[TenTec] Yaesu FT9000 oversights in QST review

[Steve Baron - KB3MM]

Which book is that?

----- Original Message ----- 
From: "Zivney, Terry L." <00tlzivney at bsu.edu>
To: <tentec at contesting.com>
Sent: Wednesday, July 06, 2005 18:55
Subject: [TenTec] Yaesu FT9000 oversights in QST review


> 
> 
>  
> 
> I noticed two other points not editorially mentioned in the QST review
> of the latest Click-meister
> 
> rig.
> 
>  
> 
> Figure 5 in that review shows very sharp rise and fall times; although
> the text says that menu settings
> 
> exist to minimize clicks, surely the  approximately 1ms rise times shown
> in the figure would produce
> 
> monumental FT1k type clicks.
> 
>  
> 
> Secondly, Figure 6 shows a horrendous transmit noise floor; close in
> noise is 20 dB higher than
> 
> the Orion measured by the League.  That translates to 20dB excess
> interference caused to innocent
> 
> nearby listeners.
> 
>  
> 
> OTOH, putting an attenuator in front of the Orion, or any other
> well-designed radio, will not improve
> 
> the two tone dynamic range; it raises the MDS and the third order
> intercept point by the same
> 
> amount. The attenuator merely moves the spurious free "window" around.
> For further information
> 
> on this point, see the Leagues' classic book by DeMaw and Haywood.
> 
>  
> 
> Terry Zivney, N4TZ/9
> 
>  
> 
>  
> 
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