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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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Assembling the cap board. Maybe you know the feeling—so many toys, so little time: Dick also left out Heeathkit and R29, though he and Larry think that these last three might be useful.

Any help would be greatly appreciated. These free programs can be found on this page: Larry has kindly generated Gerber files to allow PCBs to be fabricated at commercial i-5218 vendors.

If you want to join us and get repairing help please sign in or sign up by completing a simple electrical test or write your question to kg-5218 Message board without registration.

Note that red topside traces are only to guide topside wiring. PCB Files for Download. I hope that using your new IG gives you as much pleasure as using mine has given me.

S120222 Heathkit Sine-square Audio Generator Ig-5218

Also, Being a project nut, I have several small footprint toroidal transformers on heathkir. Sadly, Dick passed away in Posted by Shawn S. Any help would be appreciated. Any recommendations for a board fabrication place that will do a run of one single sided board for a reasonable price.


Audio Generator IG Equipment Heathkit Brand, Heath Co.;

The drd file is excellon drill data. Hearty congratulations on completing the project! The PCB files package includes: The topside traces shown in the BRD file are only to guide topside jumper installation. I must say that the distortion figures seem almost too good to be true under 0.

Note that this layout is intended for a single sided board.

It was a pretty easy job and is accurate. The board is intended for single-sided, DIY fabrication. Please, do not make a copy of the downloaded manual and do not offer to sell it, just use personally to repair defective appliance!

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I looked at the NTE replacement but it’s not a very good characteristic match. The Heathkit tuning network uses a If this is the reason, announce it with the blue man icon on the top and I remove it. Also some files are djvu so you need djvu viewer to open them. Pot R54 1kohm is added, in series with R After inspection approve all of them and it will be okay. The diode I actually used which worked well came from Radio Shack more than ten years ago and was an unmarked Germanium, as I recall.

It would be worthwhile during checkout to disconnect it at transformer end to see if it is adding anything, especially on the high value range resistances.

Do you have a part number for the germanium diode? Before doing this project, I had gone through previous iterations of “greening” the critter, beginning way back in the seventies with an article from the Audio Amateur. This file is downloadable free of charge: Add your comments here Now when I use it, I recall how it used to waver around the final level and change level across the bands.


I wish they would indicate that on the “obsolete” page. The PCB layout, as seen in Eagle is at left.

We would very much like to hear, your results, if you have boards made with the files —ed. However, inhis wife Robin graciously allowed Tronola to preserve his website, Moorepagewhere you can find more information. Shame I don’t have the time or patience to figure out how to mod the file.


PCB Files for Download Click on the image at left, for a high resolution pdf file, showing the silk- screen and topside jumper wires. Also, everything shown outside of the terminal reference letters is just extra descriptive info, in a reference layer. The way HP’s excellent circuit just locks right in on the level heathjit almost magical in comparison. You can write in English language into the forum not only in Hungarian!

His write up on it is here. For readers who want to fabricate the PCB, Larry provides the following tips edited and augmented:. Hi Ueathkit, Those turned out to be interesting questions indeed!

New range switch with cap board mounted. The write-up is in the form of what I call construction notes, which is brief.