If the radio is the CL4790-1000 it is rated to -40C. For short term exposure to
cold, have you considered a small thermal blanket? It is drawing 5 watts from
the battery and power output is one watt. So, you have 4 watts of heat. Possibly
enough for a small thermal blanket.

Antenna should not require any heating element.



wrote:

Yes, I did think of temperature concerns. The radio unit itself should
be kept at above freezing if my calculations are correct. However,
does the antenna need to be kept warm?

Owen Duffy wrote:

On Fri, 28 Jul 2006 22:29:51 GMT, Owen Duffy wrote:



sending an experimental balloon to over 100,000 ft. I have purchased
two 900MHz RF Aerocomm ConnexLink Radios. The radios have a power of
1000 m.a., which states it will transmit and receive up to 20 miles
line of sight. I do realize that this is probably under ideal

I did mean to comment on the temperature spec for the radio. The
temperature in the troposhere can be as low at -50 to -75 deg C, will
the radio get cold enough in transit to fail (eg battery failure,
condensation etc).

Owen
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