[time-nuts] Oncore, Trimble Antennae

Chuck Harris cfharris at erols.com
Wed Oct 22 04:31:41 UTC 2008

Tom Van Baak wrote:
>> Both the Trimble and Motorola modules use active antennae with 5V power 
>> - what I don't know is whether they are the same polarity.
>> all my trimbles and oncores have +5 on center, ground on shield...
> I'd be interested to know if any antennas are in fact the other
> way around. Never even considered that.

It would have been fairly trivial for them to put a bridge rectifier
before the amplifier's power stuff, allowing for either polarity.

I always try to do that kind of thing (when I can) in my designs...
I wonder if they did?

-Chuck Harris

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