[GreenKeys] Model 33 adventures (continued)

[Jeffrey Golas]

Have you looked at the selector magnet driver board? Theyre usually crispy critters and might need some resoldering.

Also assuming your just using local loop from keyboard/tape - have you tried with any external sources?

Jeff KC3GJX

> On Apr 25, 2023, at 6:52 PM, Jones, Douglas W <douglas-w-jones at uiowa.edu> wrote:
> 
> Last week, I mentioned problems I was having with rangefinder adjustment on my model 33.
> 
> I spent most of the day today in the retrocomputer lab, and made some progress:
> 
> a) The current through the selector magnet was low; I had to turn the trimmer in the CCU all the way to one end to get the current up to 0.5 A.
> 
> b) The tension on the selector magnet armature spring was about 2oz, but the spec says 3 to 3.5oz.  So, I tightened that.
> 
> Net result, it works a little better, but still flakey.  The selector armature is definitely not broken.
> 
>          Doug Jones
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