1. Home
  2. Electronics Equipment
  3. Need Info/help with a Heathkit Oscilloscope model io 4540

Need Info/help with a Heathkit Oscilloscope model io 4540

Salutations,

I hope someone here on this message board will be able to help me out. This weekend I picked up a Heathkit oscilloscope (model io 4540) at a local flea market for $10. I got it home and powered it and it seems to be operating and functioning properly. My problem is that it did not come with any probes or a manual.

My questions about this scope are:

Is there a specific type of probes that are used with this Oscilloscope, or are they universal? Where can I purchase a set of probes for this Oscilloscope? Does anyone know of a place where i can obtain a manual for it?

Thank you in advance to anyone that can help me ouy.

Ren.

Reply to
Ren,
Loading thread data ...

.

You can buy copies of the manual from

formatting link
or
formatting link 

--
Dave M
MasonDG44 at comcast dot net  (Just substitute the appropriate characters in the 
address)

"In theory, there isn't any difference between theory and practice.  In 
practice, there is."  - Yogi Berra
Reply to
DaveM

the

Thanx for those websites Dave.

Now all I need to do is track down some probes.

Reply to
Ren,

Ren-

As I understand it, there are two main types: direct and low capacitance. (You might also want an RF detector probe.)

The low capacitance probe has a voltage divider with a variable capacitor so you can adjust the division ratio at higher frequencies. Some scopes supply a square calibration waveform for use in adjusting the probe, so the waveform is flat with no peaks or rounded corners.

Such a low capacitance probe must approximately match the input resistance and capacitance of your oscilloscope. Typically you will multiply a reading by a factor such as ten, to find the actual voltage.

If you come across such probes at a Hamfest, there is a good chance they will work.

Fred

Reply to
Fred McKenzie

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.