[time-nuts] Monitoring the Rapco 1804M - how antenna changes affect the unit

[Joe Leikhim]

So easily a 20 dB shortfall. I will look out for a similar antenna. Thanks

On 11/2/2011 5:01 PM, Robin Kimberley wrote:
> The ET6000 used Trimble Bullet antennae when I was selling them in the UK. I
> seem to remember about 35db of gain in that antenna.
>
> Rob Kimberley
>
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of Joe Leikhim
> Sent: 02 November 2011 18:52
> To: time-nuts at febo.com
> Subject: [time-nuts] Monitoring the Rapco 1804M - how antenna changes affect
> the unit
>
> I tried a similar Garmin antenna with my Datum ET6000 and the lock times
> were really long, even with the antenna on a 14 foot pole above the roof.  I
> attribute a lot of this to the long 8 ft RG174 style coax pigtail. I have to
> wonder if the gain of the preamp as published actually includes the inherent
> cable loss, and even if so the preamp must be screaming in gain to make up
> for the loss. I intend to get a proper antenna.
>
> Here is a comparison of specs of these type antennas:
>
> http://gpsinformation.net/main/gpsantrev1.htm
>
> --
> Joe Leikhim
>
> Leikhim and Associates
> Communications Consultants
> Oviedo, Florida
>
> www.Leikhim.com
>
> JLeikhim at Leikhim.com
>
> 407-982-0446
> WWW.LEIKHIM.COM
>
>
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-- 
Joe Leikhim

Leikhim and Associates
Communications Consultants
Oviedo, Florida

www.Leikhim.com

JLeikhim at Leikhim.com

407-982-0446
WWW.LEIKHIM.COM