Re: Amplifone jitters

Joel,
        I've fixed quite a few of the Ampliphone Deflection boards (GregW -- I
should be shipping them this weekend :-). If your board is a rev "C", then
it has a Y and X gain adjust. It's a low grade adjustable resistor, and
for some reason, it gets noisy. It can be a cause of the jitters. Try
replacing them.

-Scott

At 02:19 PM 6/25/98 -0400, Joel Rosenzweig wrote:
>More Amplifone stuff..
>
>I swapped in a different deflection board last night into the
>Amplifone. The severe jitters are now gone, but a small amount
>remains. It certainly doesn't seem as stable as it used to be, but it's
>quite tolerable. Maybe I'm just being too picky. But I'm a vector nut,
>and a Star Wars fan, and the intersection of the two maybe makes me look
>too carefully at this particular problem. :-)
>
>In any event, now I know that some component(s) on the deflection board
>are out of spec. Anyone have some good guesses as to what it might be?
>
>I'm tempted to replace those 4700uf filter capacitors. Even though I'm
>of the camp that transistors either work, or they do not, I'm somehow
>tempted to also replace the deflection transistors for good measure.
>They are the originals.
>
>Anyone have any better ideas?
>
>Thanks,
>Joel-
>
>

--
Scott Swazey                QUALCOMM Incorporated Work: (619) 657-2419
mailto:sswazey@qualcomm.com V-209H                Pager:(619) 683-5210