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Old 8th February 2005, 09:02 AM   #1
PH is offline PH  Slovenia
diyAudio Member
Join Date: Jan 2004
Location: SLOVENIA
Default Tripath Rb-ta105a

Hi to all!

I just purchased TRIPATH RB-TA105A evaluation board. It seems that a lot of modifications will be needed;

- input stage (nasty electrolytic cap in signal line)
- output filter (maybe some good foil inductor and better caps...)
- good power supply
- powering-up sequence circuit

Before I go to drawing board I would be grateful for any tipps and suggestions...

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Old 12th February 2005, 07:47 PM   #2
Geoff4 is offline Geoff4  United Kingdom
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Join Date: Feb 2005
Location: Oxford
Default Ta-1050


Certainly the i/p cap needs changing! Ive used the Ta 1040
eval board for some years now and tried a few things. One thing
I did learn from other users who had problems is that the caps for
the o/p filter and zobel must be pretty robust. Ive seen what happens when they fail. I now use pulse rated polyprops!

I used a pretty stiff main supply and a well regulated +5V. I found
that it also benefitted from a good mains filter quite why Ive not yet found out.

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Old 12th February 2005, 09:26 PM   #3
PH is offline PH  Slovenia
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Join Date: Jan 2004
Location: SLOVENIA
Hi Geoff,

I intend to design good low noise input stage, and change all capacitors at output. I taught to use Mundorf's Supreme Silver/Oil caps and foil inductors.
I am still looking for good electrolytics for power supply. I will use 1,5kW toroid 2x64V.

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