[hpsdr] Mounting Hermes

[Kjell Karlsen]

Hi Frank.

When Hermes PCB was constructed, it was designed to be installed both  
ways. For use with Apollo in the Hammond enclosure (1455Q1601) Apollo is  
mounted on the bottom for cooling of the PA transistors and Hermes is  
installed on top with the components facing up. The interface cables are  
connected to the bottom of Hermes (TX out, RX in, Power in and SPI).

For use with Abhi´s 15 W PA, Hermes is installed on top with the  
components facing down. There are provisions for interface connectors on  
the component side of Hermes for this use. Remember that the SPI connector  
on top is different from the SPI on bottom (imaged)!

For better cooling of the ADC, I am using a small Heat Sink (Fisher PN:  
ICK SMD E 15 SA or equivalent) fastened to the top of the ADC using dual  
sided heat transfer tape or glue. This seems to be sufficient for cooling  
even with 7 receivers running. I hope Phil can confirm this?

73, Kjell







På Wed, 15 Aug 2012 23:56:47 +0200, skrev FRANCIS CARCIA  
<carcia at sbcglobal.net>:

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