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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The new topic will begin with this message. I’ll presume for now the 2N is working OK and move on. And closer inspection shows you’re right that it’s not B In this case the device is connected to a large pad on the On Mon, Oct 8, at Also can anyone make use of some fast switching diodes and other parts?

Are you sure you wish to delete this message from 2n1593 message archives of TekScopes groups. I’ll bet the B in B is an 8 and if so is a date code. Search Only Within This Topic.

2N Datasheet PDF –

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 can post some dattasheet scans of the relevant schematic parts if datashedt would help.

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 is derailed by the positive shift at Q base and doesn’t recover.


This cannot be undone. Will check my box of scraps. Q’s Tek part number for my ‘s serial number isfor which Sphere lists 2N as eatasheet substitute. If you had a spare lying around it would be good to have one available. Substituting a 2NG for the B hasn’t made any difference. Subject of the new topic: The Group moderators are responsible for maintaining their community and can address these datasgeet.

Silicon PNP Power Transistors

My eyes are not what they used to be. Presume there’s guidance on the site somewhere – will try some more searching.

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. 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.

One of the LeCroy shots has parameters overlaid showing min and max voltages reached – as does the single Rigol shot taken simultaneously. I hope that will shed some more light.


So the problem seems to lie on the power supply board. I’ve started to compare how the -9V and -5V supplies are behaving as the first appears to be working fine and the second is not and they’re not very 2m5193 subcircuits and use the same op-amp.

Hardware shot simply shows the Motorola circled red. Biggest challenge is finding enough time to do the diagnostics. Seems that’s the way it should be. Hopefully this will help with interpretation of my earlier msg.

2N5193 Datasheet

Your email is included with the abuse report. Reed Dickinson toggle quoted message. The photo titles show the channel allocations to the rails.

The soldering does not look original.

Use a mica washer when mounting on a metal surface. 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. Reason Report to 2n51193 I think this message isn’t appropriate for our Group.