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Old 6th January 2010, 08:42 AM   #11
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Quote:
Originally Posted by Mooly View Post
Best of all... get the design right and don't use any
That's rediculous.

Sockets aren't for getting the design right or not, sockets exist for a very different purpose.

Cheers!
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Old 6th January 2010, 06:51 PM   #12
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Quote:
Originally Posted by Geek View Post
..... sockets exist for a very different purpose.
Pleas explain the purpose you mean !
Cheers !
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Old 7th January 2010, 03:19 AM   #13
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Hi Max,

Soldering and desoldering on a PCB is hard on the PCB and IC. Sometimes it's beneficial to remove the IC for diagnostics if something breaks down.

Also IC manufacturers are always coming out with "bigger and better" versions of their predecessors. I have stereo EQ's that had they used sockets, I could have easily gone over time from 4558 to TL071 to the new Analog Devices fancy chips out now

Sockets are also useful for "chip rolling". For example, would you buy a tube preamp with a 12AX7 welded to the PCB? Not likely

Physically, the dielectrics are chosen for sockets (other than the real cheap ones) that their properties degrade nothing, especially at audio. Matter of fact, the board pad roughness and lefotover solder flux from desoldering and resoldering straight to the board can and will degrade the connection far worse than using a socket in the first place (I discovered this in an electrostatic audio power amp where impedances are high).

None of these examples involve "prototyping", or "getting the design right", they involve production units.



Cheers!

Last edited by Geek; 7th January 2010 at 03:21 AM.
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Old 7th January 2010, 09:03 AM   #14
Mooly is online now Mooly  United Kingdom
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There is no right or wrong answer...
if you add a socket where one was not fitted before then the HF characteristics of the circuit will be altered, particularly if the surrounding circuitry is high impedance.

As with most things... take them into account in the design and use appropriately and they should be fine.
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Old 7th January 2010, 03:47 PM   #15
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That's enough for me !
Thanks to all for sharing experience !

Cheers
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