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- HP-Agilent-Keysight-Equipment
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Re: Wanted: HP Laserjet 4
Norm n3ykf
Have parts and toner. Just like having several of one piece of test gear. Swap parts, keep it running. As others have concurred, commercial equipment used in a home business lasts and lasts and lasts. Cheep to run and service. LJ4's have gone sky high on the bay. 200$+! Most have 200k+ page count. Not willing to take a risk for that price. Took Dave's advice. Bought an 8150DN, low page count. (26k) Seeing these units for sale with 1M+ imprints is common. My choice was based on what would be supported in 10 years. LJ4's are 20 years old now. Nothing wrong with age. Parts are becoming difficult to find at a reasonable price, however. It's in a storage trailer. Due to the new abode, I'll see that stuff shortly before the snow flies. No use to me now. On Thu, Jul 13, 2017 at 12:16 PM, Daniel Koller kaboomdk@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote:
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Re: Wanted: HP Laserjet 4
Hi Norm, Why (do you need a laserjet 4), may I ask? ? Dan On Wednesday, July 12, 2017, 4:20:13 PM EDT, Norm n3ykf normanlizeth@... [hp_agilent_equipment] wrote:
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Title says it all. Reasonalbe page count, please. Must be working. |
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Re: ifr 2390 analyser
Bob Ocallaghan
hi cliff,,,,good to hear from you...both numbers are in my phone now,,not too good last few days so will get back to you..with mail info on 10 ghz,,,soon as poss...have stopped ..yahoo groups...i had loads of e mails,,,none to do with my request,,,50 each day nearly. keep well and xyl.. bob.ocall From: "Cliff Barber g4bgp@... [hp_agilent_equipment]" To: "hp_agilent_equipment@..." Sent: Tuesday, 11 July 2017, 11:49 Subject: Re: [hp_agilent_equipment] ifr 2390 analyser
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Hello Bob, Please call me on either landline or mobile. Tnx Cliff G4BGP
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Re: Wanted: HP attenuator 90dB 15VDC 20GHz
Call planet Surplus, New Smyrna Beach, Fl, ask for John, tell him Dennis sent you, 386-847-8806, Remember seeing some on the shelves 18ghz??
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Re: 141T reference replacement..a cure??
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Working on another fault in this supply..... an
idea surfaced that might cure this problem.
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Neon tubes run in the dark eventually become
difficult to strike due to the "shortage" of ions and free electrons to start
the avalache process. Tubes protecting sub cable amps had radioactive components
to ensure there were always a few electrons floating around. It is possible to
"cure" lazy neons by leaving them on a windowsill in the sunshine for a few
days. I have not done this and am not sure how long the cure lasts,
BUT........and this is just an idea, I have not tried it !.
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It should be reasonably straightforward to connect
a UV LED in the unit close to the neon to ensure that there are always a few
electrons around. I suppose it might not work too well if the unit was not
powered up very often (Who can afford the bench space for a 141T frame and not
use it regularly ?? :-))? ) It may save a few fuse blowings......these only
seemed to happen as the units got older.?It might be easier that lifting
the PCB to do a "proper" repair.It?is possible to lift the pcb?without
disconnecting all the red traced white wires to the tags but it is difficult,
and possibly risks damage. I have done it once.
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Alan
G3NYK
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Re: 141T reference replacement
I don`t think its a NE2 used as the voltage reference in the 141T psu pcb, I think its a genuine 82 volt reference tube with good TC. Its a pity they didn`t include a little speck of radium or similar to ensure that the gas remains ionised to some extent, thus overcomming the problem of rising striking voltage as the tube ages. This is what causes the crobar SCR, downstream to mysteriously blow fuses, just before the gas tube strikes. Later versions of this PCB used a similar PCB layout, but a low voltage Zener reference diode. You might find this later circuit of interest. Cheers!......................................Donald Collie ZL4GX ? On Thu, Jul 13, 2017 at 5:44 PM, ulf_r_k@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote:
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Re: HP 9000 300 & HP-HIL keyboard
¿ªÔÆÌåÓýHi brunonorth? sorry as I am missing your name ? Regarding a crimping tool I am going to get another crimping tool for a British phone plug and try to modify it for the job ? Otherwise it will be a vice then push in the individual elements in with a screw driver not forgetting the cable clamp at the rear Regards ?Paul B???? south cost UK ? From:
hp_agilent_equipment@...
[mailto:hp_agilent_equipment@...]
? ? Hi Paul, ? Good to hear that my info on the connectors from Apr 5 was useful. ?
? Apparently, there are some (minor?) differences between the original HP connectors vs. the AMP/TE in terms of color and strength of the keying ridges.? ? I'm curious as to what you used to crimp the connectors. No virus found in this message. |
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Re: 141T reference replacement
Perhaps a bit OT to the current subject, but: I had a friend who had problems with his 141T. The supply voltages were unstable, the CRT did not respond to brightness and focus adjustments, etc. We could not see any visual cracks. The semicoductors were all OK when tested. In the end,?we took out the PSU-board and resoldered it. That did the trick. Ulf - SM6GXV |
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Re: Getting the most amplitude stable CW signal from the HP8350B/83592B
As a acquisition delayed followup, I got the 8472B detector from eBay (perfect) and used it with the HP83592B sweeper plugin in CW mode. With some tinkering of the leveling feedback pot, I achieved +- 1 dB leveling over 0.01 to 20 GHz. This was twice as good as the Internal Leveling over the same 4 bands, but not nearly good enough to calibrate some spectrum analyzers without an axure way to measure the output power to about +-~ 0.1 dB.
