Re: Topband: New High-Performance Beverage Pre-amp

[Peter Sears <w5ps@airmail.net>]

Rick, the 1dB compression spec is P1dB or Pout at 1dB gain compression. 
This is an output power spec not input power. So the input power at 
P1dB= +15dBm is -4dBm or 19dB less than the output power at 1dB gaiin 
compression. The linear gain is 20dB minus 1dB because the part is into 
1dB of gain compression that's how you get the 19dB.

Peter
W5PS

Rick Karlquist wrote:

> > logo of The Fish Lake  Beverage Preamp. Fellow topbanders are the target
> > users. The preamp is actually an  80/160 electronic bandswitching device
> > with state-of-the-art IM and noise  performance.
> >
> > We have placed the spec sheet and ordering information on Joe's website
> > for  those interested. Just go to the following URL and follow the
> > arrows:   www.booksandtubes.com.
>
> Is the IP3 spec referred to input or output?
> The 1 dB compression spec (+15 dBm) does not make sense in
> light of the 20 dB gain spec.  It implies that you can get
> +34 dBm out if you put +15 dBm in.  +34 dBm is 2.5 watts.
> Also, it would be useful to know the IP2 spec.
> Thanks,
>
> Rick N6RK
>
>
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