25 watts peak or average power?
----- Original Message -----
From: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
To: <tentec@contesting.com>
Sent: Saturday, June 02, 2007 9:20 AM
Subject: Re: [TenTec] Jupiter - duty cycle for digital modes
> On Sat, 2007-06-02 at 09:42 -0400, KB8LFA wrote:
>> Greetings!
>>
>> I purchased a Jupiter from Ten-Tec yesterday. It has not yet arrived but
>> I already have a question, hi hi. I enjoy PSK31 and Hellschriber digital
>> modes. Can the Jupiter run these modes at full power? In the past, I
>> have always had to turn my radios down to 25-30 watts.
>>
>> Thanks and 73,
>>
>> Jeremy - KB8LFA
>>
> Part of the reason for running low power with PSK31 is for improved
> intermod performance. And the mode is effective at lower power according
> to many reports.
>
> Hellschriber has a duty cycle for a single tone much like CW so probably
> could run at full power.
>
> But running modes with a 2 KW PA where most users are running 25 watts
> will make you an alligator and you will get many responses to your CQs
> that will be far too weak to copy. Indeed you may have pile ups but too
> weak to copy. Couple years ago at FD early morning on 75 meters I had to
> give up calling strong signals because they were home stations running
> PAs that attracted a flock of callers all too weak to be heard at the
> home station. Alligators in quantity. Not communicating.
> --
> 73, Jerry, K0CQ,
> All content copyright Dr. Gerald N. Johnson, electrical engineer
>
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