I would like data on RCA 399-4,D330,D194 3 and 416-1
Transistors.

 

I found a cross that lists 2SD525 as the substitute for an RCA 399-4

See if it appears to be like the one you have, in a TO-220 package

http://html.alldatasheet.com/html-pdf/270251/SAVANTIC/2SD525/383/1/2SD525.html

 

Here's a link to the NTE sight: NTE

Type in your part numbers into the crossreference search box.

I believe they all have hits.

 

hi,

i bliv SD330 has been discontinued, KSD1943 is from Fairchild, is the SD416 in a TO3 casing?