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Date
Re: Book on Hp
Bill I think I know that telco supplier. Comments are accurate. Yes HP and the others we know have gone away. Especially the research that delivered great equipment. But everything moves on. I enjoy
By paulswed · #105356 ·
Re: HP8562A Errors 304,335,317,333
The Configuration is a voltage doubler directly coupled on the 60khz switch mode transformer. It is a well known failure that the capacitor goes open. Ofthen with cap getting bulky. Change it to a
By Peter Hansen · #105355 ·
Re: Book on Hp
One of my favorite rants, modern engineering is all about churning out the minimum kit that a company can sell. HP lost its way long ago, friend of mine worked there on some of the fabulous stuff that
By Bill E · #105354 ·
Re: Seeking Spring Nuts for Series 1 cabinet
Forgot to say, 740B is Original "series I"
By Robert G8RPI · #105353 ·
Re: Book on Hp
"Soul of a New Machine" was a great book. Started reading it at lunch hour at college. I think in third year. Finished it in one sitting. Skipped classes till I was done that day. Changed the
By Dave Miller · #105352 ·
Re: Seeking Spring Nuts for Series 1 cabinet
HP never called the original modular cases System I but did call the later one System II Original (System I) had one piece cast alloy side panel frames with continious exposed edge and vinyl coated
By Robert G8RPI · #105351 ·
Re: Series 1 & 2 boxes (was Seeking Spring Nuts for Series 1 cabinet)
Hi Dave!Series One is the 200C, etc, series of rounded corner cabinets that housed Rack mount instruments. The 340 Noise figure meter is an example that comes to mind: A puce cabinet that is held in
By Jeff Kruth · #105350 ·
Re: Book on Hp
I'm not an avid book reader but I have read "Soul of a New Machine" (twice as I recall) and I found that book fascinating and kept my attention throughout. Those guys worked so hard on that project.
By n4buq · #105349 ·
Re: Book on Hp
I also recommend the following: ¡°The HP Way: How Bill Hewlett and I Built Our Company¡± by David Packard ISBN 978-0-06-084579-7 ¡°Bill & Dave¡¯s Memos: A Collection of Bill Hewlett & Dave
By Greg Muir · #105348 ·
Re: Seeking Spring Nuts for Series 1 cabinet
??Thank you, Jeff! I only need two. I'll send you my address off-list. Now I'm confused. If I'm Series 2 (cast Al sides), then what was Series 1? Is there a cheat sheet, or representative example
By Dave Wise · #105347 ·
Re: Seeking Spring Nuts for Series 1 cabinet
??No joy there either. McMaster does have one "clip-on nut" for number 6 sheet metal screw and 1/8-inch panel but the throat depth (from bend to hole) is about twice the 3/16-inch I require. Fastenal
By Dave Wise · #105346 ·
Re: Seeking Spring Nuts for Series 1 cabinet
I have a stash from scrapping HP stuff. How many do you need? Also isnt the 740 a series 2 cabinet? With the cast Aluminum side rails, etc? Jeff
By Jeff Kruth · #105345 ·
Re: Book on Hp
I did love my coffee and donuts every morning at 10:00, I miss those days steve Sent: Monday, April 20, 2020 11:29 PM To: [email protected] Subject:
By Stephen Hanselman · #105344 ·
Re: HP K21-5321B Digital Clock
Philipp, What is the clock doing/not doing. I went looking for our manuals and it seems they did not survive the purge. One thing to do as a preventative measure is to look at the row of chips next to
By Stephen Hanselman · #105343 ·
Re: new File called App notes
First place to look is the PSU caps as always... Nigel Adams - Marconi Instruments Heritage Collection
By nigel adams · #105342 ·
Re: new File called App notes
My 400EL (S/N prefix 949) has succumbed to meter scale rot, but I hooked an analog DC voltmeter to the DC OUTPUT banana jacks on the rear panel. It reads 29mV +/- 1mV of jitter. It drops 1mV when I
By Dave Wise · #105341 ·
Re: HP8562A Errors 304,335,317,333
I assume that the C301 is connected to the top of the transformer that the lower CR304 is connected. They are coupling some of the AC from the transformer up to CR301/CR302. I don¡¯t work on doublers
By Stephen Hanselman · #105340 ·
Re: Book on Hp
Greetings, It IS a fantastic book. I have read and reread it. I have also given several copies away - not just for historical reasons but to show managers how it is possible to create a great company
By ken chalfant · #105339 ·
Re: Seeking Spring Nuts for Series 1 cabinet
The ones McMac lists are not designed to be used on 1/8" thick panels, but for thinner sheet metal. I too would like to find a source for spares, so I'm following this as well. -Pat
By Cubdriver · #105338 ·
Re: Seeking Spring Nuts for Series 1 cabinet
Greetings, How about McMaster Carr or Fastenal? Worth a shot. Good hunting! Ken
By ken chalfant · #105337 ·