[hpsdr] Alex alternative

[Eduardo Jacob]

Hello

I wonder if somebody has thought about using HEROS SCR Preselector. 
Although it's more expensive unit it has the advantage of being an 
enclosed standalone unit that can be used with other radios and it 
can be controlled by a PC (which is needed anyway)

Eduardo/EA2BAJ

PD: Brichure is in 
http://www.herostechnology.co.uk/pdf/SCR_Preselector_Brochure_v12.0b.pdf?file=preselectorbrochure

At 01:23 11/02/2009, you wrote:
>***** High Performance Software Defined Radio Discussion List *****
>
>
>
>Hi Gordon,
>
>Have a look at the Mercury document on the Wiki since this answers 
>your question.
>
>In summary it depends on your local situation ( how many strong 
>local signals are there) and what natural selectivity your antenna 
>system provides.
>
>Many users find no external filtering is required but it depends on 
>individual configurations and circumstances.
>
>It's a different story in Europe given the massive strength of the 
>SW stations there - I've seen 0dBm at the antenna socket before!
>
>Generally if the ADC Overload indicator is not lit then you are not 
>going to see any improvements by adding a front end filter.
>
>If you are going to use Penny to drive a linear amplifier, and it 
>does not provide any LPFs of its own e.g. Pennywhisle, then you will 
>need the Alex LPFs or something similar.
>
>73's Phil...VK6APH
>
>
>Quoting Gordon & Lois Duff <glduff at bellsouth.net>:
>
>>***** High Performance Software Defined Radio Discussion List *****
>>
>
>
>
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