Puccini "REMOTE "  version 5.0
 



Unbelivable!

As I've told in the Puccini Remote page, the design is (in my opinion) full of errors; in details:

--- too much power is dissipated on Q113 & Q114 (Q213 & Q214 for the right channel);

--- an FET differential front-end is used else where, causing low GBW and severe DC offset;

--- a wrong (too high) compensating capacitor is used in the feedback path;

--- wrong (too low) driving capacitors are used (1uF instead of 10uF) !
So what are the news ?

Starting from V 5.0 the diagram is changed; in details:

Q113 & Q114 (Q213 & Q214 for the right channel) are no more TO92 case; now they are TO72 metallic case, with a black heath-sink; near them, on the PCB, there are some holes helping the air to flow;









--- no more FET differential front-end is used! Now there is a BIPOLAR differential, made with a couple of BC182B transistors;



--- a right (C155, 470pF) compensating capacitor is used in the feedback path;










 

This is the internal view of the last (As Far As I Know!) Puccini Remote (v 5.0); from the serial number of the studied unit, it seems that this version is up since late 2002.


 

It's clear that "someone" has read my unofficial web pages :-)

That's all, folks.
 
 

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