[hpsdr] Spreadsheet Mercury

[Phil Harman]

Hi David,

Looks like a nice part.  At the moment we are looking at using two cascaded, 
and individually switchable,  SBF-4089

http://www.sirenza.com/documents/products/2858/SBF-4089(Z)_Green_Datasheet.pdf

which has a slightly higher spec than the Gali-74.

73's Phil...VK6APH




----- Original Message ----- 
From: "David Holman" <aikidave20 at yahoo.com>
To: <hpsdr at hpsdr.org>
Sent: Friday, March 09, 2007 10:34 AM
Subject: Re: [hpsdr] Spreadsheet Mercury


> ***** High Performance Software Defined Radio Discussion List *****
>
> A preamp that I have used in the past is the Gali-74
> from MiniCircuits,
> http://minicircuits.com/pdfs/GALI-74+.pdf.
>
> Take a look.
>
> David, KE3HF
>
>
> --- Henry Vredegoor <henry.vredegoor at gmail.com> wrote:
>
>> ***** High Performance Software Defined Radio
>> Discussion List *****
>>
>> > Hi Phil and Phil,
>>
>> While reading the WiKi page about Mercury, a
>> reference was made to a
>> spreadsheet, but could not be inserted in the
>> wikipage it seems:
>>
>> >>
>>
>> .....A front end amplifier with a gain of 15 dB and
>> a 3 dB noise figure will
>> give a final noise figure of 10.3 dB at 30 MHz. (See
>> spreadsheet [link here
>> when I learn how to do it! VK6APH ]).......
>>
>> <<
>>
>> Is this available to the public? [  .....Me ?   ;-)
>>  ]
>>
>> I tried to understand and follow the calculations on
>> this page and was
>> trying to make my own spreadsheet, but I am not sure
>> if I am right and would
>> like to verify my calculations.
>>
>> Further I would like to mention a small error /
>> annoyance on the page:
>>
>> I see a number of question marks [?] on the page
>> where I think there should
>> be minus [-] signs?
>> This makes following the calculations not easier
>> also ......  ;-)
>>
>> I tried several settings of character codings in IE
>> but there was no change.
>> ??
>>
>> 73's
>>
>> Henry.
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