[time-nuts] GPS Antenna - was receivers in the same box.

[SAIDJACK at aol.com]

Guys,
 
on this subject, we put together and qualified a convenient  and complete 
(fairly) low-cost timing-compatible GPS antenna kit that  includes all the 
mounting materials, 150 feet of cable, all the connectors, and  down to the 
last screw, nut, and bolt everything one would need to mount  the antenna. 
Only standard tools are required for the installation.
 
Compatible to any L1 GPS receiver, works from 2.5V to 5V. We get up  to 
52dB C/No with 150 feet of cable on our uBlox GPS receivers with  this antenna, 
and the antenna cable length can be easily extended with  F-connectors on 
both sides.
 
This was done because so many people had problems getting all the parts to  
put an antenna together and called us for pointers to antenna kits (which 
we  could not find), and we went out and bought all the different pieces 
needed to  do so and put these together as a kit.
 
Check out the _www.jackson-labs.com_ (http://www.jackson-labs.com)  website 
if  interested. 10% Time-Nuts discount (one unit per person) - $241.20 per 
kit w/o  the lightning arrestor. A bit more pricey when the antenna 
lightning surge  protector is included which is mandatory for any outdoor 
installation. I know  this is more than what you would pay for a used antenna on Ebay, 
but we are  not really making any money on this, we are pretty much selling 
it as a  convenience to our customers. Please contact us off-this-list if  
interested.
 
bye,
Said
 
 
In a message dated 2/5/2014 09:46:27 Pacific Standard Time,  
n1hac at dartmouth.edu writes:

As has  been discussed before, a splitter intended for home satellite 
systems is a  cheap solution as they have the bandwidth and the DC pass 
required.   I have one between a couple of Thunderbolts.  It powers the 
antenna  and shows antenna OK on both.  Using a splitter is better than 
just a  T as it does lend some isolation between the  receivers.

David


On 2/4/14 4:50 PM, mike cook  wrote:
>
>
> Le 4 févr. 2014 à 22:35, Volker Esper a écrit  :
>
>>  
http://www.ebay.de/itm/HP-58516A-GPS-1-4-signal-Distribution-Amplifier-Splitter-N-type-/300997787447?pt=US_Ham_Radio_Receivers&hash=item4614ddbf37
>>
>   I think I should have said that my box is only 25mm high. So any  
splitter will have to be less. A Mini Circuits splitter will just about do it  , 
but I would prefer a smaller  solution.
>
>
>>
>> Am 04.02.2014 14:08, schrieb  mike cook:
>>> Hi,
>>>   Till now I have  been putting receivers in individual boxes. So to 
limit the growing number of  boxes, I want to put two Resolution-T SMT 
receivers in one box, sharing power  and antenna inputs. My question is " How best 
can I share the antenna input,  minimizing any interference between the 
receivers?" . Will any interference  matter? For example, I can easily connect 
three bits of shielded coax in a "Y"  , but will probably get reflections 
from each receiver. As the cables will  only be about 15cm long, would it 
matter? How about the DC antenna supply? The  antenna DC will NOT be powering an 
antenna as it passes through a DC blocked  splitter used to share an antenna 
between most of my receivers. I might be  able squeeze a Mini-Circuits 
splitter in the box and DC-block both outputs but  that may be overkill.  What 
discrete circuitry might be a replacement?  Will the "Y" do it?
>>>
>>> Someone must have already  succeeded with this type of config.
>>>
>>> Thanks in  advance  for your input.
>>>
>>>  Regards,
>>> Mike
>>>
>>>
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