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  Heathkit IG-42 Signal Generator Restoration – Part 4 Filed in Heathkit IG-42 on Oct.02, 2018 Cabinet Repair   Front Panel Now the the IG-42 was in good electrical order, it was time to move on to the cabinet repair. As you may recall the cabinet was in a pretty sorry state when I received it.   Cabinet Top – Start   Front Panel – Start I removed all hardware from the cabinet and washed it with soap and water.  Then I used a small ball pean hammer to knock out the dent in the corner to some extent (I’m no body man…)  This was followed by a light sanding with wet/dry sandpaper and water. I then applied a coat of primer to the cabinet and let it dry overnight.  The next day, I found that the primer did not stick very well to the existing paint.  I don’t know if it was the original rough finish, or some remaining grease, or just a mismatch in paint types. I sanded the area again lightly, as before and applied a second coat of primer.  This was a little better, but still no

  Heathkit IG-42 Signal Generator Restoration – Part 3 Filed in Heathkit IG-42 on Oct.02, 2018 Line Cord and Chassis repair — To continue on with the restoration, I replaced the ceramic disk filter capacitors on the line cord input with safety capacitors.  These are designed to fail to an open state, rather than a shorted state.  We hope that they never fail, but if they do, it should leave the chassis safely isolated from the line voltage, regardless of which way the old style plug is plugged in to the wall.   Line Cord safety caps installed Next, I cleaned all tube sockets and switches and potentiometers with Caig DeOxit D5 cleaner.   Caig DeOxit D5 Then I applied DeOxit F5 Fader Lube to the potentiometers.   Caig Fader/Lube F5 I continued with a drop of 3-in-1 oil to the bearings of the variable capacitor.   3-In-1 Oil Once all of this was done, I became aware of the really poor condition of the chassis.  Despite my efforts, it was still pretty dirty and had signs of corr