Salut MossFed
I have applied always bias gate voltage first to the SIT's.
Your DEF sound nice despite camera or phone microphone quality of the sound recording.
The next step is DEFYourSIT advanced version ? 😀 Let's dance
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Joined 2009
Paid Member
Clarification
Still in the entry level not advanced like yours.
Please consider that my home brew is just only an approach to SIT-3, by NSQC (non sound quality component) such as using an RF SIT, a power toroid transformer as gain stage... and a loudspeaker found from a dumpster.
So, fewer words: “it is not an SIT-3”.
YouTube
Still in the entry level not advanced like yours.
Please consider that my home brew is just only an approach to SIT-3, by NSQC (non sound quality component) such as using an RF SIT, a power toroid transformer as gain stage... and a loudspeaker found from a dumpster.
So, fewer words: “it is not an SIT-3”.
YouTube
Sensational ! Let's see what inside of the original First Watt SIT-3
6moons audioreviews: FirstWatt SIT-3
Photo courtesy of 6moons huge thanks for superb article 🙂
6moons audioreviews: FirstWatt SIT-3
Photo courtesy of 6moons huge thanks for superb article 🙂
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You really sound like an angel, your Antek info is like a very bright bulb jus lighten in my brain, I am building a special power supply for the Bi-Circleton, still can’t get close to the target, now your info enlighten me, it was designed with an audio toroidal transformer with ES shield. Problem solved.
This SIT-3 toroid has more than an ES shield.
Thanks for the PDF’s.
A magnetic shield and an ES shield, whoa the way to heaven is closer!
Thats possible reason why this time little Cinemag's are in the corner without mu metal protections.
Useful to know not every Antek have shields incorporated
Greetings
Useful to know not every Antek have shields incorporated
Greetings
You will notice that the sticker on the back sez "pilot run".
I built 10 amplifiers to test the uniformity of the design and also provide
some initial samples. They have the same sonic performance as
production, but have a capacitor glued to the bottom of the board
and a couple small layout changes.
You see that Srajan had the good taste not to show the underside of
the board.
😛
I built 10 amplifiers to test the uniformity of the design and also provide
some initial samples. They have the same sonic performance as
production, but have a capacitor glued to the bottom of the board
and a couple small layout changes.
You see that Srajan had the good taste not to show the underside of
the board.
😛
was looking at new pages on phone , while sittin' on Kiddoe's School Parent meeting ...... trying to zoom and see footprint for missing caps
anyway , grades are impeccable , both at Kiddoe ..... and Papa sides
🙂
anyway , grades are impeccable , both at Kiddoe ..... and Papa sides
🙂
Nice to see that even Nelson must match the transconductance of the IRFP240 with different parallel Panasonic 3W resistors fitting to the SIT.
In one case 2x 0R47 and in the other picture 2x1R.
Or?
:--))
In one case 2x 0R47 and in the other picture 2x1R.
Or?
:--))
so, it's easy ;
all you need to have is :
-brain
-mileage
-wit to use that brain
-practically unlimited stash of adequate parts
-brain to use that wit
-well cared sense of humor
-brain
.......
all you need to have is :
-brain
-mileage
-wit to use that brain
-practically unlimited stash of adequate parts
-brain to use that wit
-well cared sense of humor
-brain
.......
Thats possible reason why this time little Cinemag's are in the corner without mu metal protections.
Useful to know not every Antek have shields incorporated
Now I have a good view of the photo with large screen.
Wander to know which scenario is happened first:
A) Mr Pass had bought a truck load of Antek double shielded toroids.
B) Mr Pass had bought a truck load of CineMag unshielded transformers.
Cheers
You are looking at early boards, not actual production, which has not
yet left the factory.
Actually, the match is for Vgs, not transconductance in order to trim the
bias current. Originally I tried to get as close a Vgs as possible, in an
effort to reduce the resistive degeneration, but then I developed a
technique to retain the "square law effect" independent of that.
Could that elusive cap glued to the bottom of the board be a bypass for the IRFP240 source resistor ?
