Hi Michael
At 07:49 AM 2/11/2014, you wrote:
The RICM needs to repair a S603 triple pulse amplifier
flip-chip. The
failed diode is listed as a DEC D-664. The DEC enthusiast cross-reference
lists show it as a 1N3606. These diodes are nearly impossible to find. Can
someone recommend a substitution for the 1N3606 diode?
Michael Thompson
--- The DEC schematic for the S603 does indeed list 1N3606 as equivalent to the D664. I
found complete info on the 1N3606 in the GE 1964 Transistor Manual pp.439-446, pp.564-565,
p.587. It does have some special processing, including gold doping and controlled forward
characteristics. A couple parameters which stood out are:
- Reverse recovery time: 2ns (nanoseconds--some sources show microseconds, woof)
- Forward voltage 0.55Vmax at 0.1mA, 0.67Vmax at 1mA.
Note that some of the online data listed for this part is misleading or wrong.
Though lesser diodes would probably work, no doubt you would prefer to replace it with one
at least as good, for the sake of preserving the integrity of the restoration.
Anyway, I found that the 1N3606 is claimed to be available:
Qty-61 shown here. Price is $1.54ea:
http://www.ralphselectronics.com/SearchResults.aspx?criteria=1N3606
This source shows Qty-173 in Irvine, CA:
http://partsearch.area51esg.com/icswdl2.aspx?user=area51&user=area51&am…
New Jersey Semiconductor claims Qty-1424:
http://njsemi.com/product-request/
There were other sources, if those don't pan out.
Steve L.