[TenTec] Omni V power limits

[Gary Hoffman]

Yes, it is a very good point !

This is why I qualified my post on this subject to say "and only on RTTY."

When running PSK I never go above maybe 25 watts or so.

But then...it is a highly efficient transmission mode with an inherently 
high signal to noise ratio.

Gary

----- Original Message ----- 
From: "Dr. Gerald N. Johnson" <geraldj at weather.net>
To: <tentec at contesting.com>
Sent: Thursday, July 01, 2010 11:50 PM
Subject: Re: [TenTec] Omni V power limits


> Very good point.
>
> 73, Jerry, K0CQ
>
> On 7/1/2010 3:50 PM, CSM(r) Gary Huber wrote:
>> Even if you have a clean, low distortion signal, while using an 
>> amplifier,
>> you need to keep the output to 50W or so to avoid causing AGC compression 
>> in
>> the receivers of the other stations  in the PSK-31 sub-band. Don't forget
>> that in PSK-31, many stations are simultaneously using a single 2500 Hz 
>> SSB
>> bandwidth with a recommended output of 30W.  When there are QRO signals 
>> in
>> the waterfall, the receiver AGC typically causes the weaker signals to be
>> less likely to be decoded as their audio will be reduced..... its fairly
>> easy to figure out which signal in the waterfall is causing the other
>> signals to be compressed but its difficult to politely convey to the
>> perpetrator the damage being caused. Few DX-peditions want to offer 
>> PSK-31
>> contacts for the very reason that many operators will not abide by the
>> self-imposed low power necessary to share a PSK-31 sub-band.
>>
>>
> _______________________________________________
> TenTec mailing list
> TenTec at contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>