On 5/1/2015 10:11 AM, Mark Wendt wrote:

>> I think I probably have one, but so far I like it a lot. Partly
>> because it is small enough to transport by motorcycle.
>> It's a 336 (picture of one here: http://www.komu.jp/DSCN0837B111.jpg )
>> with on-screen menus and storage and all sorts of other things that
>> must have cost a fortune when new.

> Cute little scope.  I was actually thinking of the 2400 series which has a
> chip called out on the schematics as U800.  Heat degradation does most of
> those in.  The guys on the Tekscopes mailing lists have taken to installing
> computer heat sinks on them to increase their longevity.  About the only
> place you can get the chips is from other parts queens.

For one Hewlett Packard 8007A pulse generator a broken and irreplaceable 
pulse shaper chip was reverse engineered and a scratch built circuit 
made to replace it.

http://hackaday.com/2014/04/21/rebuilding-a-custom-ic-saves-hp-pulse-generator/


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