[time-nuts] Thunderbolt antenna

George Dubovsky n4ua.va at gmail.com
Sun Mar 10 16:45:06 UTC 2013


> It seems, just go with quad shield RG-6 and be done with it.  I even have
> part of a spool of that laying around.  Maybe more of an issue is how do
> you properly connect a TNC to that stuff (the antenna has a TNC).
>
> Peter


Here is one solution:

<
http://www.showmecables.com/Category/F-Connectors-Adapters.aspx?q=&pg=1&ps=25&fq={attr_display2_sm:TNC%20to%20F}&fq={attr_display2_sm:F%20to%20TNC}<http://www.showmecables.com/Category/F-Connectors-Adapters.aspx?q=&pg=1&ps=25&fq=%7Battr_display2_sm:TNC%20to%20F%7D&fq=%7Battr_display2_sm:F%20to%20TNC%7D>
>

73,

geo - n4ua

>
>
>
>
> On 3/10/2013 11:01 AM, Volker Esper wrote:
>
>>
>> Hi Peter,
>>
>> Why not. The antenna is optimized for that purpose (receiving GPS L1),
>> omnidirectional and tuned to the GPS frequency, snow skids down, birds
>> can't land on it. As N0UU affirms, there's nothing further sensational
>> inside.
>>
>> I don't know, how proficient you are with radio frequency stuff, but a
>> gain of 35dB does not guarantee a good reception. You primarily need gain
>> to compensate (cable) losses. The noise figure (NF), for example, can get
>> much more important.
>>
>> What antenna do you use at the time? If you are using a magnetic car roof
>> antenna a Trimble Bullet surely will be a better choice...
>>
>> There are lots of GPS antennas on ebay for even less than 30 Dollars. I
>> run four different antennas, which I purchased from ebay and none of them
>> has failed so far.
>>
>> Volker
>>
>>
>>
>>
>>
>>
>> Am 10.03.2013 06:07, schrieb Peter Gottlieb:
>>
>>> I'd like to get a better antenna for my Thunderbolt.
>>>
>>> I see Trimble bullet antennas type 57860-00 on ebay for $30 or so, specs
>>> look to be 5 volt 35 dB gain.
>>>
>>> Would something like this be a good choice?
>>>
>>> Peter
>>>
>>>
>>>
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