[hpsdr] QSD gain and noise.

[Philip Covington]

On 9/27/07, Ramakrishnan Muthukrishnan <vu3rdd at gmail.com> wrote:
> On 9/27/07, Philip Covington <p.covington at gmail.com> wrote:
> >
> > I think the 20 dB increase in NF for the F5K has been misquoted.
> > Before now, the only data point we had was from screen captures of
> > your beta F5k which shows approx 10 dB increase in NF from 14 to 50
> > MHz.  You also indicated that considerable hand tuning of the circuit
> > was done to improve the QSD from beta units to the production units.
> >
> > Any which way it shows the QSD can be improved (judging from the
> > considerable improvement between the SDR-1000 and the F5K) and more
> > work needs to be done.
>
> Is there any schematic available for F5K ? I could find only the SDR1K
> schematics on the Flex website. Just curious to know what is under the
> hood.
>
> Ramakrishnan, VU3RDD
>

I don't think even F4K paid customers have access to schematics yet,
and while FR$ may make schematics available to paid customers some day
in the future, I would not expect to be able to easily get your hands
on a schematic if you have not purchased a radio.

Phil N8VB

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
***Disclaimer***
This email contains my personal opinion* however incorrect or mistaken,
and should not be construed as "ill will" towards any person or
manufacturer.
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

 1190898109.0