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So this board is from an old AT&T handset phone. I noticed

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  3. So this board is from an old AT&T handset phone. I noticed
Thread replies: 6
Thread images: 1

Anonymous
2016-07-21 16:16:41 Post No. 1026124
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Anonymous 2016-07-21 16:16:41 Post No. 1026124 [Report]
So this board is from an old AT&T handset phone. I noticed that the dip socket has what looks like these ferrite cores that every pin goes through. Does anyone know why that would be?
>>
Anonymous 2016-07-21 19:10:33 Post No.1026175
[Report]
Anonymous 2016-07-21 19:10:33 Post No.1026175 [Report]
>>1026124
i'm surprised there's even a machined socket in there. those phones were made with anything even slightly unnecessary cut out for cost.

was there even a chip in there?
>>
Anonymous 2016-07-21 19:25:27 Post No.1026177
[Report]
Anonymous 2016-07-21 19:25:27 Post No.1026177 [Report]
>>1026175
Yeah there was. When I get home I can see what it was.
>>
Anonymous 2016-07-21 19:26:54 Post No.1026181
[Report]
Anonymous 2016-07-21 19:26:54 Post No.1026181 [Report]
>>1026177
It also has nichicon caps, so cost wasn't apparently an issue
>>
Anonymous 2016-07-21 22:33:18 Post No.1026234
[Report]
Anonymous 2016-07-21 22:33:18 Post No.1026234 [Report]
>>1026124
> ferrite cores that every pin goes through. Does anyone know why that would be?
probably for signal filtering, blocking outside noise
>>
Anonymous 2016-07-23 03:46:33 Post No.1026863
[Report]
Anonymous 2016-07-23 03:46:33 Post No.1026863 [Report]
it's probably a filter. judging by how old that board looks, I wouldn't doubt the circuit produced significant interference.
Thread posts: 6
Thread images: 1
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