Preamp for Power Follower 99

Ant1Xr1st · 21st February 2009, 05:28 PM

I'm have finished building the "Power Follower 99" (5Abias , 81v, 100Wrms)

Now i'm looking for trasistor or tube (maybe) "voltage preamp" for it (or how it's called on eng.)
*Sorry 4 my eng. Tnx.

PMA · 21st February 2009, 07:44 PM

I wonder what kind of cooling system you have used. Heat pipe?

Luke · 21st February 2009, 08:08 PM

Thats dissipating 800watts per channel

How many outputs and can we see pics of this amp and maybe a schematic:-)

Ant1Xr1st · 21st February 2009, 08:59 PM

Water cooling system, Thermaltake waterblocks & pump and ProModz 360x120mm radiator

450W off dessipating power

Ant1Xr1st · 21st February 2009, 08:59 PM

Quote:

Originally posted by Luke
voltage seems kinda high for 100 W, is it +/- 40V, or are you dissipating 800watts per channel
How many outputs and can we see pics of this amp:-)

This scheme has "virtual ground operation" and uses +81v input, but in rezult, it have +-40.5
If there is a 800watt of power, mofets will burn

Ant1Xr1st · 22nd February 2009, 11:19 PM

Shematic is in attachment. Case type - TO247. Every mosfet's gate have a feerite "bead"
What with the preamp scheme? Could you give me some?

GoranB · 4th March 2010, 09:21 AM

maybe you already built an preamp for power follower till now, im useing andrea's pre amp with tubes. It sounds great on midrange and high, bass is not controled well. I can sugest you to connect PF 99 to direct source, you'll get the best results that way

GoranB · 9th March 2010, 06:28 PM

Maybe here you can find some interesting sschematics for your power follower (tube designs)
HeadWize - Project: Top-Level OTL Tube Headphone Amplifier by Andrea Ciuffoli

21st February 2009, 05:28 PM	#1
Ant1Xr1st diyAudio Member Join Date: Feb 2009	Preamp for Power Follower 99 I'm have finished building the "Power Follower 99" (5Abias , 81v, 100Wrms) Now i'm looking for trasistor or tube (maybe) "voltage preamp" for it (or how it's called on eng.) *Sorry 4 my eng. Tnx.

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21st February 2009, 07:44 PM	#2
PMA diyAudio Member Join Date: Apr 2002 Location: Prague, Kitakyushu, Fukuoka	I wonder what kind of cooling system you have used. Heat pipe?

21st February 2009, 08:08 PM	#3
Luke diyAudio Member Join Date: Sep 2001 Location: Wellington NZ	Thats dissipating 800watts per channel How many outputs and can we see pics of this amp and maybe a schematic:-)

21st February 2009, 08:59 PM	#4
Ant1Xr1st diyAudio Member Join Date: Feb 2009	Water cooling system, Thermaltake waterblocks & pump and ProModz 360x120mm radiator 450W off dessipating power

4th March 2010, 09:21 AM	#7
GoranB diyAudio Member Join Date: Mar 2010 Location: Poland	maybe you already built an preamp for power follower till now, im useing andrea's pre amp with tubes. It sounds great on midrange and high, bass is not controled well. I can sugest you to connect PF 99 to direct source, you'll get the best results that way

9th March 2010, 06:28 PM	#8
GoranB diyAudio Member Join Date: Mar 2010 Location: Poland	Maybe here you can find some interesting sschematics for your power follower (tube designs) HeadWize - Project: Top-Level OTL Tube Headphone Amplifier by Andrea Ciuffoli

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