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jblackb26
 Post subject: Old Desk Phones
PostPosted: Thu May 14, 2026 10:01 am 

Joined: Fri Oct 10, 2025 1:48 pm
Posts: 26
Hi,

Would these old phone boards go into High Peripheral or would they fall to Low Peripheral?

Thanks.


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Catwhisker
 Post subject: Re: Old Desk Phones
PostPosted: Fri May 15, 2026 4:16 am 
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Joined: Mon Apr 15, 2024 9:38 pm
Posts: 535
Location: Western Pennsylvania
High Peripheral.
You have no heavy junk. I would remove L1. Also the 2 electrolytic capacitors located to the upper right of L1.
You have plenty of MLCCs capacitors. Looks like gold contacts in the 2 connectors. Just enough ICs.
You squeak just in at High Peripheral.
Here to learn like everybody else.
My evaluations are my own opinion
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austin86
 Post subject: Re: Old Desk Phones
PostPosted: Fri May 15, 2026 9:24 am 
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Joined: Thu Jul 20, 2023 8:30 pm
Posts: 461
Location: Ohio
IMO its a toss up, its close to high peripheral but not quite, not quite low peripheral ether. I would send it in as high peripheral myself.

Catwhisker wrote:
You have plenty of MLCCs capacitors.

Not all MLCCs are equal, if the board is late 90s or newer the MLCCs could be a lower grade. With that 97 date stamp it very well could be using the newer lower grade MLCCs. I think shark has a good video on MLCCs that goes over the differences.
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Catwhisker
 Post subject: Re: Old Desk Phones
PostPosted: Fri May 15, 2026 10:13 am 
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Joined: Mon Apr 15, 2024 9:38 pm
Posts: 535
Location: Western Pennsylvania
I only mentioned the MLCCs with the rational. That the presnce of MLCCs was better than none at all. It is still a close call between High or Low Peripheral.
Here to learn like everybody else.
My evaluations are my own opinion.
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