Please help me identifying these parts

scream314 · Post by **scream314** » 04 Aug 2011, 14:58

The first is a black diode (I tested it, it IS a diode, Vf is about 1,9V), the label is "DLL". (The black brick is known, it is an old Si diode, maybe from the DDR.)
https://imageshack.us/photo/my-images/4/dscf0765o.jpg/

And the others:
https://imageshack.us/photo/my-images/8 ... 0762x.jpg/
https://imageshack.us/photo/my-images/2 ... 0759m.jpg/

The labels are: E500C3, E600C3, E700C3. These may be selenium rectifiers, but I'm not shure. I've never seen anything similar.

Anyone seen these before?

juanro · Post by **juanro** » 04 Aug 2011, 15:22

E600C3 seems some kind of diode, yes:

http://www.oszimuseum.de/cgi-bin/oszimu ... art=E600C3

scream314 · Post by **scream314** » 04 Aug 2011, 16:51

I found that site, thats why I think they could be diodes. But my component tester says "unidentified or faulty device". For all 4 of them.

juanro · Post by **juanro** » 04 Aug 2011, 17:00

Have you seen this one?
http://english.electronica-pt.com/db/cr ... erence.php
Seems to confirm that they're selenium diodes (or rectifiers?) indeed.

Juanro

PS: They could really make for a soft clipping, hard-to-clone TS incarnation, hehe.

scream314 · Post by **scream314** » 04 Aug 2011, 17:11

Whoa, great! I have to find out Vf, and the orientation...

DrNomis · Post by **DrNomis** » 04 Aug 2011, 17:16

scream314 wrote:The first is a black diode (I tested it, it IS a diode, Vf is about 1,9V), the label is "DLL". (The black brick is known, it is an old Si diode, maybe from the DDR.)
https://imageshack.us/photo/my-images/4/dscf0765o.jpg/

And the others:
https://imageshack.us/photo/my-images/8 ... 0762x.jpg/
https://imageshack.us/photo/my-images/2 ... 0759m.jpg/

The labels are: E500C3, E600C3, E700C3. These may be selenium rectifiers, but I'm not shure. I've never seen anything similar.

Anyone seen these before?

I seem to remember seeing one or two of them in an old Tube based Oscilloscope once, they are indeed Selenium diodes, with a PIV (Peak Inverse Voltage) of maybe a couple of thousand volts....