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Products => Test Equipment => Topic started by: Justincase1979 on May 16, 2019, 07:55:59 pm

Title: HP 1142A transformer voltage
Post by: Justincase1979 on May 16, 2019, 07:55:59 pm

Hi everyone

Just received a HP 1142A probe power module I bought off eBay, just to discover someone have removed the toroidal transformer... Did get it very cheap, now I know why!

My question is whether anyone know what voltage the secondary is? Maybe someone could be bothered to measure it if they have the same unit?

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Title: Re: HP 1142A transformer voltage
Post by: Jay_Diddy_B on May 16, 2019, 08:49:11 pm

Hi,

The manual is available here:

http://literature.cdn.keysight.com/litweb/pdf/01141-97002.pdf (http://literature.cdn.keysight.com/litweb/pdf/01141-97002.pdf)

The transformer is part number: 9100-4750

The schematic is here:

(https://www.eevblog.com/forum/testgear/hp-1142a-transformer-voltage/?action=dlattach;attach=738168;image)

A transformer that has a 15V secondary is a good place to start.

Regards,
Jay_Diddy_B

Title: Re: HP 1142A transformer voltage
Post by: Justincase1979 on May 19, 2019, 04:24:00 pm

Thanks for the link to the manual, will order a 15v transformer of eBay and give it a try!

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