beautiful and rebuilt HEATHKIT IG-72 Audio Generator. $139 free ship inside continental USA
Here is a Heathkit IG-72 audio sine-wave generator, ideal for testing tube audiophile amps and guitar amps. This is a quality model that has an excellent low distortion sine wave for tube amp testing. And beautiful original cosmetics.
Rebuilt electronics, consisting of:
- new capacitors (including correct orientation of caps regarding foil side of the caps)
- upgraded the 5k-20W resistor to a 50W surface-mounted unit, for cool operation
- meter smoothing capacitor
- many resistors replaced to bring circuit into excellent overall accuracy
- clean sine wave on all frequencies.
- 3 wire grounded line cord installed to meet modern safety standards
I have attempted to photograph the sine wave below. The sine wave looks better in-person than the photos show because my camera has a tendency to bloom the scope trace. (Photography is not my specialty!)
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