Doug,
This is general question, not specifically regarding the 55110: when
you try to fulfill a contractual agreement, although the spec is
obsolete, you are still comply to the contract and use the old spec as
governing doc and the new doc as guideline. Otherwise, you have to
provide that performance that is not impacted (that is why PRF is issued
instead of STD). Am I correct? It is much easy to dig out the old doc
and comply with it (except one case, I have to ask some B rev from a
customer site.... When the main doc already obsolete), rather than go
through to proof the PRF with no exception... (my 1.41 cents). Based on
my knowledge, a lot of design houses still keep the old docs because of
contractual binding issues (I may be wrong... Please correct
me...thanks.). Mil-specs normally have foot notes, "not comply by new
design" date xxxx--- or somewhere on the doc.
jk
>-----Original Message-----
>From: TechNet [mailto:[log in to unmask]] On Behalf Of Doug Pauls
>Sent: Thursday, July 31, 2003 3:49 PM
>To: [log in to unmask]
>Subject: Re: [TN] 55110
>
>
>To clarify, MIL-P-55110 was originally related to Printed
>Wiring Boards, which is where the "P" came from. In the
>1990s, the move was towards performance based specifications
>rather than product based specifications. The "PRF" you see in
>55110 and 31032 stand for performance.
>
>Doug Pauls
>
>
>
>
> "Blair K. Hogg"
> <blair.k.hogg@GAI-T To:
>[log in to unmask]
> RONICS.COM> cc:
> Sent by: TechNet Subject: Re:
>[TN] 55110
> <[log in to unmask]
> pc.org>
>
>
> 07/31/2003 02:34 PM
> Please respond to
> "TechNet E-Mail
> Forum."; Please
> respond to "Blair
> K. Hogg"
>
>
>
>
>
>
>I'm not exactly sure if this is correct, but the military used
>to use a letter in its specifications corresponding to the
>component type, e.g., Mil-R-6106 for Relays, Mil-M-38510 for
>Microcircuits, Mil-P-55110 for Printed Wiring Assemblies. The
>PRF designation came about as the specs changed to
>"performance" specifications as opposed to specific device
>specifications.
>
>Blair
>
>>>> [log in to unmask] 07/31/03 01:37PM >>>
>Hi Franklin,
>For what it's worth-
>
>MIL-P-55110 Rev D, dated 12/31/84 was revised to MIL-PRF-55110
>Rev E, dated12/31/93. I don't know what the "P" and "PRF" denote.
>
>Regards,
>Mark Hargreaves
>
> -----Original Message-----
> From: Franklin D Asbell [SMTP:[log in to unmask]]
> Sent: Thursday, July 31, 2003 10:23 AM
> To: [log in to unmask]
> Subject: [TN] 55110
>
> Can anyone tell me the difference between
>
> MIL-P-55110
>
> and
>
> MIL-PRF-55110
>
> Have a drawing where MIL-P-55110 is noted.
>
> Thanks
>
> Franklin
>
>
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