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Old 21st April 2008, 06:17 PM   #1
Abelma is offline Abelma  Belgium
diyAudio Member
Join Date: Apr 2007
Location: Belgium
Smile Aikido pre and class T amplifier ...for a newby

Hi everybody...My first post in DiyAudio, and already bought the ticket "one way" of this passionate hobby

I have some skills, but I am not a specialist. Not too many tools (No oscilloscope!). I did some class D assemblys kits,and a lot of enthusiam!...and not very good english spoken

Here my project and my first questions.

I have a preamp basic kit of Aikido Octal with 6SN7 Tung-Sol.
Another preamp but pcb only of 9-pins, with the idea to run it with low voltages B+.
I have a class T amplifier with the Tripath chip.

My idea is to isolate the grounds, between the source (Cd player in my case), and between the pre and amp, with a signal transformer. At the same time, take out the caps.

My firts question is for the transformer pre-amp.. Tripath chip has a input biased at 2.5 vdc. Some Lundhal technisiens answer to me that with tha dc bias the transfomer will not have a good freq response.

Well, and then, I have a lot of question about the power supplys !. I've ordered a power supply with tubes LSDY and LS65 from Hong Kong..
I have a switching power supply for the amp also.

Well, looking forward a kind help from others passionates and with more skills than me. Thank's in advance.
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