It looks like some kind of glitches from "somewhere". I went crazy for days with a radio to find the signal that sounded like a squeging station was actually from a TV digital set top box. Try the sco

I'd be very wary of tilting the scope face down. Any loose debris inside the CRT may fall to the screen and damage it, either by sticking to it or scratching the phosphor. Don Black.

Assuming the cable has both the active and neutral wires in it (the forward and return current, they will cancel out and there won't be an induced voltage. However you need someone standing by with a

Yay!!! Don Black.

It sounds like a big tunnel diode but I don't really think that's what it is. Don Black.

Hi Asadullah, Heh! You've got my disease, a huge blind spot. You need to use stuff that bites you so you can find it. I don't actually have anything wrong with me, just can't see for looking ;) . If i

The storm is big news here in Australia. We're no strangers to natural disasters and have always had great support and good wishes in such times from America. I certainly hope it's not as bad as predi

Well, you'd get a baby probe for small jobs :) . Don Black.

I know what you mean. Soon be looking for the 7XXX "B" option - Braille. Don Black.

f@@t! Now that's some email address ;0 . Don Black.

Why not buy a pair of cheap Chinese probes for donkey work and keep the good ones for when you need wide bandwidth. I bought a pair of x1/x10 switchable for about $8.00 the pair including delivery wit

I remember seeing an interview with Steve Ballmer of Microsoft years ago proudly saying the more KLOPS (Kilo Lines of Program) they could stuff into their system, the more money they could charge. No

I can't find who has the calculator that needs a new tube but this CRT on eBay no. 150648745385 might do the job. It's short, approximately 30 cm long and doesn't have post deflection acceleration. Wh

Hello Fred, Here's the data sheet. I haven't any experience with this tube but it looks easy to use. I think the blanking plate cuts off or deflects the beam out of the way and wouldn't need to be use

Dennis, how do you change a light bulb? Don Black.

That's easy enough for you to say!! Don Black.

Excellent test procedure. Unfortunately I don't have a 7904. Will it work with any other models? Don Black.

Finger.......no smile. Don Black.

Ditto! Don Black.

And you found out how....? Don Black.