Author Topic: WTB (FR/EU): rear terminals / High voltage board for HP 3457A  (Read 355 times)

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Offline Tazz

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WTB (FR/EU): rear terminals / High voltage board for HP 3457A
« on: September 17, 2020, 07:50:28 pm »
Hello,

For completing the HP 3457A that I'm restoring, I'm looking for (ordered by priority):
- The standard rear terminal assembly (A5 ref 03457-67901)
- wiring block assembly for 44491A (ref 44493A)
- complete high voltage attenuator assembly (ref 44497A with his rear terminal)
- front handle (5060-1170)

Thank you !
Emmanuel.
« Last Edit: October 24, 2020, 03:37:18 pm by Tazz »
 

Offline srb1954

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Re: WTB (FR/EU): rear terminals / High voltage board for HP 3457A
« Reply #1 on: September 18, 2020, 06:41:00 am »
Hello,

For completing the HP 3457A that I'm restoring, I'm looking for (ordered by priority):
- The standard rear terminal assembly (A5 ref 03457-67901)
- wiring block assembly for 44491A (ref 44493A)
- complete high voltage attenuator assembly (ref 44497A with his rear terminal)
- front handle (5060-1170)

Thank you !
Emmanuel.

I suspect the the 44493A connector block is extremely rare as the 44491A relay modules were not that common to start with and recyclers usually pull the connector block and dump it with the attached wiring rather than keeping it with the instrument.

A possible solution is to use a connector block from the plug-in modules (44470A, 44471A, 44473A, 44474A, 44475A) as used in the 3488A Switch/Control unit.  I only have a 44494A connector block to compare but the 3488A connectors appear to be identical except for the position of the PCB coding key. You could remove or relocate the coding key to suit the 44491A.
 
The following users thanked this post: Tazz

Offline Tazz

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Re: WTB (FR/EU): rear terminals / High voltage board for HP 3457A
« Reply #2 on: September 18, 2020, 10:27:02 am »
Yes I thing you're right. Thank you for the idea, I will try.
 

Offline EHT

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Re: WTB (FR/EU): rear terminals / High voltage board for HP 3457A
« Reply #3 on: September 18, 2020, 10:50:06 am »
I'm interested to know if that works! I have the 44491A and gave up searching for the connector block. I was going to resort to soldering a different connector to the PCB by short flying leads.

I agree that it's very unlikely to pick up any other accessories for this unit, just luck of the draw what comes with the unit you get!
 

Offline Tazz

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  • Country: fr
Re: WTB (FR/EU): rear terminals / High voltage board for HP 3457A
« Reply #4 on: October 24, 2020, 03:36:56 pm »
I've got a 44483A wiring block (for a 44473A / 3488A) for a few bucks. Fit perfectly ! I did not even had to relocate the connector guard key.  :-+
The only difference is the pin labeling.
Thank you !
 


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