[hpsdr] Front End protection

[Christopher T. Day]

Cerberus - Latinized form, Kerberos - Greek form.

 

 

            Chris - AE6VK

 

 

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From: Jeroen Bastemeijer [mailto:J.Bastemeijer at TUDelft.nl] 
Sent: Thursday, February 22, 2007 3:14 AM
To: FRANCIS CARCIA
Cc: hpsdr at hpsdr.org
Subject: Re: [hpsdr] Front End protection

 

Hi Francis,

It wasn't a god, but a dog-like creature called Ceberus (if my memory
serves me well).

In my opninion a combination of resistors and diodes (to the power suply
lines) is the best solution. The resistors will limit the current and
provide some "soft clipping". By soft-clipping all sorts of distortion
generated by the receiver are avoided.

Regards, Jeroen PE1RGE

FRANCIS CARCIA wrote:



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I don't know which Greek God guarded the gate but how are we going to
protect this fast A/D from static and lightning transients? Racal used
an interesting active limiter ahead of the RA6830 because the older
RA6790 had real bad burnout problems with the FETs in the first mixer. I
would think we need more than a NE2 across the input.  Frank WA1GFZ

 



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-- 
Ing. Jeroen Bastemeijer
 
Delft University of Technology
Department of Electrical Engineering
Electronic Instrumentation Laboratory
Mekelweg 4, Room 13.090
2628 CD Delft
The Netherlands
 
Phone: +31.15.27.86542
Fax: +31.15.27.85755
E-mail: J.Bastemeijer at TUDelft.nl
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