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PostPosted: Wed Oct 04, 2017 3:04 pm 
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Joined: Wed Oct 10, 2012 10:07 am
Posts: 100
Location: Repentigny, QC, CA
hello again, Frank.
Out of interest to me, what sort of price are we talking to complete such a diy project (Ok, the big case is alone maybe 200USD$ +)
all the best,
Nathan


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PostPosted: Wed Oct 04, 2017 4:39 pm 
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Joined: Fri Jul 04, 2014 8:37 pm
Posts: 291
Location: Toronto, ON, CA
natedog wrote:
hello again, Frank.
Out of interest to me, what sort of price are we talking to complete such a diy project (Ok, the big case is alone maybe 200USD$ +)
all the best,
Nathan



Hi Nathan,

It has been a while my friend...

For F6 build, roughly around 800 to 1000 something.
Chassis as you mentioned around 300CAD;
Kit plus parts on board around 250CAD;
Power supply (Transformer, caps and etc) 200CAD;
Other miscellaneous 50CAD...

Frank

-- 05 Oct 2017 00:42 --

Power supply..soft start...


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 Post subject: F6 built by UK friend
PostPosted: Thu Oct 05, 2017 5:48 pm 
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Location: Toronto, ON, CA
more pics...


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PostPosted: Thu Oct 05, 2017 9:10 pm 
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Joined: Fri Oct 16, 2009 7:42 am
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Location: Toronto, ON, CA
Very Nice!
Just a few parts questions :
On your power supply bottom portion, I see an EMI filter, toroid, rectifier, I'm guessing the board with 2 relays and transformer is the soft start, and is the green board with 2 caps a DC filter? What is the extra relay for and what is the board with just 2 relays for?

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PostPosted: Fri Oct 06, 2017 4:47 am 
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Posts: 291
Location: Toronto, ON, CA
dazed2 wrote:
Very Nice!
Just a few parts questions :
On your power supply bottom portion, I see an EMI filter, toroid, rectifier, I'm guessing the board with 2 relays and transformer is the soft start, and is the green board with 2 caps a DC filter? What is the extra relay for and what is the board with just 2 relays for?


Hi,

It's not built by me...built "by" a UK friend...the F6 boards and parts were provided by me, and as collecting parts is part of DIY so I got his permission and posted his photos here...hope could illustrate some F6 build ideas...as you can see the UK friend is quite good at building ;-)

Yep, green board with 2 caps is a DC filter...and the board with 2 relays (no transformer) is speaker protection(relay is 12V DC, and I think the board must have some voltage regulator such as 7812 go get 12V DC), and probably some timing circuit.

The path is like this:
AC In ->small transformer (under PSU board) -> 2 caps DC filter board (Green board) -> Speaker protection board

My build was not like this complicated...something like the original factory made F6...simple NTC and fuse, transformer and PSU, F6 amp board, and that's it...

Frank


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PostPosted: Sat Oct 07, 2017 5:15 pm 
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Joined: Fri Oct 16, 2009 7:42 am
Posts: 1406
Location: Toronto, ON, CA
Frank Wang wrote:
Hi,

It's not built by me...built "by" a UK friend...the F6 boards and parts were provided by me, and as collecting parts is part of DIY so I got his permission and posted his photos here...hope could illustrate some F6 build ideas...as you can see the UK friend is quite good at building ;-)

Yep, green board with 2 caps is a DC filter...and the board with 2 relays (no transformer) is speaker protection(relay is 12V DC, and I think the board must have some voltage regulator such as 7812 go get 12V DC), and probably some timing circuit.

The path is like this:
AC In ->small transformer (under PSU board) -> 2 caps DC filter board (Green board) -> Speaker protection board

My build was not like this complicated...something like the original factory made F6...simple NTC and fuse, transformer and PSU, F6 amp board, and that's it...

Frank


Ahh I see. But what is that small transformer for under the PSU? I'm assuming that is the blue box on the board, which I thought was a relay.
That is a lot of extra work with the power supply! NICE!
Sometimes the complication at the power supply side is necessary to get better and more stable voltage delivery to the rest of the circuit.
Even more important the smaller the input signal.

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PostPosted: Sun Oct 08, 2017 4:46 am 
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Joined: Fri Jul 04, 2014 8:37 pm
Posts: 291
Location: Toronto, ON, CA
dazed2 wrote:
Ahh I see. But what is that small transformer for under the PSU? I'm assuming that is the blue box on the board, which I thought was a relay.
That is a lot of extra work with the power supply! NICE!
Sometimes the complication at the power supply side is necessary to get better and more stable voltage delivery to the rest of the circuit.
Even more important the smaller the input signal.


Sometimes, yes, not always...kind of a dilemma actually...
If don't have to, I'd prefer the less/simpler the better - good for the sound, and more stable ... less parts means less chances getting trouble, therefore more stable;
Some circumstances, have to put "extra" safety (don't want blow up speakers and such) ...depends on the design...some designs do not require extra protection...


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