The Heathkit IO-12 5' Laboratory Oscilloscope

This video looks at the Heathkit IO-12 oscilloscope including its history, controls, and a demonstration.

[anonibass]

Compliments for the explanation!! I've seen many manuals on YouTube, but this one stands out! This is 'old school' quality: Informative, accurate, efficient, and it floats like a good story. Very well told, and easy to follow. My Heatkit model is different, but I kept watching the video for it's quality, and the fun of listening to a good technical story. Thank you, Jeff Trenter! Greeting from the Netherlands..

[oliviaphoenix]

In 1962 @ the age of 7 years young My Father and I built this model together

[jacktuber]

Nice video! I'm hoping to learn more about mine. I have a Bell and Howell IOD-4540, I think it can be considered a Heathkit. I need to learn more about all it's functions.

[BitNaptime]

I found an O-12 while thrifting. I guess the I stands for "improved"? They made it look more like a Tektronix.

[qzorn]

very nice scope info... i got a heathkit vector-scope io-101from ebay after cleaning, the unit still works... you-go heathkit... good people.. wished they survived...:/ it is interesting that the rbg color 360-degree circle and the 3-phase voltage/current power 360-degree circle PF/harmonics have some similarities... any videos to explain this? thanks a lot...:-)

[deasename]

Has anyone heard of WAL-JO Scope model IR-1? It has a small round crt display about 2 in it is made in Canada and has 3 6211 tubes and 2 others I can't see NOW and don't want to drain cap but believe they are smaller 7 pins . Thanx

[Very_Dark_Engineer]

nice scope with good tube brightness for aged device. unlike this one old scopes usualy has low catode emission and as result low brightness. no tube - no scope)

[cuse]

Where does the chord go that's plugged into the input thingy? Where does the other end go?

[SDsailor]

Are the scopes use to measure AC signals or DC? are they mainly to measure AC or DC?
Anyone know? Thank you

[vladnickul]

by yourself parts from a real shop not a third party with outrageous prices. the only pio caps that last as "NOS" are ermetic/ glass balloon ones.

[leonarddressler]

My Father Instructed and helped me build a similar model also I was taught how to test tubes and disassemble, repair to acceptable Quality to be used again he was a TV repairman when times were lean In the Automotive Industry 🏭

[Torpengpogi]

hi jeff, i just bought this 10-12 scope from a young guy from kijiji, he said this belongs to his grandpa, sitting for a long time, and he was trying to turn this on,
but nothing happened, his ads asking was $50 bucks but was able to buy it at $20 bucks. i only got a schematic online but no manual or other documentations,
where did you get your partial manual? also do you have a video of your restoration of this 10-12? thanks for any help you may provide, cheers, i'm from toronto.

[videocouk]

I sold my IO-12U around the mid-1990s, it was still working. It was sold complete with the manual which included schematic, the graticule however was missing. The transformer had required rewinding when I first got it, and I suspect that this caused it to have a little more hum on display than it should due to magnetic radiation. I fitted a mu-metal shield around the tube which helped quite a bit. The lack of DC input capability was this unit's biggest weakness. I added a better calibration circuit.

[famossfla]

Thanks for the video on this scope Jeff. I own this same model in good condition. I enjoy saving these old vintage pieces from winding up in the garbage dump.

[MrPageplayer]

1/24/19 Just listed a nice one in auction site and referenced this video.. Great work!

[cmgray]

Jeff, Thanks for the great Video! I still consider myself a novice in electronics but yesterday while at a local HAM festival one of these exact same units followed me home. Someone actually left it next to my car door in the parking lot. It was snowing, at the end of the show, and It had a "free" sticker on it. Anyways your video gave me a clear idea of what I am dealing with and I now have the manual and diagram(located online). So should be a fun project!

[liezeilstra]

Very helpful ! Where did you find the partial manual you mentioned in the video? I can only find the schematics.

[BrokebackBob]

I have an IO-12. Great scope! Great company!

[vhmuc]

I bought that neat clock thing too. When I first hooked it up to x/y, mine was sideways too. I just reversed the inputs from the clock board and scope, and it remedied the issue.

[wmdavis]

Very complete, informative, clear and orderly presentation.