Diode type PG1992 ?

John Crane

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Jun 27, 2021, 12:08:02 AM6/27/21

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Anybody know where to get these or can recommend a replacement?
I can't even find it in my data books, so I don't know the specs.

It's in a late 1970's PC-100A thermal printer base for TI calculators.

-John

Sergey Kubushyn

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Jun 27, 2021, 1:22:26 AM6/27/21

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https://www.weisd.com/products/884837-pg1992-nte-equivalent-nte519-ultra-fast-switching

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abrsvc

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Jun 28, 2021, 7:11:06 AM6/28/21

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I have 8 of these in stock if you need 1 or more...
I am in the US and can mail these out.

Dan

dansabr...@yahoo.com

abrsvc

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Jun 28, 2021, 7:14:07 AM6/28/21

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Clarification: I have the ECG 519 parts in stock. --Dan

John Crane

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Jul 11, 2021, 2:18:06 AM7/11/21

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I ordered some NTE 519 diodes, compatible with the PG 1992
Sealed in package... but the markings on the components are 1N4148
Apparently these are compatible too!

-J

Rob

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Jul 11, 2021, 5:26:04 AM7/11/21

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Well, that is about the most common diode around. Apparently it
was nothing special.
(which can be more or less expected in a device like that)

Hopefully you did not pay more than a few cents a piece plus the
shipping/handling...

amdx

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Jul 13, 2021, 8:31:43 AM7/13/21

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I didn't realize it but a 1N4148 is listed as a fast switching diode.

That begs the question, how fast? I suspect it will be fast enough

for a 1970s thermal printer base.

Mikek

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John Robertson

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Jul 13, 2021, 11:33:47 AM7/13/21

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On 2021/07/13 5:31 a.m., amdx wrote:
> On 7/11/2021 1:18 AM, John Crane wrote:
>> On 6/26/21 11:07 PM, John Crane wrote:
>>> Anybody know where to get these or can recommend a replacement?
>>> I can't even find it in my data books, so I don't know the specs.
>>>
>>> It's in a late 1970's PC-100A thermal printer base for TI calculators.
>>>
>>> -John
>> I ordered some NTE 519 diodes, compatible with the PG 1992
>> Sealed in package... but the markings on the components are 1N4148
>> Apparently these are compatible too!
>>
>> -J
>
> I didn't realize it but a 1N4148 is listed as a fast switching diode.
>
> That begs the question, how fast? I suspect it will be fast enough
>
> for a 1970s thermal printer base.
>
> Mikek
>
>

Reverse recovery time is 4ns "when switched from IF = 10 mA to IR = 60
mA; RL = 100 Ω; measured at IR = 1 mA;" Philips data sheet, 1999.

John :-#)#

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