TSP #16 - Teardown and Repair of an HP 8648C Synthesized Signal Generator 

+Michael Katt You are welcome. :)

+George Tsiros My father worked at a medical research company were they would on rare occasion throw electronic equipment away like this. Eventually they started either donating or sent it to recycling.

or someone was stealing it and get it later.

Oh god no, lol. He wouldn't do anything like that. You'd have to be a pretty low person to steal from the place you work at or steal anything for that matter

I was referring to someone else, I meant no disrespect to your father or family. I too work at a technological park and yes good things get tossed in the dumpster.

You're good man, no disrespect taken. I thought you might have been talking about someone else so I didn't take it to heart. Thanks for double checking though :)

+ScribblesOnNapkins The melting point of hotglue is often lower than the operating temperatures you will see on heatsinks.

+ScribblesOnNapkins 100 k? LOL

Dude, you are revealing the fact that you didn't even watch the video in its entirety.

dBm; decibels relative to one milliwatt (.001 Watt). So, 0 dBm = 1 milliwatt.

Try using Google.

You look for the side connected to the negative on the bridge rectifier.

Ah Ha. Just what I thought.

2OQP The solder joint must have been compromised before the cap dropped. No matter what inertia a cap this size can have. I suspect more that the 'drop' must have started to compromise the solder and then arcing became possible and so forth.

2OQP are you having a great conversation with yourself?

I'm happy with mine too. They just feel like high quality, and the rotating handle ends are a nice touch.

It's a bit old. Maybe they bought a newer device.

And why would you do that?

OneCoolDude08 And yet you comment like a little girl.

@@daverhodes382, Be a bit more kind, TSP has made so many basic errors in this video that it is embarrassing. No need to rub it in.

Bruce Nitroxpro Do you realize that you are leaving a comment on a video that is 6.5 years old? Do you honestly think that I don’t or didn’t know how a switching power supply works? Or that I don’t know how the instrument is built and used? While we are always in a continuous mode of learning, some comments are just silly and unnecessary.

@@Thesignalpath, I apologize for not considering your learning curve. I DID NOT note the time span and do not doubt your technical ability. It was the particular video which compared your methods to that of a switching power supply specialist. I'm sure you wouldn't do things that way again now. de KQ2E

@@Thesignalpath I was perusing the comments here just to see if they are as asinine for an excellent technical presentation by a master that this one is as, they often are for other videos on RU-vid. And then I see the one by Bruce Nitroxpro, which made me a bit sad, as it confirmed my fears. Clearly, the Dunning-Kruger effect is at work in this case. Of all the people on RU-vid, you could count on one hand the number of them that have your knowledge and depth of understanding of Electrical Engineering, especially RF. I don't understand the motivation of people that need to belittle others, let alone when it is they that don't know what they are talking about. In my assessment, you are THE MAN when it comes to engineering excellence and understanding in these types of videos. Hopefully this can balance out a little of the crap that others leave in the comments, and thanks so much for your fantastic videos. Don't stop, and just ignore the bozos that leave those sorts of comments, as they know not of what they speak.