Analog scope fun

.5uS/div on top and .1uS/div on bottom, rather.

Kik's were OK, but they did the HV layout badly on some of them. Things arced over. I had to replace blown diodes and conformally coat the multiplier section.

Cannot recall ever seeing a multiplier section that *wasn't* potted. Certainly with Tek & HP stuff anyway.

The Tek tube scopes weren't.

Nor the Kiks that I owned.

years ago. :)

Hope its a 100mhz or more Rigol. You will 'see' much more with a higher bandwidth scope. We have a MDO3024 and can see stuff that the old TDS 60Mhz scopes don't show.

Cheers

We seem to be at cross-purposes here, John. I thought you meant C-W multipliers for the plate voltage. I'll get me coat.

It was definitely worth the IIRC $50 I paid for it around 8 years ago; probably the most bang-for-the-buck I ever got out of a piece of test equipment

It has a lot of nice features for what I guess was a "budget"-minded bench o-scope circa 1982. 60Mhz, 2 channel (actually 3 inputs but the third has a fixed sweep), can route the A channel into the B channel so you can display the same waveform at different divisions like the pic, magnification, variable slope, level, and delay time trigger holdoff controls, some analog TV-related features that I don't really understand, and a "z axis" input and freq counter output on the back.

It's very bulky and heavy.

Yup, the DS1102E. Got it on clearance thanks to George H; $299, bargain!

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For a scope with a 6 inch diagonal screen, it is compact and light at only 7kgs. The PDA type CRT has an internal graticule and uses a huge 12kV of acceleration.

Scopes like this are intuitive to use and never give wrong or misleading images of what the input signal consists of or is doing - unlike the cheap, sampling Rigol toy.

Compare the images with it's input linked to the Rigol's and see how often they are very different.

I know which one you can trust.

.... Phil

I took my old 422 and hooked it up to a Magnavox T991. The yoke was almost purely resistive in the vertical. I put that sawtooth into the vertical swe ep. The horizontal not so much, but the scope provided the sweep. Then I pi cked off the video from one of the outputs through a cap, and fed it to the Z axis input. The scope acted as a TV. People were amazed actually, even t hose not so technically inclined.

I really did have some fun when I had my shop.

I heard some story a while ago that you could buy a 50Mhz Rigol (can't recall the model number) for super-cheap money and with just a few tweaks convert it into a 100Mhz scope. So essentially the 50Mhz Rigol was a crippled version of the 100Mhz one. Perhaps someone here can tell me if that was an urban myth or not.

Nope, all true:

Yup, with the Z axis input it could be rigged up to play Asteroids like the vid in this link, but without all the "ghost" traces.

The Kik has a somewhat interesting PSU design, using complementary pairs for the +12/-12 rails, with a PNP in the +12 and an NPN in the -12. Maybe to ensure those rails come up synchronized?

Oops here's the link

There are color LCD replacements for some HP equipment, such as the HP8568A Spectrum Analyzer

and the HP8566A

I'm seriously considering to get one for my 8566A to get rid of the heavy CRT and heat generation.

Digitizing the low frequency waveforms used in SA is easy. But I don't expect to see a LCD replacement for the channel electron multiplier used in the TEK

Just for fun, here is the installation instructions for the color LCD replacement for the 8566/8568:

This explains how they get different color traces by hijacking an unused control. But I'd be happier if they allowed a USB interface instead of the old HPIB one.