[time-nuts] Active antennas for a Thunderbolt...

[Brooke Clarke]

Hi Chuck:

See:
http://www.prc68.com/I/ThunderBolt.shtml#Ant

Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html

Chuck Harris wrote:
> Ok, I'm getting a little puzzled.  I have a TB that came from one of
> the early groups sold by John Ackermann and TVB as part of the TAPR buy.
> It works nicely, but like all TB's, it is deaf as a post, and needs a
> high gain antenna.... When I first got the TB, I tried it with a Motorola
> hockey puck antenna, with about 17db gain, and if it is outside in the
> clear, it works nicely... but LH shows the satellites signals are all
> down in the mud.
>
> ...So...
>
> I bought the active antenna that the TB data sheet said belonged with
> the TB, a 24045-10 bullet antenna, and *NO* satellites are visible..
> the antenna is dead.
>
> I'm no stranger to getting cheated on things I buy, so I chalked it up
> to bad luck, and put my Motorola hockey puck antenna back on my TB.
>
> ...Then....
>
> A couple of days ago another active antenna became available, a
> Micro Pulse 1934NW/C 50db antenna from a DATUM INC GPSDO.  I checked
> its data sheet, and it powers off of +5V @ 38ma, so I bought it,
> hooked it up to my TB, and again *NO* satellites are visible... the
> antenna is dead.
>
> I put a "T" in the line, and the voltage heading up to the antenna is
> around +4.5V... The spec sheet says it will work down to +3V.
>
> Am I doing something wrong here?  Or am I just unlucky?
>
> -Chuck Harris
>
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