General > Buy/Sell/Wanted

FS: (eBay) Vintage HP 35 Scientific Calculator

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danielbriggs:
Not quite the latest and greatest tech!
But I know some people on here like calculators :)
So I'm selling an old HP 35 if anyone is interested in it.

Unfortunately it won't power on with the included PSU.

https://www.ebay.co.uk/itm/113127035187

I undid the back to have a look for any obvious signs, couldn't find much so put the back back on.
But check out that 1970's tech!


Will post worldwide at buyers cost.

Cheers,
Dan

bd139:
Added to watch list :)

Repaired a few of these for people.

retrolefty:
You should have little problem selling that as HP RPN calcs are very collectable and even as a parts donor it has value.

glarsson:

--- Quote from: danielbriggs on July 03, 2018, 10:10:10 pm ---Unfortunately it won't power on with the included PSU.

--- End quote ---
Isn't the HP 35 one of the calculators that are destroyed if the charger is connected without a working battery?

bd139:
No it should be fine if you do that. I ran an HP35 without a battery for ages.

Usually one of the power supply caps goes short and pops a diode. There’s a little SMPS in the unit.

A lot of people think this is a beyond repair situation but a 1n4148 and a modern tant can be substituted in.

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