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It is an analog to digital converter from the 4195A. Sent: Wednesday, March 5, 2025 9:32 AM To: [email protected] Subject: Re: [HP-Agilent-Keysight-equipment] HP PN

HP list, I have attempted to assist a current HP list member in Germany with boards from a 8660C. The Post Office is telling me they cannot ship electronics to Germany. (From the US). Parts,

Francesco, From the Keysight parts finder, the picture shows that part number has several discrete components on a circuit board. Three ICs, and numerous R and C. No commercial equivalent but might be

50+ years ago, 400 Hz power supply plugged into 60 Hz source. Runs for a few minutes and then throws its guts all over the bench. Back before the days of power supplies that work from 48 - 440 Hz, 100

Yep, I have seen the fireworks in the lab, too. Been a while, fortunately. More than 25 years ago we had a technician who installed a few tant caps backwards into a VMEbus chassis. Blam, molten

I am trying to find out if there is an equivalent commercial PN to replace an 04194-81803. Thank you, Francesco Ledda

Meanwhile i found a bad (high resistance) hf transistor Q219, located in the amp. It is a MM4018, which is not available. Can I use a 2N5160? This is from the specs a similar type: PNP, 40V,hfe 10,

Thanks to all for the information on the HP-466A! Hope I can help others from my HP experience ('77-'2001).

I have, as listed in the 1994 Options List, an HP-478A-H63, which is spec'd to operate from 100 KHz to 1 GHz and it really does respond that low and lower. It belonged to HP Division 4 (does anyone

Hi David? Thank you found the information so made a new file HP 478A? and put the information in there Regards :Paul

Hey again, Here are the photos. The one with the big blob is the blown one. It does melt with the iron so it's indeed solder. Thanks for the info on possible replacements.

Here are the 478A options listed in the 1994 options list, that is on the web somewhere. David

Re HP 478 A Thermistor mounts could someone –please direct me to a listing of the different options for example HP 478 A - H75 also interested in any one that uses the H75 option Regards Paul

Ok, tgat's good to know. DaveD KC0WJN [email protected]> wrote:

I have a scanned copy.? It's not great, and I don't remember where I got it, but I've attached it anyway... ~~ Mark

Isn’t one solution to side modes using multiple (fiber) loops of different lengths, such that fewer frequencies fit? (Borrowed thinking in terms of laser resonators and etalons where sometimes

The OSCON type capacitors aren’t available in higher voltage ratings. ________________________________ Sent: Tuesday, March 4, 2025 11:30:05 AM To: [email protected]

I'll add that since, in general, modern caps are smaller than vintage caps, make sure the the voltage rating of the new cap provides sufficient margin over the voltage rail. For instance, Tektronix

Arnaud, you can replace Ta caps with alternatives in most applications, so there's no need to spend too much for an original type. Usually ones that burn out are in supply bypassing spots, which are

Mike, No worries, everything I'm doing is at my own risk and expense. I welcome any ideas - Razvan, Jim thanks to you too! Radu [email protected]> wrote: