[ARC5] manual for a hp 428

[Roy Morgan]

On Aug 23, 2010, at 7:06 PM, james aschenbach wrote:

>
> can any one tell me where I can get a down load manual for a HP 428  
> current meter

The issue of the HP Journal that describes the 428B is at:
www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1961-11.pdf
This article tells the differences between the A and B model (A: 3ma  
to 1 amp, B: 1 ma to 10 amps. and the B has low frequency AC scope  
output ).

a later article on a new probe for sensing magnetic fields with the  
instrument can be found at:
www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1963-03.pdf

Roy

Roy Morgan
k1lky at earthlink.net
K1LKY Since 1958 - Keep 'em Glowing!