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Old March 31st 06, 08:39 PM posted to rec.radio.amateur.homebrew
Paul Keinanen
 
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Default mixer: DBM or dual gate mosfet?

On 28 Mar 2006 12:36:21 -0800, "Giancarlo Gian Moda, I7SWX"
wrote:


Ah..OK CSSE ... I sold a PDP11/10 with a card reader from CSS to the
Italian Goverment as a donation to a University in Peru'...the highest
PDP11 installation on the world at that time...hi


By the way, did you have to install extra fans to compensate for the
low air density (and thus lower heat carrying capacity) at high
altitudes ?

Some electronic systems have quite low maximum altitude ratings due to
this. The low air density might also cause problems for amateur radio
equipment if operated at full power at high altitudes.

Paul OH3LWR