Heathkit 10-12 Oscilloscope function test

I just wish I had a "before" picture of this scope I could show. It looked as if it was pulled out of a swamp! A little elbow grease, a couple of new caps and there ya have it. Almost as good as new. These old scopes seem to be fairly bulletproof; not to mention easy to repair. Audio from station WWV Fort Collins Colorado is heard in the background (10mhz)

Category:

Science & Technology

Tags:

• heathkit
• oscilloscope
• lissajous
• ham
• amateur
• radio
• tesla
• crt
• cathode
• ray
• tube
• electron
• signal
• generator
• W7KVA
• arrl
• qst
• qth

[UR3QMQ1]

Так это ведь называется фигуры Лисаажу!!!

[clagwell]

With a proper signal generator Лисаажу (lissajous) figures are easy to make. Thanks for the comment. Your antique radio collection is cool. Keep up the interest !

[NichtDieseTone]

Clagwell, ever wanted to try to hook that up to your teslacoil? TC:s have a very cool waveform full of secondart resonance waves. Use a good resistor and try it; I think you'll find it worthwile.

Oh BTW what happened to your "5 minute fusor" video? And the other fusors for that matter?

[clagwell]

I have been toying with the idea of dusting off the coil and firing it up. Its been sitting for quite awhile now. Your suggestion sound intriging.

At this time I am working on a prototype ion gun. I will post a video on that soon.

Due to a legal issue, I had to remove the video's in question. After some videographical adjustment, I plan on reposting them. It may be awhile due to familial and day job responsibilities.

[clagwell]

I tried your TC / Scope experiment yesterday. Very interesting. Thanks for the suggestion.

[Hamradioismyhobby]

Very Old Screensaver

[RARules79]

It's billed as a 5MHz (AC-only) scope, as I recall. (I built one back in early 1968 when I was 14 years old.) I still have it in a box in my basement. Still works, and is extremely clean. Frankly, not a great scope, but it started me on my EE and CS career. Got a lot of good use out of it. And if we have an EMP in the area, it'll still likely work because it's ALL VACUUM TUBES.

A great use is to put two stereo channels on the inputs instead of a Lissajous pattern. Very entertaining.

[carl95125]

Thats a great scope...I built the same one many years a go...I sorry that Heathkit is not still around. I did not use the scope for much...no function generator..

I have to move to a new house...so my brother toke the 10-12 it to the dump...so sad... 73, Carl K6ZXU

[BanjoKazooieTeam]

wtf is going on in that house o.O

[Nabo00o]

@gmcjetpilot

Ok, to be correct you won't get all the fancy figures he is making there, but you will see the phase angle in a sort of miss-shaped bubble. I believe he is using two different sources (two signal generators), you could then make all kinds of strange patterns by changing their frequency and get the slow-moving motion at or close to their harmonics.

Glad I could help : )

[gmcjetpilot]

@Nabo00o

Oh a RC circuit to change the phase. I have a degree in engineering. Thanks!

[Nabo00o]

@gmcjetpilot

You only need two extra components, a resistor of low value (1ohm) in series with an inductor or cap. If you then place the probe over the entire circuit along with the SG, while the other probe is over the resistor, you get the current versus voltage, and depending on the frequency you will find an interesting 90 degree lag between them.

Of course you can get more sophisticated...

[Nabo00o]

That is really cool. I know this is all standard, but you are removing the time axis and instead adding another input for their relation. You can get so many interesting and weird shapes from that...

Thanks for posting!

[Mrbeast1131]

I have one of those !

[NichtDieseTone]

Mind posting a video? I've only ever seen it done once.