, 12 and 10 meter bands. Note: Omni D series Cs were shipped without WARC band crystals until WARC bands became available**. Omni D series C has a 3 position flip switch to select audio filters and a 3 position flip switch to select optional crystal filters. 2.4 KHz crystal filter is standard; 1.8 KHz and 500 Hz crystal filters are optional. Omni D series C has a notch filter, no squelch.
Parts are no longer available to make these modifications
Crystals are available from Ten-Tec Service
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