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dimkasta 15th May 2012 11:14 PM

Yet another F5 building log
I hope you don t mind another vanila F5 building log thread :)

My goal is to eventually build 4 channels to drive my speakers in biamping topology.

For now I have received the F5 and the generic PSU boards from the DIY store, and I am now working on the component list.

So far I have located the F5 parts. I would appreciate it if you had a look at my list

Thanks a lot. I hope I have some more news very soon


6L6 16th May 2012 12:44 AM

Wonderful! I love this stuff, and always want to see how other people are executing their builds!

:) :) :)

oneplustwo 16th May 2012 05:00 PM

6L6 will stalk you until its done. Fair warning from experience. :)

Bring it on! Hopefully I can give back a little from what I've received in my own build thread.

6L6 16th May 2012 08:44 PM


Originally Posted by oneplustwo (
6L6 will stalk you until its done. Fair warning from experience. :).

LOL!!!! :D :D :D :D :D

(It is true, however...)

dimkasta 18th May 2012 08:53 AM

It s good to see people following on such projects:)

Hopefully next week I will order some more stuff... for now, it s just planning (I love to hate that phase... reading and more reading...)

Still trying to decide on transformer size (thinking of 1KVA) and find a relevant good vendor.

For now, I have decided to get the 5U 400mm Dissipante from HIFI2000 (to accomodate for possible turbing of the project :) ).

bear 18th May 2012 12:13 PM

you guys with the square chassis - standard look... let's get wild and crazy!!

dimkasta 18th May 2012 02:10 PM

To be honest I like the 1+2 approach as well... :) really classy and good WAF... and the price is quite nice too... hmm....

6L6 18th May 2012 04:14 PM

Are you thinking of a 1K VA transformer for 2 channels or 4? It's complete and utter overkill for only 2 channels. Very good for 4.

Bksabath 18th May 2012 05:07 PM

Dont mind at all new F5 tread go for it

About traffos I got 1 KvA on mine with 20 and 24 V taps now I wish I had a few more volts

I had a bit of trubles with traffos as poor construction caused same hum
I sent one back and it was resin dipped and most probably the tape over it was retightened no more hum from that.

At the time this is what mighty Zen sugested on MY F5 tread


when I tell to my supplier - " Iwanna300VAdonutwithstaticshield2x18Vacindependent notcentretapped36VacanditwillworkinclassAampwith10 0VAconstantjuice" , he answer : "yeahcorewillbedoublebakednextsizeandwirewillb esom ewhatthickerbutI'llchargejust10%morethanforusuall3 00VAdonutmadeforhalogenbl/i/o/nding"

simple , isn't it ?
at least 'till first time he forget to pass that info to winder

Hope it helps.

dimkasta 18th May 2012 08:02 PM

Oh my god my head almost exploded trying to read this... :D

1KVA overkill for two channels? I am running a 100mA phono with dual 160VA toroids... And yes there is audible difference from smaller ones...

To be honest I was thinking 1KVA per channel.... Perhaps I will also get a 600VA one and compare. I still have to find some decent built ones though...

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