After using various TenTec radios for more than 30 years, I consider the
Ten-Tec ALC to be an Automatic output LIMIT Control; that is, one may use the
ALC to set the output limit from 5 Watts to 100 Watts, with the Mic Gain or
Drive used to achieve output to the Limit set by the ALC.
In the case of PSK-31, I set the ALC so that the transmit signal could go to
100 Watts but limit it to 30 Watts with the Drive (MIC gain) when driven by the
sound card output of 50% or less. In this case the ALC light never goes on
during PSK-31 transmissions.
73,
Gary - AB9M
--------------------------------------------------
From: "F8EHJ" <f8ehj@free.fr>
Sent: Wednesday, August 19, 2009 11:21 AM
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Subject: [TenTec] ALC - How does it work ?
> Hello,
>
> After reading jupiter documentation and some posts on the mailing
> list, I don't understand how does ALC indicator work ?
> In CW mode : ALC is lighting with dot or dash transmit.
> In SSB mode : ALC is blinking with voice peak, the MIC gain shall be
> adjusted for this.
> PSK31 : ALC LED must not be lighted.
>
> I noticed sometimes that (in SSB mode) ALC LED didn't light even if
> Mic Gain was at maximum. For ALC blinking, I shall decrease output
> power from 100 to 92 %.
> I noticed this case when SWR was about 1.6 , 1.7
>
> Why ?
>
> Thanks for your help.
>
> Best 73's
>
> Herve F8EHJ
>
>
>
>
>
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>
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