Re: [amsat-bb] Transystems Modifications

[Art Goldman <aegoldm@xxxxxxxxxxxx>]

Pieter:

Your work looks excellent. Where did you obtain the Murata
filter (part#, cost, etc.)?

Art, N3OY


Pieter Ibelings wrote:
> 
> Hi Guys,
> 
> Yesterday I modified a Transystems downconverter by bypassing the input
> filter and installing a Murata 2.4 GHz filter at the second filter location.
> The results are really really good. The noise is lower and the selectivity
> is also greatly improved. The old filter configuration let the image in
> which would add 3 dB of noise to the converter. A picture of the
> modification is below:
> 
> http://www.ozoni.com/n4ip/tsmod.jpg
> 
> Other pictures at :
> 
> http://www.ozoni.com/n4ip
> 
> Now I am in the process of replacing the LO by a 282MHz TCXO x 8 multiplier.
> 
> This thing will outperform my other homebrew converter if I am not careful
> :)
> 
> 73's
> 
> Pieter N4IP
> 
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