HP HP-85

10 discussions on ElectronDepot about the HP HP-85: what owners asked, what went wrong, and what fixed it.

What owners report

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John LarkinHighland Tech Glen Canyon Design CenterLunatic Fringe Electronics

LTspice Loafing?

I was running some simulations on LTspice and it is not even using 5% of my CPU. Nothing else is topping it and the entire computer is pretty much at idle. What could be limiting the speed? One of the main reasons I bought a laptop with...

GPIB board drivers for Solaris

Are there any freely available GPIB board drivers for Solaris using a National Instruments PCI based GPIB board?They are on the National Instruments web sitebut are not free - in fact, the drivers at £395 are slightly more expensive than...

GPIB board drivers for Solaris

Are there any freely available GPIB board drivers for Solaris using a National Instruments PCI based GPIB board?They are on the National Instruments web sitebut are not free - in fact, the drivers at £395 are slightly more expensive than...

Lead Acid Car Battery

I'm charging the battery on a vehicle that has been sitting for a while and it was down to zip voltage. I put a power supply on it and ran up the vol tage until the current was at 2 amps. As I watched the battery voltage dro pped and the...

Rubber idler wheel rubber restoration

I've been volunteered to resurrect a Gerard A75 turntable and a Sony250 reel to reel tape deck.Both the turntable and tape recorder have rubber idler wheels thathave turned hard as a rock. Is it possible to soften the rubber withsome...

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