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F6 Amplifier
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Old 29th March 2013, 02:23 PM   #4051
kiven chen is offline kiven chen  China
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The new schedule, PCB has been completed.

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Old 29th March 2013, 05:08 PM   #4052
buzzforb is offline buzzforb  United States
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Kiven,
Be careful of pinout

Glas I decided to fire up bias arrangement first. Hadnt noticed board layout issue. All corrected now and will soon be moving forward, after lunch.
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Old 29th March 2013, 05:11 PM   #4053
Antoinel is offline Antoinel  United States
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Quote:
Originally Posted by buzzforb View Post
Kiven,
Be careful of pinout

Glas I decided to fire up bias arrangement first. Hadnt noticed board layout issue. All corrected now and will soon be moving forward, after lunch.
Go for throttle up.
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Old 29th March 2013, 06:33 PM   #4054
Nelson Pass is offline Nelson Pass  United States
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Quote:
Originally Posted by kasey197 View Post
With the higher transconductance parts in the upper half ?
There are three possibilities. I will do all three, and listen to each with a
different wine.

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Old 29th March 2013, 06:45 PM   #4055
kiven chen is offline kiven chen  China
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Quote:
Originally Posted by buzzforb View Post
Kiven,
Be careful of pinout

Glas I decided to fire up bias arrangement first. Hadnt noticed board layout issue. All corrected now and will soon be moving forward, after lunch.
Thank you for your remind:
I think, the output near the feedback sampling resistance is better, the power near MOSFIT is also better. Isn't it?
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Old 29th March 2013, 07:08 PM   #4056
flocchini is offline flocchini  United States
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Quote:
Originally Posted by Nelson Pass View Post
There are three possibilities. I will do all three, and listen to each with a
different wine.

All Cabs?
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Old 29th March 2013, 09:46 PM   #4057
generg is offline generg  Germany
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Quote:
Originally Posted by Nelson Pass View Post
There are three possibilities. I will do all three, and listen to each with a
different wine.

I donīt have three different wines.....and only one upper and one lower place...

you are privileged.......
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Old 3rd April 2013, 03:24 PM   #4058
kiven chen is offline kiven chen  China
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May be a wiring problem,one channel 20MHz Self-excited, negative feedback 100 Ohm resistor in parallel with a 100P small ceramic capacitors are normal. Another channel is fine.
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Old 3rd April 2013, 10:57 PM   #4059
Zen Mod is offline Zen Mod  Serbia
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sounds good

did you made first listening yet ?
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Old 4th April 2013, 03:37 AM   #4060
danielutzu is offline danielutzu  United States
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I'm confused - why do you guys balance the F6 by mirroring everything? I mean, the transformer used for phase splitting could be fed a balanced input (you'd maybe need another set of Q3/Q4 and some resistors). Is there an intrinsic advantage to the fully-mirrored design, instead of having the distortions cancel ea. other out in the same transformer? I could see it in the case of the BA3, but the F6 transformer design is intrinsically balanced. Am I missing smtg?
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