Identifying MA856 diodes

Frequent question abouts LED and other types of diodes.

Identifying MA856 diodes

Postby Miracle Man » 04 Oct 2012, 15:57

Hi!

I was hoping some of the more knowledgeable forum members could help me out. I've been thinking of building a KOT clone recently, and the MA856 diode is obviously very hard to get a hold of. However, I've found some similar looking diodes on an old telephone PCB. Is there any way of identifying these? I'm mostly into modding amps and don't have much experience with pedals :oops: They look like MA856 diodes I've seen in pictures, but I suppose there could be other similar looking diodes. Any help will be greatly appreciated!

Image

Sorry for the quality of the photo, I used my cell phone to take it.
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Re: Identifying MA856 diodes

Postby PokeyPete » 05 Oct 2012, 17:52

Of course I can't identify these as MA856. But looking at a few that I have through a loupe,
I can say that they look extremely similar. Damn, these things are tiny!
Mine have a small black band on the yellow stripe side wire lead, slightly outside the body
of the diode.
“No man is so foolish but he may sometimes give another
good counsel, and no man so wise that he may not easily err
if he takes no other counsel than his own. He that is taught
only by himself has a fool for a master.”
–Hunter S. Thompson
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Re: Identifying MA856 diodes

Postby PokeyPete » 06 Oct 2012, 14:40

I dug up some data sheet info that will compare the size of an MA856 with a 1N914:

.......................1N914.........MA856

Body Length.....3.9mm.........2.2mm
Body width.......1.7mm.........1.6mm
lead thickness.. .55mm........ .40mm

As you can tell, the MA856 is almost half the size of a 1N914. And the leads are only
slightly thicker than a man's mustache hair. These things are very small. I can't tell
the actual size in your photos, but you can compare and make a judgement. I don't
know how many diodes were made in that size with yellow banding. With no markings
it may prove difficult to impossible to ID it with any certainty. It may come down to just
convincing yourself that it "probably" is one, and use it feeling content that you are using
legitimate parts. If you really need to have the correct part, they can be had from
dealers specializing in obsolete electronics, but they do value them highly, if you get
my drift. "Normal" channels of procurement seemed to have dried up, even ebay!
“No man is so foolish but he may sometimes give another
good counsel, and no man so wise that he may not easily err
if he takes no other counsel than his own. He that is taught
only by himself has a fool for a master.”
–Hunter S. Thompson

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Miracle Man (14 Oct 2012, 01:28)
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