Hello I have a Wa6 like the picture ( above ) and i would like to modify it  like this :     Does someone has a shema with the modifications ?   Thank you   Serge

I would like to upgrade my WA6 :Black gate caps ..... but WOOAUDIO don't give to the public their modifications . Perhaps someone knows it and he has already made changes !!!   Many Thanks Serge

Quote: look at  and buy a Cmoy kit on ebay http://stores.ebay.de/Electric-Sumo?_trksid=p4340.l2563   Serge    

Some News The tests now are done with an AKG 601 .....More details ,more bass ,more dynamic . I have received an AOP from TI OPA 209 . New Classification -1- OPA 209 -2- LT1363 ...... -3- OPA 827 I have just have a problem wih the AKG the treble is sometimes a little bit too...

  Quote: How much DC offset do you get?   With  no Input cap and no 100k resistor Pot =Min Offset = around -7mv Pot =Max Offset = around +7mv     What are your others favourite AOP ?   Thanks for your advices       Serge    

Quote: I don't really understand what do you mean by to avoid DC offset. I 'am using a SALAS Shunt regulation +10,-10v  without Input Capacitor ( 0.1µf ) and it seems to be good ... Today the  best results are two LT1363 and the SALAS Shunt Reg ...   Serge    

Bonjour   Linear Technoloy is very dynamic with the samples . One week ,Maximum two weeks and you receive your samples .   Is not the same song with NS   Well the LT1364 is a very good AOP better for me thant the 2134 !!!!! I have one LT1364 ( DIP )  i can send it to you ( I live...

Thanks for your advices .   are you compensating the opamp? Sorry i don't understand what do you mean . Serge  

B]This weekend some tests with OPA827 and OP1641[/B] No the tests are Today !!! And the winner is ....... OPA827 For the moment the best AOP are LT1028 and OPA 827  always with the Shunt Reg. by SALAS The best AOP for this application and for me Serge

  I did some tests with LM317 and LM337 regulators . One LM317 and one LM337 for each AOP .( Two single AOP ).   The results are :Where are the bass and the dynamic ? I have no more fun listening to my CD Probably:errors implentation ,bad capacitors choice ....... If you have any...

With the gain to 5 is better .   Now i prefer the LT 1028 .   I have made some tests with two 9v batteries and two 4700µ 25v FC Panasonic . I am surprised Instruments tonality have changed   Have you suggestions about the power supply ?   Thanks Serge    

LT 1028:   There is always a souffle in the headphone and a little noise at the beginning of the potentiometer . The gain is around 2 perhaps is not enough !!!!!   lt1028 isnt really that keen on low gain dixit QUSP in a last post   What is the best solution ,increase the gain or...

I need advices about the shema attached with LME49600 Do you think that the shema is correct ? Thanks Serge  

  Yes LT not LTC .....   what gain have you set ? ( 1+11.5/10.5 k ) ~ 2 Today I have  received two samples from TI :THS3121 SO-8 The best for the moment .... for my configuration .... Next step : a CI for two LME49600 with a double AOP ( DIP8 ) or two single AOP ( SO-8) Serge

Today i am "disapointed" .... with the LTC 1028 there is less dynamic but in French in the text !!!!! le  son est plus  aérien , moins crispé ,les voix semblent moins en avant  ,moins fatiguant à l'ecoute ( si quelqu'un peut faire la trad en English)   Serge