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Re: [TenTec] In praise of older technology AM transmit with TenTecrigs

To: "R. Eric Sluder-W9WLW" <resluder@yahoo.com>, Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] In praise of older technology AM transmit with TenTecrigs
From: Brian Carling <bcarling@cfl.rr.com>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Tue, 25 Feb 2014 22:21:23 -0500
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
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@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@Blomand.net>
>> To: Discussion of Ten-Tec Equipment <tentec@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@gmail.com>
>> To: "Discussion of Ten-Tec Equipment" <tentec@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@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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