HP HP8640B

17 discussions on ElectronDepot about the HP HP8640B: what owners asked, what went wrong, and what fixed it.

What owners report

Larkin, Here's mine...

Larkin, Here's mine... Now show us yours. ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et |...

"Right to Repair"

Lots of smoke, but likely little heat.Yet, got me thinking about what sort of form legislation *might* take.Obviously, you can't force manufacturers to disclose their IP.Yet, you need to make *some* information available to The Public,if...

air-wound inductor Q

I want to make a notch filter at 1 MHz, to pull out a fundamental sine wave and leave the harmonics for THD analysis. The signal levels will be pretty high, maybe 50 mA p-p with some DC bias, so I'd rather not use ferrite cores, in case...

Hearing aid

Contemplating the possibility maybe of doing a very low cost hearing aid. But it's not something I've designed before. The musts: Use mass market off the shelf parts, so it will necessarily be large Decent battery life to keep costs down,...

Mixer as freuency doubler

I=92ve got a mixer from mini-circuits (SBL-3).I=92m using it as a doubler. (RF and LO driven from the same source.)I get some serious asymmetry in the output. at higher frequencies.(The amplitude of adjacent peaks differ by ~25%.)Is this...

Recasting a broken small nylon gear

I needed to repair an Exabyte 8505 8mm tape drive which had a broken 14 toothapprox 3/8 inch diameter nylon gear in the cartridge handling mechanism, andlacking suitable spares, I decided to attempt to reform the gear; this postdescribes...

All discussions