[time-nuts] HP 5090B

EWKehren at aol.com EWKehren at aol.com
Fri Oct 15 14:39:37 EDT 2010


Many of the units showed up in the early 90's on the European surplus  
market when Droitwich switched to 198 KHz as part of a global frequency  
realignment plan. I bought one and tried to convert it to 60 KHz. Not much luck.  
Still have it some where, got spoiled by Loran C and still use my Tracor 599 
and  an eight inch ferrite antenna here in Miami on 60 KHz. 
Bert Kehren
 
 
In a message dated 10/15/2010 1:27:48 P.M. Eastern Daylight Time,  
robert8rpi at yahoo.co.uk writes:

Hi  David,
I had one of these years ago. As others have said, its a UK 200kHz  
receiver. full of pot core transformers. I decided it was not worth the effort  to 
convert it to 198kHz. In the end I put a OCXO and divider in the  case.

Robert G8RPI.

--- On Thu, 14/10/10, David C. Partridge  <david.partridge at perdrix.co.uk> 
wrote:

From: David C. Partridge  <david.partridge at perdrix.co.uk>
Subject: [time-nuts] HP 5090B
To:  "'Discussion of precise time and frequency measurement'"  
<time-nuts at febo.com>
Date: Thursday, 14 October, 2010,  20:45

OK, I just got one of these as part of a lot of other test  gear.

What is it for?  I found nothing searching the archive, and  Google didn't 
help much either.  The Agilent site disclaimed all  knowledge!

I suspect it MIGHT be an off air frequency standard as it  has 1MHz and 
100kHz outputs and an aerial input.

Any clues - or  pointers to documentation?

Regards,
David  Partridge



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