Identifying This Diode?
Identifying This Diode?
(OP)
It has a glass case - orange core with blue kathode band
It reads "3" then under that it reads "2c"
From my searches I can only find a "23c2" dual zener diode on mouser.
It reads "3" then under that it reads "2c"
From my searches I can only find a "23c2" dual zener diode on mouser.
RE: Identifying This Diode?
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Identifying This Diode?
Dan - Owner

http://www.Hi-TecDesigns.com
RE: Identifying This Diode?
Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: Identifying This Diode?
I was thinking of just replacing it with a 1n4001 or 1n4148, 1n4149
It's in a power supply for a solid state audio amplifier so I guess it's pretty obvious what it is. I just wanted to figure this code out on the case to find out exactly what these are...
I find it odd to have no way to determine the diode # from the printing on the case.
RE: Identifying This Diode?
RE: Identifying This Diode?
RE: Identifying This Diode?
The supply itself has two rectifier bridges with Ac in(2) and DC + out and DC - out (rs405L)
It has two large filter caps 4700 63V and two smaller caps next to those 4700 35 volt
RE: Identifying This Diode?
Dan - Owner

http://www.Hi-TecDesigns.com
RE: Identifying This Diode?
This particular diode measures 2.3volts anode (+lead of dmm) to cathode (-lead of dmm) and of course with leads reversed measures -2.3volts
This diode connects between the emitter of a pnp (cathode) and the emitter of an npn transistor (anode)which then is connected to the base of another npn then goes through a few resistors eventually leading to a +dc source a ways down the line.
So would this be a switching diode? It seems that way to me.
RE: Identifying This Diode?
Just a blocking diode I think.
Try a 1N4148.
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Identifying This Diode?
----------------------------------
Sometimes I only open my mouth to swap feet...
RE: Identifying This Diode?
RE: Identifying This Diode?
RE: Identifying This Diode?
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Identifying This Diode?
The two diodes grouped together are the 4148's and the smaller one with the thick glass case is the chinese bad diode.
Come to think about it they use g-luxon caps in this thing and the only decent brand of components I see are the ST microelectronics mosfets.
So maybe this is just some diode we have with a cheap junk chinese packaging on it... But regardless, it's great to receive these two diodes from mouser clearly labeled 4148 and then look at the case of these diodes and see "3 2c" maybe it's some code for the all the f grade diodes. (haha)
RE: Identifying This Diode?
Most of the bad diode looks to be glass compared to the 4148's, but it is indeed larger externally. But, the cores could probally be very close to the same size.
I'm just making a guess here, but these might be a higher power version of a 4148 style diode...?
RE: Identifying This Diode?
This isn't design work? Is it?
Or making valuable machinery work so as to save a company?
Is it about getting one piece of junk electronics up and performing again. Isn't it?
Is it really worth all effort?
It is against site policy. That's for sure.
Gunnar Englund
www.gke.org
--------------------------------------
100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: Identifying This Diode?
Just a case variation since the whole thing is just in a "blob-oh-glass".
Since you don't have a schematic and those two look as close as many 4148's I've seen, stick it in and give it a try. That's what you do here on a system that's um, this, ah...cheap.
If it was an expensive, important board you could spend hours actually drawing a schematic, then analyze it. But this board? Just try it. The sooner the better.
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Identifying This Diode?
That's what I plan on doing, accuracy in this section shouldn't be of much importance as long as it serves its purpose. The other transistors near this one are different and look very much like the 4148, but these are slightly different. I am going to sort through a couple different styles and see if I come up with anything closer.
But in the meantime I am going to stick this 4148 in and thanks a lot for all your help itsmoked, macgyvers200.
P.S. It's not really that cheap, it's a nice Klipsch piece, but outsourcing these days...