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-   -   Preamp for Power Follower 99 (http://www.diyaudio.com/forums/solid-state/139042-preamp-power-follower-99-a.html)

Ant1Xr1st 21st February 2009 05:28 PM

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.

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:bigeyes:
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 :D
450W off dessipating power :D

Ant1Xr1st 21st February 2009 08:59 PM

2 Attachment(s)
Quote:

Originally posted by Luke
voltage seems kinda high for 100 W, is it +/- 40V, or are you dissipating 800watts per channel:bigeyes:
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 :hot:

Ant1Xr1st 22nd February 2009 11:19 PM

2 Attachment(s)
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


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