hp 7475a

Frank Gentges fgentges at mindspring.com
Thu Nov 5 21:05:07 CST 2009


While its usefulness is going down, some HP test gear has built-in code 
to drive this plotter to make plots of spectrums etc without having a 
computer involved. For example, I have an HP 8569B.  I also have a 7475B 
with the HPIB interface so I can plot out the screen.

There was a fellow that was selling new pens for HP on eBay although not 
at the present time.  I think they were made by a third party and were 
much fresher than HP NOS pens.  Also, you may be able to adapt current 
writing pens to the plotter but I have not done this.

It is probably worth keeping around either for yourself or for some HP 
equipment owner that can use it.  I have several of these plotters just 
in case......  but then I am a bit of a pack rat.

Frank K0BRA

Alex Fraser wrote:
> Anyone see any value in a HP7475a pen plotter?   I don't have any pens 
> for it, but have the casset.  It runs the demo right nice, but of course 
> only the head wiggles back and forth and there is no plot due to lack of 
> a pen.
> Anyone have a bunch of pens handy?
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