That is how I "discovered" the wonderful works of the Agilent/Keysight USB Power Sensors and 2 software options (N1918A and BenchVue) to read and control them. Boy, am I earning eBay $$! I am sure that will lead to more posts after I get in a dozen hours or so of learning about them. BobD |
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Re: HP 5335a opt 40 (HPIB input amplifiers) manual
Tom Miller
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How about sending it to KO4BB.COM ?
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Re: Wanted: HP Laserjet 4
¿ªÔÆÌåÓýOn 07/12/2017 09:14 PM, Norm n3ykf
normanlizeth@... [hp_agilent_equipment] wrote:
?Don't know anything about page count. The printer I have offered you free has been refurbished by a professional service--Stafford Associates--and it works fine. You have my information. Doug |
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HP 5335a opt 40 (HPIB input amplifiers) manual
Norm n3ykf
Anyone who wants a copy of the manual, let me know. It's 23 Mb. QC'd complete
Did the A4 scans here and had the wide pages done at the local vendor. I checked, Keysight maintains the Agilent ftp upload site (customer provided documentation for obsolete products). Sent an email to the caretaker and it bounced. Anyone know if these docs will make their way out to the catalog? I.E. continue tacit support for legacy products? Do want this to make it's way out to the community. In short, it's the command set for the input amplifers. Norm n3ykf |
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Re: Wanted: HP Laserjet 4
Norm n3ykf
A+ for all the input. If I can't get a low page count LJ 4 or a small stack of them (refurb one plus parts), a newer one, I.E. 8150DN is probably the answer. There is one on the place of all things, low page count. A drive, though. Too many items ruined by common carriers. I try to pick up anything of weight that has some intrinsic value. Calling the cops on the real estate droid wouldn't do much. OTOH, calling the broker (her boss) sounds like a solution. He's going to lose the big commission. All the HP test gear made it through the move. I should be grateful. Norm n3ykf |
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Re: Wanted: HP Laserjet 4
Peter Reilley
¿ªÔÆÌåÓýOne thing you might look at while considering color printers: is it telling on me?Modern color printers put a pattern of yellow dots on the printed page as mandated by the government.?? These dots encode things like the printer model, serial number, and IP address.?? Older printers do not do this.?? Here is a list of printers that do and do not put these tracking dots on the page. Pete. On 7/12/2017 9:02 PM, Bob Albert
bob91343@... [hp_agilent_equipment] wrote:
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Re: Wanted: HP Laserjet 4
Bob Albert
Norm,? thanks for the insights on the printer.? I will keep it, as it's my only duplex unit (not counting my daughter's unit).? I may pick your brain regarding MRO supplies if any are needed in the future.? I do weigh the cost of the supplies against just using a single sided printer and spending more on paper.? Or I may bite the bullet and buy one of the newer color laser jobs for around $200. Bob On Wednesday, July 12, 2017 4:45 PM, "John Griessen john@... [hp_agilent_equipment]" On 07/12/2017 03:56 PM, Dave McGuire Mcguire@... [hp_agilent_equipment] wrote: > Personally, I use HP's older enterprise-grade printers, like the > 8150DN (mono) and 8550DN (color I had an 8550dn for? a good while, but the toners went up? up up in price so I figured it was in obsolete mode.? Now I use a 4700n color with good results. I had a nice 5si, but the plastic frame doing the engage and latch of print drawers cracked on two of them and I sent them to the crusher. 4050tn is OK, but not nearly as robust as the 5si, (until the plastic cracking death happened) So sad. -- John Griessen -- building lab gear for biologists Ecosensory? Austin TX? ecosensory.com ------------------------------------ Posted by: John Griessen <john@...> ------------------------------------ ------------------------------------ Yahoo Groups Links <*> To visit your group on the web, go to: ? ? <*> Your email settings: ? ? Individual Email | Traditional <*> To change settings online go to: ? ? ? ? (Yahoo! ID required) <*> To change settings via email: ? ? hp_agilent_equipment-digest@... ? ? hp_agilent_equipment-fullfeatured@... <*> To unsubscribe from this group, send an email to: ? ? hp_agilent_equipment-unsubscribe@... <*> Your use of Yahoo Groups is subject to: ? ? |
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Re: HP 9000 300 & HP-HIL keyboard
Hi Paul, Good to hear that my info on the connectors from Apr 5 was useful. For further info, see pages 2-6, 2-7 of: Apparently, there are some (minor?) differences between the original HP connectors vs. the AMP/TE in terms of color and strength of the keying ridges.? I'm curious as to what you used to crimp the connectors. |
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Re: Wanted: HP Laserjet 4
On 07/12/2017 03:56 PM, Dave McGuire Mcguire@... [hp_agilent_equipment] wrote:
Personally, I use HP's older enterprise-grade printers, like theI had an 8550dn for a good while, but the toners went up up up in price so I figured it was in obsolete mode. Now I use a 4700n color with good results. I had a nice 5si, but the plastic frame doing the engage and latch of print drawers cracked on two of them and I sent them to the crusher. 4050tn is OK, but not nearly as robust as the 5si, (until the plastic cracking death happened) So sad. -- John Griessen -- building lab gear for biologists Ecosensory Austin TX ecosensory.com |
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Re: Wanted: HP Laserjet 4
¿ªÔÆÌåÓýOn 07/12/2017 03:20 PM, Norm n3ykf
normanlizeth@... [hp_agilent_equipment] wrote:
?Would you accept a LaserJet 2200D with a JetDirect card, all in working condition, including at least one--maybe two--HP96A carrtidges?? I replaced this working printer because of a network problem that was not its fault. It work s fine. On eastern Long Island. I will not ship. Free for pickup with the extra HP toner. Reply to (dmcgarrett)? (at) (optonline) (.) (net) |
Gary Neilson
Paul Bicknell
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