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MICROELECTRONICS. 2N/91/ 2N/94/ COMPLEMENTARY SILICON POWER TRANSISTORS. 2N, 2N, 2N AND 2N ARE . Characteristics of the 2N bipolar transistor. Type – p-n-p; Collector-Emitter Voltage: 40 V; Collector-Base Voltage: 40 V; Emitter-Base Voltage: 5 V. Manufacturer Part No: 2N Order Code: Technical Datasheet: 2N Datasheet. Availability: No Longer Manufactured. See all Technical Docs.

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2N Datasheet PDF –

The photo titles show the channel allocations to the rails. Are you sure you wish to delete this message from the message archives of TekScopes groups. I’ve been unable to find any datasheet on this item and don’t know whether it’s original or a substitute from an earlier rework. Also can anyone make use of some fast switching diodes and other parts?

Reed Dickinson toggle quoted message.

Will check my box of scraps. I’ll presume for now the 2N is working OK and move on. The Group moderators are responsible for maintaining their community and can datawheet these issues. I hope that will shed some more light. There’s also one expanded timebase shot from the LeCroy showing the U op-amp output into the base of Q and its correspondence with movements on the -5V rail, which starts its downward trajectory but dxtasheet derailed by the positive shift at Q base and doesn’t recover.


So the problem seems to lie on the power supply board.


If you had a spare lying around it would be good to have dahasheet available. As far as I can tell U and Q are behaving as expected but I can find no bad passives on the -5V supply sub-circuit. I’ll bet the B in B is an 8 and if so is a date code.

I have plenty of photos and waveforms from diagnostics so far but I’m not sure how to upload them or link them to this post.

Reason Report to Moderators I think this message isn’t appropriate for our Group. Search Only Within This Topic. Seems that’s the way it should be.

My eyes are not what they used to be. And closer inspection shows you’re right that it’s not B Your email is included with the abuse report.

2N5193 Datasheet PDF

Hopefully this will help with interpretation of my earlier msg. Hardware shot simply shows the Motorola circled red. I can post some annotated scans of the relevant schematic parts if 2n55193 would help.

Q’s Tek part number for my ‘s serial number isfor which Sphere lists 2N as a substitute. In this case the dataheet is connected to a 2n51993 pad on the One of the LeCroy shots has parameters overlaid showing min and max voltages reached – as does the single Rigol datsaheet taken simultaneously. I’ve started to compare how the -9V and -5V supplies are behaving as the datasheer appears to be working fine and the second is not and they’re not very dissimilar subcircuits and use the same op-amp.


On Mon, Oct 8, at Biggest challenge is finding enough time to do the diagnostics. Presume there’s guidance on the site somewhere – will try some more searching. Subject of the new topic: The soldering does not look original. Use a mica washer when mounting on a metal surface.

At present, I’m just looking for advice on whether this part of the supply is particularly sensitive to the characteristics of Q, details of what the full identifier for the Motorola B might be and where I might find a datasheet, and advice as to whether the 2NG is a suitable replacement and, if not, what to use instead. This cannot be undone.

Substituting a 2NG for the B hasn’t made any difference. The new topic will begin with this message.