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)
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)
luvdunhill said:
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.
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. 😕
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. 😕
fredlock said:
Peter Daniel said:
Maybe should run it by Papa in the F5 thread.
http://www.diyaudio.com/forums/showthread.php?threadid=121228&goto=newpost
You have mail
Hi Peter,
You have mail for 2 F4 boards and 2 F4 power supplies. Also really excited about F5 boards.
Pathmark
Hi Peter,
You have mail for 2 F4 boards and 2 F4 power supplies. Also really excited about F5 boards.
Pathmark
Variac said:
You can always couple both FETs with piece of copper or aluminum epoxied to the cases. But is it really needed? Doesn't seem like it was done in the original amps (either F4 or F5)
Payment sent for:
2 x F3 amp
2 x F3 PS
(PS: I know they are pairs - i want four channels)
Regards
Henrik
2 x F3 amp
2 x F3 PS
(PS: I know they are pairs - i want four channels)
Regards
Henrik
F5 amp board came out pretty nice; I've always wanted to build Pass amp smaller than a GC and this time it may a case. Mounting the PCB on a high efficiency CPU cooler, the actual amp can be smaller too, and I will be certainly building one.
So here's the deal: a pair of F5 amp board is exactly half size of a pair of F4 amp PCBs. Technically, the price should be cut in half, which comes to $7.50 per two channels. If only one set is ordered, shipping would be another $2.50, which comes to $10 total. When 2 sets are being ordered (4 channels), the total would be $15 shipped, not bad at all, and sometimes small size has its advantage 😉
However, I feel a bit guilty offering those boards at such low price, that could also lead to situations when people order much more than really needed and some of those boards may end up in questionable offerings interfering with Pass trademark.
So, another possibility would be offering them at the same price as other boards ($15/set) and the additional amounts would be donated to diyAudio forum: that means $5 from each pair or $15 from dual sets (less 4% my paypal fees). Let me know your thoughts.
In a meantime, you may post your interest in a WIKI which has been expanded for F5 option. F5 PS is exactly the same as F4, but for clarity reasons (as I already ordered F4) it's marked as F5 PS: http://www.diyaudio.com/wiki/index.php?page=FirstWattPCBReissues
Below, F5 compared to F4 (one channel ea.)
So here's the deal: a pair of F5 amp board is exactly half size of a pair of F4 amp PCBs. Technically, the price should be cut in half, which comes to $7.50 per two channels. If only one set is ordered, shipping would be another $2.50, which comes to $10 total. When 2 sets are being ordered (4 channels), the total would be $15 shipped, not bad at all, and sometimes small size has its advantage 😉
However, I feel a bit guilty offering those boards at such low price, that could also lead to situations when people order much more than really needed and some of those boards may end up in questionable offerings interfering with Pass trademark.
So, another possibility would be offering them at the same price as other boards ($15/set) and the additional amounts would be donated to diyAudio forum: that means $5 from each pair or $15 from dual sets (less 4% my paypal fees). Let me know your thoughts.
In a meantime, you may post your interest in a WIKI which has been expanded for F5 option. F5 PS is exactly the same as F4, but for clarity reasons (as I already ordered F4) it's marked as F5 PS: http://www.diyaudio.com/wiki/index.php?page=FirstWattPCBReissues
Below, F5 compared to F4 (one channel ea.)
Attachments
F5
Peter,
I think that a mandatory donation via you is a great idea, built into the price.
I would also consider limiting what people can buy, for IP purposes. Maybe 3-4 stereo sets.
I have ordered more than needed sets since I am occasionally careless with a soldering iron, or like the shorted FET that melted the last F4 board i needed to make the monoblocks go.. .
Peter,
I think that a mandatory donation via you is a great idea, built into the price.
I would also consider limiting what people can buy, for IP purposes. Maybe 3-4 stereo sets.
I have ordered more than needed sets since I am occasionally careless with a soldering iron, or like the shorted FET that melted the last F4 board i needed to make the monoblocks go.. .
I am wanting in on the F5 PCBs as well. I figure that since they all use the same transformers I could roll amps, so to speak. I am also in for the idea of a "donation" as well. I think that it should be equal fair for single and pairs so why not $15/$25 or $12.50/$20? I am wondering if this violates Mr. Pass's principles on not profiting of his clones?
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