Bright Watts NI - or a hard gold plate over low stress NI.

Jeffrey Bush
Director, Quality Assurance and Technical Support

VERMONT CIRCUITS INCORPORATED
  76 Technology Drive - POB 1890
    Brattleboro, Vermont 05302
      Voice: 802.257.4571.21 Fax: 802.257.0011
           http://www.vtcircuits.com
 
-----Original Message-----
From: Roger M Unwin [mailto:[log in to unmask]] 
Sent: Monday, May 23, 2005 3:06 PM
To: [log in to unmask]
Subject: [TN] PCB Commutator

Hi Technetters,

Any suggestions for a good hard wearing finish that would extend the
life of 3oz copper tracks being used as a sort of commutator. Am told
that first prototypes were made with chemical (Electroless?) gold over
nickel. Some lasted well, others not so well. Brushes are metal, sorry
don't know the composition. Approx. 5 amps current passes through
connections.

Thank you for your assistance

--
Roger M Unwin
P+M Services (R) Ltd     Tel :  01706 815212    Fax : 01706 818636
Http://www.p-m-services.co.uk

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