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Re: Thin black air filter foam
开云体育In the USA perhaps where most places have air-con and even hardware stores!!!? Sadly “the local hardware store” is long gone over here … I’ve never seen anything like it in the “DIY” stores here in the UK L ? I thought the stuff offered on eBay a bit spendy and even though I found it a bit cheaper on Amazon, in the end I cut down one of those green nylon scouring pads which cost next to nothing and looks to have a similar pore size. ? Dave ? From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...]
Sent: 14 July 2017 07:47 To: hp_agilent_equipment@... Subject: Re: [hp_agilent_equipment] Thin black air filter foam ?
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Re: Thin black air filter foam
erie patselllis
Local hardware store, a couple of dollars for a huge piece. ?
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On Friday, July 14, 2017, 1:10 AM, 'David C. Partridge' david.partridge@... [hp_agilent_equipment] wrote:
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Re: Thin black air filter foam
开云体育Darn! Thank you, that’s the stuff!? The magic incantation seems to be computer dust filter! ? Thanks again Dave ? ? From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...]
Sent: 14 July 2017 07:23 To: hp_agilent_equipment@... Subject: Re: [hp_agilent_equipment] Thin black air filter foam ?
Neil G4DBN ?
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Re: Thin black air filter foam
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8757C mother board
I am in need of a 08757-60066 mother board for a 8757C.
The 8757C that I bought cheap had a CPU battery leak and has made a mess of the motherboard. Before I remove, clean and rebuild the traces on this damaged mother board, I though That I would ask the community if one is available from a scrapped unit. Appreciate any help. Thanks 73 Glenn -- ----------------------------------------------------------------------- Glenn Little ARRL Technical Specialist QCWA LM 28417 Amateur Callsign: WB4UIV wb4uiv@... AMSAT LM 2178 QTH: Goose Creek, SC USA (EM92xx) USSVI LM NRA LM SBE ARRL TAPR "It is not the class of license that the Amateur holds but the class of the Amateur that holds the license" --------------------------------------------------------------------------- |
Re: Replace Neon NE-2 with Zener in 141T PSU?
Replacing the ZZ1000 - My Summary.
A high-voltage zener will add a lot of drift. It's a hassle to ovenize it. Nine 9V zeners is better but still pretty bad. To meet spec you have to use what HP used, the 1N938, a special temperature-compensated part which costs over $10 each today. That's too expensive. It's a hassle to rework the board to use a single 1N938 the way HP did. Ed Breya's TL431 suggestion is the only one that's cheap, easy, and pretty good. That's a TL431 plus a 65-75V zener. 150k and 4.7k in the divider gets you 82V. No other changes needed. That's how I see it. Dave Wise |
Re: Replace Neon NE-2 with Zener in 141T PSU?
arie schellaars
Hi from down under.
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From memory I used an 8.2K 1 watt resistor as that is what I had on hand. Also placed 68V and 14V zeners in series to make the necessary 82V level and again this is what was in junk box. Hope that helps. Cheers and 73's Arie VK3DBF -------------------------------------------- On Fri, 14/7/17, w7qed@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote:
Subject: Re: [hp_agilent_equipment] Replace Neon NE-2 with Zener in 141T PSU? To: hp_agilent_equipment@... Received: Friday, 14 July, 2017, 3:30 AM ? Hi Arie, I will definitely try that first, removing the board does look like a hassle.? What value of resistor did you end up with for R21 (5.4k is stock)?? 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Re: Wanted: HP Laserjet 4
Hi:
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My HP 4050N with Duplex option got erratic so, after some research, got an HP LaserJet Pro M501DN (with Duplex and Networking). After some problems that were fixed by upgrading the printer firmware (I bought it new) and upgrading the drivers, it's very much like the 4050. PS the problem was poor seating of the LAN card in the 4045. Removing it and reinstalling fixed the problem. -- Have Fun, Brooke Clarke -------- Original Message --------
Re: Wanted: HP Laserjet 4 |
Re: Wanted: HP Laserjet 4
Always thought it was funny that the HP 8150 and the Lexmark Optra N are almost exactly the same - only the control panel is different. On Thu, Jul 13, 2017 at 9:41 AM, Norm n3ykf normanlizeth@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote:
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Re: Wanted: HP Laserjet 4
Norm n3ykf
