[Elecraft] question for psk users

[Joe Subich, W4TV]

On 5/2/2012 1:07 PM, David Moes wrote:
 > You are assuming that everyone has the luxury of narrow roofing
 > filters and can filter out the week and reject unwanted strong
 > signals.  most PSK stations are not blessed with a K3 and are not able
 > to suppress strong signals. before I had a K3 2.4 was the narrowes I
 > could do.   most afordable rigs today still stop at 3khz (FT950) and
 > some even wider.

That's not true.  Every rig manufactured today provides a CW filter
option that works very well for reducing/controlling the AGC blocking
issue.  The FT-950 provides selectivity down to 500 Hz in its "PKT"
modes as do many other "affordable" rigs.

73,

    ... Joe, W4TV


On 5/2/2012 1:07 PM, David Moes wrote:
> You are assuming that everyone has the luxury of narrow roofing
> filters and can filter out the week and reject unwanted strong
> signals.  most PSK stations are not blessed with a K3 and are not able
> to suppress strong signals. before I had a K3 2.4 was the narrowes I
> could do.   most afordable rigs today still stop at 3khz (FT950) and
> some even wider.  You should use as little power as possible to
> conduct your QSO.   where I come from that is the law.   using high
> power to conduct a PSK31 qso is rarely necessary.  most other PSK
> users are running less than 30 W and if you can hear them you probably
> don't need 100+ watts to talk back.    I agree that it is needed in
> some cases but one should only shout when you need to and talk normal
> or even whisper if you can.
>
>
>
> David Moes
> VE3DVY
>
>>
>> The reason why a strong signal will "annihilate all the other PSK
>> signals" is that most users are trying to receive an entire 2.5kHz
>> bandwidth in one gulp. This means that even one strong signal within
>> that bandwidth will activate the AGC and drive all the other signals
>> down.
>>
>> Regrettably most PSK users don't understand what is happening, so they
>> have to rationalize it into simpler terms like "It's a crime to be
>> loud."
>
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