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Old 9th October 2008, 12:40 PM   #31
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HI
First of all yes , but the same time I would like use it in bridge mode to get more power .
I don't know if that possible ?
Or the real(better) solution it would be to connect 2 PC board in a X mode .
That would give me more power (min 50W or more not just 16w) per channel .
And if I could modified in a X balanced mode that would receive XLR inputs .I'm going to use my system in balanced mode , I have a AlephX and now I'm in the proces to put together a Aleph2 .
I would drive them from Aleph 1.7 preamp .
For these I would like to ask for help if someone willing to help .
I can post the ProFet schematic if that necessary .
Greetings
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Old 9th October 2008, 12:47 PM   #32
AndrewT is online now AndrewT  Scotland
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it looks like you want bridged mode for more power and balanced input to match your Aleph preamp.
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Old 9th October 2008, 01:23 PM   #33
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HI
Yes Andrew that would be one solution for my inquiry .
Or if is easier to connect 2PC board in a X mode that would be the best solution .
For both method I'm interested , to get more power but the same time I could use it with my Aleph 1.7 preamp in balanced mode .

Greetings
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Old 9th October 2008, 01:50 PM   #34
AndrewT is online now AndrewT  Scotland
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since you are familiar with Pass designs, then look at any of his balanced/bridged schematics that give ~25W into 4r0. This will result in 50W into 8r0 when bridged.

His unbridged schematics can usually be doubled up to mimic the bridged layouts, with the balanced inputs tacked on for compatibility.
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Old 9th October 2008, 02:03 PM   #35
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Thanks Andrew
Any information , I've never sow from Pass Lab any bridged amplifier .
Only the X type .
But for that I need more knowledge , I think it is possible to be done but I will need some help or schematic what can give me some idea .
Greetings
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Old 9th October 2008, 02:27 PM   #36
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He means the First Watt F4.
You can drive two amps in bridge mode straight from the balanced signals without additional inverting gadgetry.
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Old 9th October 2008, 05:04 PM   #37
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Hello
Thank you Jacco . I will take a look how the F4 is working .I will go on and read the F4 at the forum .

Greetings .
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Old 4th February 2009, 02:17 AM   #38
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Can anybody tell me what is GrandMos idle current?
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Old 4th February 2009, 02:44 AM   #39
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Hello
That is one of the next project after the Profet exide all my expect .
I already put the PC boards together for the Grand Mos .
The Profet one of the best amp I ever built at the last 20 years .
Using Caddock resistors , Russian PIO capacitors , silver wire , wonder solder , Exicon mosfets, silver wire made for audio etc .
After that I decided to build the Gran Mos .
The Iq to set up 400mA for the Grand Mos .
Please use large heat sink to avoid thermal run away .
You can share your experience with this amp .
I only can finish at spring time because I need to work a lot on the enclosure .
It is very cold outside to cut and drill etc .
Greetings
I hope I here from you soon .
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Old 4th February 2009, 02:57 AM   #40
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Hello
I want to post a picture from my Grand Mos PC board .
I just need to ad the power mosfet and the driver .
For power mosfet I'm planing to use Class D lateral mosfet , I do not like the new Renesans laterals .
They are not so good than the orig Hitachi was .
That is my opinion after some testing .
Greeting
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