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

Joe Leikhim JLeikhim at Leikhim.com
Wed Nov 2 17:04:47 EDT 2011


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
>
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>
>
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 2012.0.1834 / Virus Database: 2092/4591 - Release Date: 11/02/11

-- 
Joe Leikhim

Leikhim and Associates
Communications Consultants
Oviedo, Florida

www.Leikhim.com

JLeikhim at Leikhim.com

407-982-0446
WWW.LEIKHIM.COM





More information about the time-nuts mailing list