[time-nuts] Antenna for T-bolt
Chuck Forsberg WA7KGX N2469R
caf at omen.com
Mon Apr 2 22:57:23 UTC 2012
The booster amps used for satellite dishes work on GPS as well.
I used one when I was feeding two Thunderbolts thru a splitter.
On 04/02/2012 03:28 PM, Bob Martin wrote:
> The Thunderbolt wants a higher gain antenna than most standard GPS receivers. I tried standard Garmin active antennas, and while they worked (I have a good view of the sky), signal levels could be better.
> Best match probably is something like the HP/Symmetricom 58532A antenna, which has gain> 30dB -- most "active" GPS antennas are in the 24 - 26 dB range.
> They're not cheap, but they'll do the job.
> If you have much distance to cover, feed line is of course important as well -- 9913, LMR 400, good quality RG6, something with low loss at 1.5 GHz.
> I'm using a 58532A feeding a Symmetricom 58535A active GPS splitter to run a Thunderbolt and a Datum Tymserve 2100. Feedline is 9913 to the splitter, and short LMR 195 SMA cables from there. (Yes you can find F to SMA adapters, on eBay, even though many will shudder at the concept...)
> 73 Bob K6RTM
> On Apr 2, 2012, at 15:01, time-nuts-request at febo.com wrote:
>> Message: 4
>> Date: Mon, 2 Apr 2012 17:39:40 -0400
>> From: "Bill Riches"<bill.riches at verizon.net>
>> To: "'Discussion of precise time and frequency measurement'"
>> <time-nuts at febo.com>
>> Subject: [time-nuts] Antenna for t-bolt
>> Message-ID:<01ac01cd1119$1c699af0$553cd0d0$@riches at verizon.net>
>> Content-Type: text/plain; charset="US-ASCII"
>> Hi guys,
>> I have asked this question several times over the past few weeks and get no
>> answer. Have I been ostracized??!!
>> Question is that I am looking for suggestions for GPS antenna for t-bolt.
>> The antenna that I am using now is a no name and I not know where it came
>> from! Wonder if a Garman GA-30 will work?
>> Bill, WA2DVU
>> Cape May, NJ
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Chuck Forsberg WA7KGX N2469R caf at omen.com www.omen.com
Developer of Industrial ZMODEM(Tm) for Embedded Applications
Omen Technology Inc "The High Reliability Software"
10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430
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