On Fri, 04 Aug 2006 22:14:39 GMT, ".Blueskies."
wrote:


wrote in message ...
: On Fri, 04 Aug 2006 09:37:44 -0400, Jonathan Goodish
: wrote:
:
: In article .com,
: "Jay Honeck" wrote:
: http://www.scn.org/~bk269/gps.html
:
: This is an interesting site that explains why some pilots (seemingly
: mostly running Garmin-brand portable GPS units) are having trouble with
: losing satellite lock.
:
:
: We had a problem in our PA28 with a Skymap II (panel mounted GPS) when
: using an antenna on the top of the instrument panel. The culprit was
: the Narco IDME 825 and depended which frequency the DME was tuned. The
: DME transmitter blocked the GPS receiver. There was a considerable
: improvement when we fitted an external roof antenna. We have now
: fitted a Skymap IIIc GPS which is understand has a better receiver
: and so far appears ok.


Didn't know DME transmitted...


Yes it does as nicely explained by Jon.
I should have pur IDME 891 (not 825) and it transmitts with 25 watts.