Empathy List Archives

JG

John Green

Tue, Feb 6, 2018 9:03 PM

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
stages.

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 stages.

BK

Bob kb8tq

Wed, Feb 7, 2018 2:32 AM

Hi

If you spend some “quality time” with the pictures in the listing, the antenna
is indeed labeled “operating voltage 3.3 to 18V”. Yes, I find that a bit incredible.
If there is nonsense being generated, it’s not by the person listing the antenna
on eBay. My guess would be that the automotive world has pushed some odd
semiconductor outfit to tool up a regulator that does what’s needed.

Bob

On Feb 6, 2018, at 4:03 PM, John Green wpxs472@gmail.com wrote:

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
stages.

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To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Hi If you spend some “quality time” with the pictures in the listing, the antenna is indeed labeled “operating voltage 3.3 to 18V”. Yes, I find that a bit incredible. If there is nonsense being generated, it’s not by the person listing the antenna on eBay. My guess would be that the automotive world has pushed some odd semiconductor outfit to tool up a regulator that does what’s needed. Bob > On Feb 6, 2018, at 4:03 PM, John Green <wpxs472@gmail.com> wrote: > > 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 > stages. > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there.

E

ewkehren

Wed, Feb 7, 2018 1:56 PM

Please keep us informed I bought onBert Kehren

Sent from my Galaxy Tab® A
-------- Original message --------From: John Green wpxs472@gmail.com Date: 2/6/18 4:03 PM (GMT-05:00) To: time-nuts@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
stages.

time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Please keep us informed I bought onBert Kehren Sent from my Galaxy Tab® A -------- Original message --------From: John Green <wpxs472@gmail.com> Date: 2/6/18 4:03 PM (GMT-05:00) To: time-nuts@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 stages. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

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Re: [time-nuts] eBay GPS antenna.