[R-390] R-390 Slugs

[Anthony Casorso]

Thanks Cecil,
Don Heywood dug up an old thread from here that had the dot code info in it and sent it along to me. That thread also mentioned the R-390 engineering report which I had read a few years ago. Unfortunately, my memory doesn't work all that well these days. I went back and read it again and the information is on page 54. The core materials were made by Stackpole carbon (misspelled as Stockpole Carbon in the report) and three variations were used in the R-390. The s100a material was used in the 8-16Mhz and 16-32 Mhz RF transformers as well as the 9-18MHz VIF transformers. The S-62 material was used in the 4-8MHz RF and the 3-2MHz VIF. The S-51 material was used in the .5-1, 1-2, and 2-4MHz IF. The color dot codes would be yellow for the S-51,  red for the S-62, and blue for the S-100A. The thread said that the color code may only apply to early production. 
Thanks to both of you for the help. Maybe we can get another receiver put back together correctly.


All the best,
Tony Casorso