Hewlett Packard Oscilloscope Model 1740A

I bought a HP 1740A second hand about 15 years ago. It is very good, but has failed on several occasions - usually due to a resistor gone high, but sometimes due to a transistor failure.

The HP parts list gives very scant info on the transistors and ICs. Often they only give a HP part number.

HP don't support this item now and, although I was initially able to obtain some info from Agilent, they have also ceased support.

I have been able to select suitable replacement transistors (based on the limited HP info and guesswork) but I'm concerned about the possible failure of the Y input circuitry and the Y output stage. These are built on what looks like a thick film technology that would not be repairable.

So does anyone know:-

1. where I can obtain a translation list of the HP part numbers to their commercial equivalents?

2. info on the special ICs that have HP part numbers?

3. where I may be able to buy another 1740A or similar that I can use for spare parts?

Any assistance will be appreciated.

Len

Not sure if you have tried this site or not, but they have a pretty good section of cross-reference lists, part numbers, and spares.

https://www.sphere.bc.ca/test/hpparts.html

There are links to Agilients parts database, and other documents as well.

They also sell refurbished and recalibrated equipment.

Agilent has a very nice parts search located here -- http://www.parts.agilent.com/

You can even search by in-house part number.

I could not find any component information on the HP webites whatsoever. Hopefully, it will help you, mate.

Edit: Bah. Shows what I get for not refreshing the page just previous my reply. The link that I gave is at the bottom of the page that zevon8 posted.

Thank you both. I'll try those sites and post the results.

Len