Hi Miguel,

• extract the cal data asap - if it's called '3458ACalramExtract.exe' or '3458ACalibration.exe', the windows utility is my authorship btw. I'll see if I can dig up a newish build. It's a console app, use /? to get the parameters.
• have a look at TiNs teardowns to familiarise yourself with the layout: https://xdevs.com/fix/hp3458a/
• take the top off the unit, get the chip date codes, see whether the cal chips are socketed, suck the dust off the filter etc. It's probably not necessary to say - but don't get fingerprints etc on the analogue & ref boards - treat them with proper respect. The other boards are fine to handle.
• run the various tests e.g. SN18.
• refurb with these parts when you get time: http://anagram.net/nuts/3458A/3458a%20refurb%20parts.xlsx . I bought some calram chips from DigiKey recently. The hardest part is the big capacitor '53D832G035JP7'. I found it at Avnet in 2015, but I can't see any stock there now.
• don't worry, have fun

Alan

p.s. some parts, mech etc, are still available direct from Keysight, some e.g. VFDs, feet etc from eBay

From: Alan Ambrose
Sent: 30 July 2019 09:33
To: 'volt-nuts@lists.febo.com' volt-nuts@lists.febo.com
Subject: Re: Just got an Agilent 3458A

Hi Miguel,

• extract the cal data asap - if it's called '3458ACalramExtract.exe' or '3458ACalibration.exe', the windows utility is my authorship btw. I'll see if I can dig up a newish build. It's a console app, use /? to get the parameters.
• have a look at TiNs teardowns to familiarise yourself with the layout: https://xdevs.com/fix/hp3458a/
• take the top off the unit, get the chip date codes, see whether the cal chips are socketed, suck the dust off the filter etc. It's probably not necessary to say - but don't get fingerprints etc on the analogue & ref boards - treat them with proper respect. The other boards are fine to handle.
• run the various tests e.g. SN18.
• refurb with these parts when you get time: http://anagram.net/nuts/3458A/3458a%20refurb%20parts.xlsx . I bought some calram chips from DigiKey recently. The hardest part is the big capacitor '53D832G035JP7'. I found it at Avnet in 2015, but I can't see any stock there now.
• don't worry, have fun

Alan

Thanks.
Alan I cant find that program to extract the data.

From: volt-nuts volt-nuts-bounces@lists.febo.com on behalf of Alan Ambrose alan.ambrose@anagram.net
Sent: Tuesday, July 30, 2019 3:35 AM
To: volt-nuts@lists.febo.com volt-nuts@lists.febo.com
Subject: Re: [volt-nuts] Just got an Agilent 3458A

p.s. some parts, mech etc, are still available direct from Keysight, some e.g. VFDs, feet etc from eBay

From: Alan Ambrose
Sent: 30 July 2019 09:33
To: 'volt-nuts@lists.febo.com' volt-nuts@lists.febo.com
Subject: Re: Just got an Agilent 3458A

Hi Miguel,

• extract the cal data asap - if it's called '3458ACalramExtract.exe' or '3458ACalibration.exe', the windows utility is my authorship btw. I'll see if I can dig up a newish build. It's a console app, use /? to get the parameters.
• have a look at TiNs teardowns to familiarise yourself with the layout: https://xdevs.com/fix/hp3458a/
• take the top off the unit, get the chip date codes, see whether the cal chips are socketed, suck the dust off the filter etc. It's probably not necessary to say - but don't get fingerprints etc on the analogue & ref boards - treat them with proper respect. The other boards are fine to handle.
• run the various tests e.g. SN18.
• refurb with these parts when you get time: http://anagram.net/nuts/3458A/3458a%20refurb%20parts.xlsx . I bought some calram chips from DigiKey recently. The hardest part is the big capacitor '53D832G035JP7'. I found it at Avnet in 2015, but I can't see any stock there now.
• don't worry, have fun

Alan

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