[TenTec] Omni VI question

[Bob McGraw - K4TAX]

Also, I would mention that the new Omni VII will also turns down to about 3 
watts or so.  No mods required.

Since both the Omni VI Plus and the Omni VII have separate RX inputs, I use 
a 20 dB attenuator between the output of the radio and the input of the 
transverter.  This allows the radio to operate at about 15 watts and gets 
about 150 mW into the transverter.  Also, should I forget and wack it with 
full power, the transverter doesn't get fried.  My 20 dB attenuator is a PI 
configuration using a 50 ohm 25 watt load for the input R, a 51 ohm 1/2 watt 
R for the output value and a 200 ohm 1/2 watts R for the series element 
between the input and output.  Now these values don't make for an exact 50 
ohm input but neither the radio nor the transverter seem to care.  The loss 
is about 20 dB which is all that counts.  I use a separate RX line from the 
transverter to the AUX RX input.

Also should note that my transverters are DownEast Microwave units that only 
require about 100 mW to 150 mW of drive for full output.

73
Bob, K4TAX

----- Original Message ----- 
From: "Bob McGraw - K4TAX" <RMcGraw at Blomand.net>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Sent: Friday, October 05, 2007 11:03 PM
Subject: Re: [TenTec] Omni VI question


> My Omni VI Plus just turned down to 5 watts using the RF Level control.
>
> 73
> Bob, K4TAX
>
>
> ----- Original Message ----- 
> From: <K5XS at aol.com>
> To: <tentec at contesting.com>
> Sent: Friday, October 05, 2007 10:25 AM
> Subject: Re: [TenTec] Omni VI question
>
>
>>
>> Steve,
>>   I seem to recall (traded my Omni VI+ for an Orion II this  year) and my
>> log-book records working with as little as three watts just  cranking 
>> down
>> the
>> "Power" control (ganged with the "Mic" microphone gain knob,  bottom
>> left).  I
>> did no mods to the radio; it came that way from the  factory.
>> 73,
>> Bernie K5XS
>>
>>
>> In a message dated 10/5/2007 10:15:05 A.M. Central Daylight Time,
>> wa9jml at tbc.net writes:
>>
>> Is there  a way to reduce the TX power output of the Omni VI or VI+ to 5
>> watts?
>> My  Omni V has this mod done to it, and I am thinking of getting another
>> radio
>> to act as the IF for my Elecraft transverters.  Right now, I am  using my
>> Argonaut II but would like to free that up for portable and QRP
>> operating.
>>
>> TNX,
>>
>> Steve WA9JML
>>
>>
>>
>>
>>
>>
>>
>>
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>
>
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