Electronics > RF, Microwave, Ham Radio

Heathkit IM-4180 Deviation meter

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xrunner:
Thought I'd start a thread on this device. It's a classic Heathkit FM deviation meter. I've never had one, but I've been wanting to get one for a while. I plan on cleaning it up and calibrating it per the original manual. Will be posting more pics when I get it - the one you see here is the one I bought off Ebay, but it's not in my hands yet.  :)

mojoe:
Yes, nice piece of gear. I have one packed away, that I got a few years ago. I've never fooled with it, as soon after I got it, I bought an HP service monitor. Some day, I should dig it out and see if it works. Just curious, how much did you epay for it?

xrunner:

--- Quote from: mojoe on January 24, 2016, 02:45:17 am ---Yes, nice piece of gear. I have one packed away, that I got a few years ago. I've never fooled with it, as soon after I got it, I bought an HP service monitor. Some day, I should dig it out and see if it works. Just curious, how much did you epay for it?

--- End quote ---

$61 plus shipping. I think I got a good deal. I should get it Monday, and I'll first test it to see if it is reading OK, then do a calibration and take some pics.  :-/O

mojoe:

--- Quote from: xrunner on January 24, 2016, 02:47:30 am ---$61 plus shipping. I think I got a good deal. I should get it Monday, and I'll first test it to see if it is reading OK, then do a calibration and take some pics.  :-/O

--- End quote ---

Yes, I'd say you got a good deal. Good luck with the cal. As usual for gear this old, you may need to replace electrolytic caps.

Electro Fan:
Congrats on the Heathkit deviation meter.  In looking for info on the Heathkit in particular and FM deviation meters in general I came across these (maybe not quite the utility and definitely not the cool factor of the Heathkit but maybe interesting):

http://www.rtl-sdr.com/measuring-frequency-deviation-fm-transmitter-rtl-sdr/
http://www.rtl-sdr.com/understanding-fm-deviation-modulation-index-and-sideband-theory-with-an-rtl-sdr-dongle/

http://www.sillanumsoft.org/prod01.htm
http://www.sillanumsoft.org/intoduction.htm
http://www.sillanumsoft.org/new_page_2.htm
http://www.sillanumsoft.org/news.htm

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