[time-nuts] HP-58532A antenna

[Arnold Tibus]

Hello everybody, 
I have the antenna discussed and actually shown by accelium 
on ebay as "GPS ANTENNA HP 58532A L1 LUCENT SYMM...", 
in my hands, but mine is labelled underneath as:

DATUM IRVINE
ANTENNA-GPS
P/N 2640NW-D/E Date: 38/00

The gain is (nominal) 26dB, according the label,
(unfortunately I have no Datasheet, and I can not measure 
the real characteristics either). I don't see a similarity with the 
hp-53532A.

The same Antenna (apparently)  I have in my mind was labelled as 
Lucent brand and with 26dB(i) gain as well on same sticker,
P/N KS-24019L112A,  LUCENT-CC 407996859

The housing of the original HP-50532A I have on my 
desk has a different housing, another mounting part and other 
tech data, eg. the gain is specified to be >30dBi to 38dBi at 90° 
I confirm that the VT100 looks to be the same as the 
HP-50532A, at least from the outside view, but different from the 
Datum/ Irvine antenna. --> these are clearly different antennas!

To complete the confusion
I have seen the antenna Lucent KS-24019L112  (on picture), 
but this one is looking different again, my impression is
that the mounting tube could be the same as known from 
the HP-antenna. The supply voltage is labelled to be 5-26 VDC, 
perhaps having an internal down-regulator (higher pwr need?). 
I have no further knowledge of this antenna either. 

My additional questions: 
I would like to know, what is the difference 
of the hp-58504A (has a flat top) compared with these 
others, how does this one behave? Is this a low cost version?
Can this antenna be mounted on a car roof?
What antenna would be best for time nut purposes with 
about 15 to max 20 m length of RG213/ RG214? Or Is it 
perhaps better to keep the signal strength at the rx-input
lower by using a coax cable with higher losses (for not 
driving the input-amplifier of the GPS receiver into saturation)?

many thanks in advance,
regards

Arnold, DK2WT





On Thu, 15 Mar 2007 09:08:30 -0700, Randy Warner wrote:

>Colin,

>The HP58532A is also commonly known as the VIC-100: 

>http://pewa.panasonic.com/emp/products/gps_pdf/Panasonic_VIC100_Antenna_9_06
>.pdf. 

>Lucent had a special modified version produced with a lower gain LNA for
>short cable lengths. The "KS" spec you supplied is Lucent's P/N for the low
>gain variant.

>Randy

>____________________________________________________________________

>-----Original Message-----
>From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
>Behalf Of Colin Bradley
>Sent: Thursday, March 15, 2007 4:29 AM
>To: time-nuts at febo.com
>Cc: colinbradley10 at yahoo.com
>Subject: [time-nuts] HP-58532A antenna

>I just purchased a GPS antenna on eBay that was listed as an HP-58532A. It
>does not have the look or dimensions of the 58532A. It is marked as a Lucent
>KS-24019L112A. The case is marked with 26dB gain and comes with a type N
>connector. The seller is accelium. Does anyone know if this is in fact a
>58532A or did someone other than HP/Symmetricom produced it?
>Colin


> 
>____________________________________________________________________________