[TenTec] In praise of older technology AM transmitwith TenTecrigs

Bob McGraw - K4TAX RMcGraw at Blomand.net
Tue Feb 25 22:25:15 EST 2014


It's easy, sell the Omni VI and buy an Omni VII.  Much better in all 
aspects.  Or if that's too many "George Washington's", then go for an Eagle 
with the 6 KHz filter for less $$.  Even has a better receiver and great 
audio for both TX and RX.

73
Bob, K4TAX


----- Original Message ----- 
From: "Brian Carling" <bcarling at cfl.rr.com>
To: "R. Eric Sluder-W9WLW" <resluder at yahoo.com>; "Discussion of Ten-Tec 
Equipment" <tentec at contesting.com>
Sent: Tuesday, February 25, 2014 9:21 PM
Subject: Re: [TenTec] In praise of older technology AM transmitwith 
TenTecrigs


> Now if they just had a way to do AM on my Omni VI but that would be a huge 
> stretch !!
>
> Best regards - Bry Carling
>
>
>
>> On Feb 25, 2014, at 9:00 PM, "R. Eric Sluder-W9WLW" <resluder at yahoo.com> 
>> wrote:
>>
>> If this of any help, this is from the Ten-Tec website and found in the 
>> knowledge base:
>>
>> Tuning instructions for AM Operation with the Onmi VII
>>
>> Return to knowledge
>> base
>>    1. Set the power output to the desired level. Key the transceiver with 
>> the
>> microphone and the DSP will automatically set the
>> carrier to the proper level (this will initially take a few seconds). 
>> Peak
>> output of an AM transmitter is 4 times the level of the carrier, thus if 
>> the
>> power output is set for 100 watts, the carrier will be 25 watts, power 
>> output is
>> set for 50 watts then the carrier will be 12.5 watts etc…
>>    2. Speak into the microphone and adjust the microphone gain until the 
>> ALC LED flickers on voice peaks. If
>> the microphone gain is adjusted beyond the point where the ALC LED 
>> flickers on voice peaks, then
>> distortion can occur. It will be helpful to monitor the audio with the 
>> monitor
>> or an external receiver
>>    3. Adjust the transmit roll off and transmit equalizer using the 
>> monitor or an
>> external receiver for the most pleasing transmit audio. The microphone 
>> gain
>> might have to be readjusted for ALC after these controls
>> are set. Bandwidth is automatically set by the DSP. The
>> speech processor is not active on AM
>>
>> Eric
>> W9WLW
>>
>>
>>
>>> ________________________________
>>> From: Bob McGraw - K4TAX <RMcGraw at Blomand.net>
>>> To: Discussion of Ten-Tec Equipment <tentec at contesting.com>
>>> Sent: Tuesday, February 25, 2014 4:49 PM
>>> Subject: Re: [TenTec] In praise of older technology AM transmit with 
>>> TenTecrigs
>>>
>>>
>>> While I haven't measured it in some time,  I seem to recall the info 
>>> that
>>> Barry stated is correct for the AM mode.
>>>
>>> 73
>>> Bob, K4TAX
>>>
>>>
>>> ----- Original Message ----- 
>>> From: "Barry N1EU" <barry.n1eu at gmail.com>
>>> To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
>>> Sent: Tuesday, February 25, 2014 2:37 PM
>>> Subject: Re: [TenTec] In praise of older technology AM transmit with
>>> TenTecrigs
>>>
>>>
>>>> I might be wrong, but I believe the AM tx bw is fixed (3KHz audio,
>>>> 6KHz wide am signal) and the bw and roll off controls are ignored in
>>>> AM.
>>>>
>>>> 73, Barry N1EU
>>>>
>>>>> On Tue, Feb 25, 2014 at 8:03 PM, GARY HUBER <glhuber at msn.com> wrote:
>>>>> A TenTec 705 microphone into the OMNI-VII with the TX ROLL OFF set to 
>>>>> 150
>>>>> Hz
>>>>> and TX BW set
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