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Yeticom OPTIMA MK2 | Radioaficion Ham Radio

Yeticom OPTIMA MK2

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OPTIMA MK2

24.500 – 29.999 Mhz  50W All Mode HF Mobile Transceiver
(January 2012 production)

The following paragraph outlines the changes made to the radio for the January 2012 production.

1. Step Function. The step function default is 5khz. The radio will default to 5khz when the radio is powered on. On previous models the radio would only hold the step function chosen until another function was engaged (ie press the PTT) upon which the radio would revert to 5khz step function. From the 2012 MK2 release onwards the step function chosen by the step button 1, will remain until either changed by the step function or the radios is powered off, when the step will revert to 5khz.The choice of 1khz, 5khz, 10khz, and 100khz is retained.

2. Mic Gain. The mic gain circuits have been increased a further 10db for 2012 to allow for stronger FM audio and allow greater control of user supplied microphones. In SSB the best audio with supplied microphone will be about 50% or 12 O'clock. More may cause overmodulation and a decrease in SSB audio quality.

3. Function Switch. The function switch has been removed from the clarifier and is now located on VFO  frequency selector control. This was to allow users to activate the function control without disturbing the clarifier position.

Yeticom OPTIMA MK2

GENERAL SPECIFICATIONS

Frequency Coverage:.............24.500 to 29.999 Mhz  Dual Band
Antenna Impedance:..............50 ohm, unbalanced
Frequency Control:..........Digital Phase-Lock Loop (PLL) Synthesizer
Frequency Accuracy:.......Better than +10 ppm from 0 - 40 °C after 15 min. warm up
Power Requirement:..............12 -13.8 V DC, negative ground
Current Consumption:.................9 amps maximum
Dimensions:...................6 x 2 x 9.5 in (W x H x D)
Weight:..........................2.9 Ibs

TRANSMITTER SPECIFICATIONS
Power Output:

  • SSB/ FM...50 Watts,
  • AM..15 Watts RMS / 50 Watts PEP


Tuning Steps:.....1 kHz /5Khz/10 kHz /100 kHz/1Mhz   5khz default step on power up
Final Transistors:...........IRF520 MOSFET (x2)
Spurious Emissions:...........More than 50 dB below peak output power
Carrier Suppression:............More than 40 dB below peak output power
Unwanted Sideband:...........More than 50 dB below peak output (1 kHz tone)
FM Deviation:..........................+/- 5 kHz maximum
Audio Response......................More than 30dB below peak output
Frequency Response:.............400 to 2800 Hz
Microphone Impedance:...........ECM, 600 to 1 K ohms

RECEIVER SPECIFICATIONS
Circuit Type:...............Dual-Conversion Super-heterodyne
Intermediate Frequencies:

  • 1st IF/SSB IF...10.695 MHz
  • 2nd IF...455 kHz

Sensitivity:

  • SSB...0.25 V at 10 dB S + N/N
  • AM...1.0 V at10dBS+N/N
  • FM...0.3 V at12dBSINAD

Selectivity:

  • SSB...4.2 kHz (-6 dB) / 8.5 kHz (-60 dB)
  • AM / FM...6.0 kHz (-6 dB) /18 kHz (-60 dB)

Clarifier Range:..........................+/-1.5 kHz
Adjacent Channel Rejection:..............Better than 70 dB
I F Rejection:.............................Better than 85 dB for all frequencies
Frequency Response:.................250 to 3000 Hz
Audio Output Power:...................2 watts minimum at 10% THD with an 8 ohm load
Audio Output Impedance:..........8 ohms

  • Dual Finals on Heat Sink with temp controlled fan
  • Modes AM, FM, USB, LSB
  • Microprocessor Controlled
  • 5 memories memory scan as well as band scan
  • Last Channel Recall
  • Frequency Scan in any step (1khz/5khz/10khz/100khz)
  • Variable RF Output Power all modes
  • Variable Mic Gain
  • Repeater offset...1khz-999khz +/- offset all bands all modes
  • 5 Digit LCD Frequency Display
  • Scanning Microphone step in 1/5/10/100khz steps
  • Night Illuminated Display white led
  • Surface Mount Technology throughout

Dimensions:.................................2(H) x 6(W) x 9.5(D) in

New and exclusive to yeticomnz.com is the yeticom optima. Fully redesigned and improved on  with new coverage ..cooling...steps....filter stages...rf final stage shielding...designed by New Zealanders and made in China to meet the demands of the modern day ham radio operator .

Firstly the frequency coverage. This is available in four different configurations:

  • 1:: New Zealand 40 cb radio channels only. No spilt offset   26.330-26.770 inclusive  channel or freq display
  • 2::USA/Australian 40 cb radio channels only. No spilt offset    26.965-27.405 inclusive  channel or freq display
  • 3:: 12 meter and 10 meter bands only (24.500-25.000/28.000-29.999 split available  frequency display only (default coverage)
  • 4:: 24.500-29.999 split available frequency display only (export mode)


Full use of the repeater spilt function is available on all bands (12/10meter or export modes only) at any time  unlike pervious versions.

We have added a extra frequency tuning step  the radio now defaults to 5khz stepping on power up to move around the bands faster of course  stepping in 1/5/10/100khz steps can still be changed at any time. also we have redesigned the software so stepping  has flow stepping just like the more expensive rigs...no more need of going back into the "function/call" to step up into the next band. like we said no gaps no jumps.

The transceiver has extra shielding in the rf driver/final stages added to comply with international regulations and type approval

Fm mode now has per and de-emphasis in the audio chain for far better fm mode operation for the European market

The receive has a new design to remove imaging problems pervious models had. Also we had had the manufactor improve the if filter and if filter stages for lower if noise ..another thing pervious models suffered from.

Extra cooling has been provided for the hotter climates ..the cooling is provided by a temperature controlled fan on the heat sink.

The mother board is a completely new design

Mk II Version changes function and filter have now been moved to the vfo control (press for function ..press for 3 sec for filter on /off toggle)

a few changes to the decal on the front of the transceiver to indicate new functions such as memory scan and mic socket orientation (8 pin) as well  as the call button also labeled "Mhz" for band selection.

OPTIMA MkII OPERATING MANUAL DOWNLOAD

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