Re: new File called App notes
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Bill, would love to see what you do with your 400F, especially if I can copy it for my 400EL!?
I was also fortunate to be at HP Santa Clara for most of the 1970s ?(Division 02, the old ¡°Frequency and Time¡± division that moved down from Palo Alto in the 1960s). Those were indeed good days, when HP had more money than it knew what to do with and ¡°we need it¡± was sufficient justification for almost any purchase.?
Jeremy?
On Sun, Apr 19, 2020 at 11:09 PM Bill Perkins < sales@...> wrote: ? ? ? ? I'm younger than you but I wish I'd been in northern CA for "The Bill
and Dave Show" years.
? ? ? ? I've read a number of books about HP through "The Era" and am filled
with admiration; all the moreso when I turn on a 45-50yo network
analyzer and it not only lights up, it meets spec!
? ? ? ? Being in audio and one who does a lot of measurement of microvolt noise
floors, the HP 400F AC voltmeter is a piece I like a lot.
? ? ? ? I have several and have been thru them, done all the geriatric part
replacements, done some mods, changed out the ridiculous dual banana
inputs for BNCs and am about to replace the input JFETs with their about
80nv/rtHz equiv input noise for some some parts from Linear Integrated
that promise 2nv/rtHz and spec-wise look pretty much to be a drop in
replacement, amazingly.
? ? ? ? I'll advise when done, or beg help if I've done something dumb.
? ? ? ? Bill @ PEARL, Inc.
> As I remember and lived through (I am 77 years of age), HP was a company
> that innovated, invented and changed the testing industry. They treated
> their employees and customers with respect and were great educators, and
> made a great effort to educate all who were interested.
>
> As has been stated by others, much of their current management, as
> Keysight, doesn't even seem to know what business they are in, and
> really doesn't care.
? ? ? ? And more's the pity; all around . . .
> I am glad that I was around for the "golden years".
>
> Stuart K6YAZ
> West Hills, CA
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Jeremy Nichols