- 2026
- Jan
- 27
Checking out some recent acquisitions - #5 - More odd Heathkit stuff.
This is a Heathkit IG-5282, an audio signal generator that goes along with the IB-5281 bridge. There’s a post about the bridge here: https://wereboar.com … -odd-heathkit-stuff/ if you’d like to read it.
This device is in the same series, and comes in the same blue case, same dimension, same everything save this one has the correct molex connector for the power input.
Inside, the entire chassis is shielded, but comes off with two screws.
While I haven’t pulled a schematic, one expects this to be a generic weinbridge device. The circuit board, of course, exhibits the magical orange “T” indicating the raw board was made in Ohio.
Does it work? Let’s put some batteries in and see. This requires 2 9V cells or a power supply, just like the bridge. One of the things I noticed here and didn’t notice on the other, is that there are places on the bottom of the case to hold the battery snaps down so they don’t fly all over the place. That’s pretty neat.
Let’s power things up.
You can see by the sinewave on the scope that it indeed does work. The dial indicator doesn’t match the output at all, so yeah. Whatever. It seems to go from about 7Hz to near 120kHz, with the top clipping a bit when driven hard.
To get square output, you turn on the sine then turn on the square on the front panel, as the square output is derived by shaping the sine. It’s accordingly lower in value and frequency:
It seems stable and works as prescribed, even if the output is a bit weak in the amplitude department. Ok, another piece of odd equipment for the bench, a non-line powered generator may have some uses.
One more piece in this set, and then we’re on to other things. Stay tubed!
Next part of this series: Coming soon.
Previous part of this series: https://wereboar.com … -odd-heathkit-stuff/