Hi,
I have an HP 8412B and an HP 8413A, which go with the HP 8410, for $ 30.00
( maybe less) each plus actual shipping.
They look good but I have no way to test then since I have no mainframe.
Contact offline if interested. I can email pictures.
They will be at the Huntsville Hamfest later this summer.
Bill Reed ree...@otelco.net
-----Original Message-----
From: Alexander Pummer
Sent: Monday, June 02, 2014 5:18 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] VNA design
Although I used to work for one of the competitor, I still do have a
complete working 8410, Rick is right, it is a very nice teaching tool
73
KJ6UHN
On 6/2/2014 2:36 PM, Richard (Rick) Karlquist wrote:
On 6/2/2014 12:41 PM, Brooke Clarke wrote:
Hi:
I started with the HP 8410 and added an external computer.
Since it can be used manually I think it's an excellent way to learn
about VNAs.
http://www.prc68.com/I/MWTE.shtml#NA
For my last 8 years at Agilent before retiring in March, I
was doing advanced R&D on network analyzers. The newer
guys coming up didn't have an intuitive understanding of
network analyzer architectures like I did. I
started using the 8410 back in 1973 before I even worked
for HP. Because of the modular design, it was like a
teaching tool that forced you to understand what was
going on. When I mentored the young guys, I would
explain to them a lot of principles based on the 8410.
Modern network analyzers are too "automatic".
The 8410 puts modern VNA's into perspective. BTW, I used
to sit next to Dick Lee, who was a member of the 8410
design team in 1963 at the dawn of the golden age of
microwave instruments based on YIG tuned oscillators
and step recovery diode samplers.
As you noted, the architecture was built around the YIG tuned oscillator
and certain things were done that way they were because of that.
Rick Karlquist N6RK
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