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Old 11th December 2008, 02:15 PM   #121
jims is offline jims  United States
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Thanks

What about signal output ground?

JimS
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Old 11th December 2008, 02:25 PM   #122
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Supply grounds and output ground are referenced to PS ground.

On amp board, there are only two ground pads: one for input signal ground, the other to run the wire to common connection on main filter caps.

This is exactly same setup as with F4 amp boards; also for balanced configuration you would need 4 of those boards (two per channel)
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Old 11th December 2008, 02:36 PM   #123
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Quote:
Originally posted by luvdunhill
could you not more R1 and R2 to the left then rotate Q1 and Q2 so their faces can be coupled together? you have to move the ground, but looks feasible.
I tied it, but it didn't work out well. Besides, the whole thing is so tiny that trace length one way or the other is rather negligable.
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Old 11th December 2008, 02:48 PM   #124
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Peter,

Would that be the same balance configuration/connection that mithomas had shared to us for the F5? If not, can you share it to us.
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Old 11th December 2008, 02:56 PM   #125
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I would assume, it's the same configuration.
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Old 11th December 2008, 03:03 PM   #126
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Quote:
Originally posted by fredlock
Peter,

Would that be the same balance configuration/connection that mithomas had shared to us for the F5? If not, can you share it to us.

Quote:
Originally posted by Peter Daniel
I would assume, it's the same configuration.

Maybe should run it by Papa in the F5 thread.
F5 power amplifier
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Old 11th December 2008, 03:56 PM   #127
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payment sent for:
1x F3
1x F4
1x PS F3
2x PS F4

thanks for the group buy,

Robert
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Old 11th December 2008, 04:58 PM   #128
MikeW is offline MikeW  United States
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1 set for F3
1 power supply
Payment sent
Thank you Peter
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Old 11th December 2008, 05:01 PM   #129
Variac is offline Variac  United States
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Quote:
I tied it, but it didn't work out well. Besides, the whole thing is so tiny that trace length one way or the other is rather negligable.
I thought that the issue was thermally coupling the two by strapping them together
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Old 11th December 2008, 05:04 PM   #130
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Default You have mail

Hi Peter,

You have mail for 2 F4 boards and 2 F4 power supplies. Also really excited about F5 boards.

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