Tripath Rb-ta105a

[PH]

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...

P.

 

[Geoff4]

Ta-1050

Hi

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.

Geoff

 

[PH]

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.

p.