Help IDing a transistor

[deaconque]

I got a few of these in a grab bag on ebay.  They have no markings on them and I can't get them to register on my DMM.  Anyone got any ideas of what they might be?

[caress]

i've seen those in a russian made wah...

[Solidhex]

Yo

  I've usually seen Darlingtons in that package. Does your DMM have an Hfe setting? If there's a limit to its Hfe measurement and these are Darlingtons they might be exceeding the limit and producing no reading. Set up a test jig like the one RG Keen suggests in his article on the fuzz face and you can use your DMM to test the gain that way.

--Brad

[deaconque]

it does have an HFE setting but i don't know what it's limit is.  r u talking about RG's rig to test for leakage?  if so, how would that help me?  it could also be that i had the pinout wrong too, even though i tried every conceivable option.

[Solidhex]

it does have an HFE setting but i don't know what it's limit is.  r u talking about RG's rig to test for leakage?  if so, how would that help me?  it could also be that i had the pinout wrong too, even though i tried every conceivable option.

Your transistors are unmarked therefore you won't ever find out exactly "what" they are. They're not in a transistor package that is unique to any one transistor type as far as I know. The only thing you can do to find out what they will be usefull for is to check whether they're PNP or NPN and what their gain is. I've seen 2n5306's in that package as well as other Darlingtons. Their pinout is usually emitter , collector, base from left to right with the flat side facing you.

--Brad

[dxm1]

it does have an HFE setting but i don't know what it's limit is.  r u talking about RG's rig to test for leakage?  if so, how would that help me?  it could also be that i had the pinout wrong too, even though i tried every conceivable option.

You could go on groping in the dark, guessing the pinout, or you could use the 'Diode' checker on your DMM (assuming that it has one) and try this:

http://www.allaboutcircuits.com/vol_3/chpt_4/3.html