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Repairing the Audio Oscillator section in my B&K Mod. 970 Radio Analyst, which has a bad 16L64 NPN transistor. I'm not able to find a replacement.
Any help is more than appreciated.

Note: Revised and corrected. The Transistor number is 16L64 NOT 16L46 and it is a NPN NOT a PNP. I'd like to apologize to every one for my mistake.
I found the schematic and will using the instrument for repair.

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All i'm getting in search for that are light bulbs. Are you sure that is what it says on the transistor? – Marshall House Apr 22 '12 at 4:52
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Do you have a schematic? Picture of the transistor? If you're trying to get running again, as opposed to historically-correct restoration, we can probably find a modern replacement. – markrages♦ Apr 22 '12 at 7:12
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A picture is needed as the case style can help us look for the replacement. Digging through my ECG 1996 cross reference book, we have 16L42, 43, 44, 62, 63, and 64. No 46. However, they are all cross referenced to the same replacement and it's an NPN transistor. Are you sure it's a PNP? Since it's bad you can't use the typical multi-tester method of determining the type. The schematic is needed instead, detailing which pin connects to which (importantly ground). Please provide those and I can give you the specs and modern replacement parts. – shimofuri Apr 22 '12 at 12:38
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@RayPalmore - If you found the schematic, please post it! That may allow us to make better estimations of the required parameters for the part. – Kevin Vermeer Apr 23 '12 at 5:25
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@shimofuri - I removed the tags "part-search" and "part-replacement" you created. Think twice before creating new tags. Before you know we'll end up with "part-allocation", "part-soldering", "part-testing" and what more. – stevenvh Jul 28 '12 at 5:35
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1 Answer

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Using NTE's cross reference, 16L64 can be replaced by NTE107 which is described as a "Silicon NPN Transistor - UHF Oscillator for Tuner" and comes in a TO-92 package. As the exact copyright status of NTE literature is unknown to me and to avoid any copyright issue, I will not be posting the specifications here. Instead, here is the link to the datasheet.

If you are in the US, you can check for availability of the NTE part using the "Check Stock" button. I highly recommend buying from NTE to support their business. They had been providing good cross reference service for decades (formerly known as ECG by Philips).

Other common transistors for replacement are 2N3855A and BC549. A preferable replacement from Fairchild is KSC388.

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WARNING: Before installing the replacement, make sure that the pins are in proper orientation. Please check the datasheet and review the schematics. – shimofuri Apr 23 '12 at 9:55
This will surely solve my problem. – Ray Palmore Apr 23 '12 at 17:28

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