Decided that in fairness to the THD, s/n thread the IG should be I modified this IG a long time ago — looks like it’s in need of modding. This same upgrade can be performed on the IG, SG-. 18, and incorporated into your kit by Heathkit, depending on when your particular model was sold. Download HEATHKIT IG SINE-SQUARE AUDIO GENERATOR SM service manual & repair info for electronics experts.

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S120222 Heathkit Sine-square Audio Generator Ig-5218

Also, everything shown outside of the terminal reference letters is just extra descriptive info, in a reference layer. However, he heathhkit measured distortion figures under 0. Will be happy to help if you have further questions. September 22, – Reader Comments Posted by Shawn S.

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I hope that using your new IG gives you as much pleasure as using mine has given me. While I find this very surprising, Dick obviously hsathkit done a lot of excellent work on this, so I would hardly question his results.

We would very much like to hear, your results, if you have boards made with the files —ed. If you are not familiar with electronics, do not attempt to repair! Good luck to the repair!

The PCB files package includes:. Thank you, much appreciated.


Thank you for bringing this up! Note that this layout is intended for a single sided board.

Audio Generator IG Equipment Heathkit Brand, Heath Co.;

The Heathkit tuning network uses a The PCB files package includes: You could suffer a fatal electrical shock! These free programs can be found on this page: Larry has kindly generated Gerber files to allow PCBs to be fabricated at commercial board vendors. PCB Created for the Project! They are not suitable for fabricating a topside copper layer on the PCB.

Normally, the leads will be positioned on the opposite side from the lamp —ed. The power supply seems quieter with two 10uF tantalum caps added, across C5 and C6. The board is intended for single-sided, DIY fabrication. Those would be C44,45,48, CR7,8, Ih-5218, Any recommendations for a board fabrication place that will do a run of one single sided hearhkit for a reasonable price.

There is no preview for this item! To open downloaded files you need acrobat reader or similar pdf reader program. Mouser and Digi-key doesn’t seem to carry them.

Eagle version-6 is required to open the.

The schematic and the parts list in the construction notes have been updated to show the CDB as equivalent. Dick has done extensive work on various approaches to enhancing the IG Posted by Steve L. Add your comments here After inspection approve all of them and it will be okay.

While some silkscreen marks may overlap pads, PCB vendors typically mask out the silkscreen over the pads, anyway.


Is there an exact part number or equivalent for the 74C14B? Do you have a part number for the germanium diode? You can heahtkit in English language into the forum not only in Hungarian! Dick also left out C32,46 and R29, though he and Larry think that these last three might be useful.

Remove the B and quite a few places have the 74C Heath’s part number for the diode was which is shown as a 1N in the cross reference table at d8apro.

Assembling the cap board. Note that it will show heaghkit which are harmlessdue to the fact that informational parts of the layout extend past the Eagle zero-reference. PCB Files for Download Click on the image at left, for a high resolution pdf file, showing the silk- screen and topside jumper wires.

That was needed to use free Eagle to create the board. Gerber files for PCB fabrication are provided below.

I must say that the distortion figures seem almost too good to be true under 0. PCB Files for Download. Sadly, Dick passed away in The topside traces shown in the BRD file are only to guide topside jumper installation.