[time-nuts] eBay GPS antenna.
ewkehren at AOL.com
Wed Feb 7 08:56:41 EST 2018
Please keep us informed I bought onBert Kehren
Sent from my Galaxy Tab® A
-------- Original message --------From: John Green <wpxs472 at gmail.com> Date: 2/6/18 4:03 PM (GMT-05:00) To: time-nuts at febo.com Subject: Re: [time-nuts] eBay GPS antenna.
I kind of have to believe the specs. The two survey grade antennas I
already have, a Leica and a Trimble, both have regulators in the preamp
sections. The Leica has an 8 volt one and the Trimble has a 5 volt one. I
intend to hook it up to a variable supply and watch the current as I
increase voltage. If it has a regulator, the current should stabilize at an
input voltage just above what the internal preamp operates at. If not, it
should continue to rise. I am tempted to pry it apart, even if it risks
damage just so I can see for myself what they are using for the preamp
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