Re: TI-H: TI-86 Slowdown problem, more info

To: "TI Hardware" <ti-hardware@lists.ticalc.org>
Subject: Re: TI-H: TI-86 Slowdown problem, more info
From: "David Knaack" <dknaack@geocities.com>
Date: Tue, 3 Nov 1998 22:40:28 -0600
Delivered-To: ti-hardware-outgoing@towerguard.unix.edu.sollentuna.se
Reply-To: ti-hardware@lists.ticalc.org


From: M. Adam Davis <adavis@baladyne.com>
>Measure the frequency of the ripple that the inverter is adding to the
>power supply.  I can see about figuring out the capacitor and
>choke(coil, inducter, etc) that you'll need to filter it out.

Ok, the ripple appears to have a frequency of 15kHz, and
a peak to peak amplituted of about 0.12v.
Not really that big of a ripple, but it sure screws up the calculator.
A 330uF filter cap in parallel with the inverter power leads
reduces the ripple to 0.05v, but doesn't help the slowdown
problem.

thanks
DK

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