I don't think there was ever a GE material--GF and GB were epoxy glass
and GP was PTFE.  You should be able to get a copy of the MIL-P-13949 at
http://assist.daps.dla.mil search on the document number There should
also be a reference to the replacement specification on file as well. 


Jeffrey McGlaughlin, CID 
Engineering Designer 
Battelle 
505 King Avenue 
Columbus Ohio 43201-2693 
(614)424-7582 Phone 
(614)458-7582 Fax 



-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of ekalgren
Sent: Friday, October 26, 2007 3:03 PM
To: [log in to unmask]
Subject: [TN] PCB Material Question

This one should be easy enough for Friday.

 

I've got a drawing calling out the following material:

 

GE062 C2/C2 1A per MIL-P-13949

 

I've worked it out so far to be Type GE 0.0620 thick (they left out a
0),
with 2 oz copper on each side.

 

I can't figure out the 1A.  I think it should be A1 for pits/dents class
A,
and class 1 for thickness tolerance.

 

Does this sound right?  Also, has anything replaced Mil-P-13949?  Is
type GE
material commonly available?

 

Thanks!

 

Eric Kalgren

Electrical Engineer

Cobham Defense Electronic Systems 
Continental Microwave Division 
11 Continental Drive 
Exeter, NH  03833  USA
Tel:  603-775-5200  
Fax: 603-775-5201 
E-mail:[log in to unmask]  
Website:   <http://www.cobhamdes.com/> http://www.cobhamdes.com

 <mailto:[log in to unmask]>  

 


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