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HP 3439A
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computeruser04
Hello All
I was just given an old HP 3439A Digital Voltmeter to play with. It has the 3443 High Gain/Auto Range plugin. The Nixie tubes light but display random digits. I have searched for a schematic and found nothing. Really, like others have said here before, its the challenge to see if I can get it functioning, so any info about it is appreciated. Thanks BL |
开云体育I
don't know if it will make you feel any better but I have a Fairchild Model
7000, 5 1/2 digit Nixie tube?DMM? and I use it all the time.?
Works perfect.? I also have a Systron Donner 6152A, 500 mHz Nixie freq.
counter and it also works perfect.? I love Nixies -no reading glasses
required!? The pinnacle of display technology, IMHO, ?was planar
gas.? LCD displays were the downfall of modern electronics- screw low power
consumption!?
?
Sorry
I can't help you with the schematic.? There are many vintage manual
resellers (and some free) ?out there? try:
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Good
Luck!
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--- In hp_agilent_equipment@..., "computeruser04"
<computeruser@s...> wrote: Hello AllDid you check all supply voltages for ripple? Power Supplys has to be checked first, ever! Jorgen |
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computeruser04
Ripple is about 1.5v on the 150v supplies and about .5v on the 50v
supply. This site: has the calibration procedure for the 3439A which gave me some more good information. This site: mentions the 3440A which is very similar and their unit has the same symptoms: "The nixie tubes light up, but multiple segments are on simultaneously" so I am thinking this problem is common on these units. Thanks for the replies so far. BL --- In hp_agilent_equipment@..., "Jorgen Lund-Nielsen" <dj0ud@w...> wrote: --- In hp_agilent_equipment@..., "computeruser04"about it is appreciated.Did you check all supply voltages for ripple? |
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Joseph Orgnero
Jorgen,
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I have an original manual for the HP 3440A voltmeter, which is the same as the 3449 except for the sample rate, cost U$S 12.00 plus shipping. Let me know if interested. Thank you. Joe Orgnero VE7LBI ----- Original Message -----
From: "Jorgen Lund-Nielsen" <dj0ud@...> To: <hp_agilent_equipment@...> Sent: 01 May 2004 06:05 PM Subject: [hp_agilent_equipment] Re: HP 3439A --- In hp_agilent_equipment@..., "computeruser04" |
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computeruser04
Joe
I am interested in the manual if it is a service manual with a schematic. You say it is the same as the 3449 (typo?) Is it the same as the 3439 except for the sampe rate? If so I am interested. leave me an email or web address Thanks BL --- In hp_agilent_equipment@..., "Joseph Orgnero" <joseph@p...> wrote: Jorgen,same as the 3449 except for the sample rate, cost U$S 12.00 plusshipping. Let me know if interested.with. schematicIt has the 3443 High Gain/Auto Range plugin. The Nixie tubes itsand found nothing. Really, like others have said here before, aboutthe challenge to see if I can get it functioning, so any info it is appreciated.Did you check all supply voltages for ripple? |
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Joseph Orgnero
Sorry, it was a typo, I should have typed 3440. The manual is operating
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and service with schematics. My e-mail is: joseph@... Thank you ----- Original Message -----
From: "computeruser04" <computeruser@...> To: <hp_agilent_equipment@...> Sent: 02 May 2004 11:53 AM Subject: [hp_agilent_equipment] Re: HP 3439A JoeSponsor ---------------------~--> Buy Ink Cartridges or Refill Kits for your HP, Epson, Canon or LexmarkCanada. ->
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