Depends on whether it's been rehabbed. Think the fuser is rated for 60k. Service manual shows intervals. Most well made things run for a long, long time if the prescribed preventative maintenance is done.The bay shows many units for sale with 200k+. Starting at $200. Think I paid 75$ for a complete consumables kit minus the fuser. (rollers, gears, pads, etc.) Takes 45 minutes to do. (took me an hour prep time to make sure I knew what to do.) On Thu, Jul 13, 2017 at 1:59 PM, Bob Albert bob91343@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote:
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Re: Wanted: HP Laserjet 4
Bob Albert
Okay I got the page count.? It's 56110.? Is that a high or low figure? Bob On Thursday, July 13, 2017 10:49 AM, "Norm n3ykf normanlizeth@... [hp_agilent_equipment]" wrote: This one does a better job with the sub models, including the second test page: On Thu, Jul 13, 2017 at 1:19 PM, Norm n3ykf <normanlizeth@...> wrote:
> > > Take care! One of the settings in this menu tells it to continue printing > test pages forever............................ > > Check your printer for it's actual part number. Some are slightly different, > so a trip to the manual may be necessary. Not all LJ4's are LJ4's. They were > produced for more than a few years and saw high penetration into the > gov/biz/edu market. > > IIRC there are two test pages. One gives setup info, the other gives printer > engine details and installed option data. > > Playing in our "Obsolete world" gives me hours and hours of quality > entertainment. > > Norm > ------------------------------------ Posted by: Norm n3ykf <normanlizeth@...> ------------------------------------ ------------------------------------ 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: ? ? |
Re: Asymmetric trace "dot" on Hp 141-T display section
开云体育????????? Its been many years since I worked on a 141 but it seems to me it has an astigmatism adjustment in it. Listed in the handbook somewhere. Correcting this effect is what its for. You need to juggle between it and the focus to find the sharpest dot.On 7/13/2017 10:39 AM, w7qed@...
[hp_agilent_equipment] wrote:
-- Richard Knoppow dickburk@... WB6KBL |
Asymmetric trace "dot" on Hp 141-T display section
Hi All, On my recently acquired HP-141T,?8554B and 8552B plugins, I noticed that the trace has a sort of vertical thickness to it, as though someone is drawing the traces using a calligraphy pin oriented vertically. Horizontally, the trace is very sharp. Adjusting the focus makes it possible to bring the "dot" to a symmetric and round but fuzzier shape. I am using the "manual sweep" mode to judge the shape of the dot. The total height of the dot, vertically, is probably 4 or 5 mm.? I then connected a tek 475 scope to the Vertical and Scan outputs. With the scope in XY mode, the trace is super crisp and does not have a vertical elongation to it. I think this test exonerates the plugins from causing the issue, but leaves the display section in question. Thanks for any insights you may have,? --Elliott W6EL ? |
Re: Wanted: HP Laserjet 4
Norm n3ykf
This one does a better job with the sub models, including the second test page:
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On Thu, Jul 13, 2017 at 1:19 PM, Norm n3ykf <normanlizeth@...> wrote:
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Re: Wanted: HP Laserjet 4
Norm n3ykf
Take care! One of the settings in this menu tells it to continue printing test pages forever....................... IIRC there are two test pages. One gives setup info, the other gives printer engine details and installed option data. Norm |
Re: Wanted: HP Laserjet 4
Bob Albert
How do you find the page count on an LJ4? Bob On Thursday, July 13, 2017 9:47 AM, "Norm n3ykf normanlizeth@... [hp_agilent_equipment]" wrote: 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$+! Most have 200k+ page count. Not willing to take a risk for that price. Took Dave's advice. Bought an 8150DN, low page count. (26k) Seeing these units for sale with 1M+ imprints is common. My choice was based on what would be supported in 10 years. LJ4's are 20 years old now. Nothing wrong with age. Parts are becoming difficult to find at a reasonable price, however. It's in a storage trailer. Due to the new abode, I'll see that stuff shortly before the snow flies. No use to me now. On Thu, Jul 13, 2017 at 12:16 PM, Daniel Koller kaboomdk@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote:
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Re: Wanted: HP Laserjet 4
Norm n3ykf
Have parts and toner. Just like having several of one piece of test gear. Swap parts, keep it running. As others have concurred, commercial equipment used in a home business lasts and lasts and lasts. Cheep to run and service. LJ4's have gone sky high on the bay. 200$+! 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. |