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Rating: 2 votes, 4.50 average.

First Watt F5 Amp build

Posted 27th January 2012 at 01:53 PM by dvb projekt
Updated 8th January 2014 at 07:17 PM by dvb projekt (Project finished)

After reading so much over this amp, i will start a new project for my Hornspeaker

Letīs see if the F5 can play in the same league as my 300B monoīs



The parts


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Schaffner FN 2070 - 3A multistage EMI Filter



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Antek AS-4218 - 400VA transformer



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SST03 Softstart module from Sjostrom Audio
Design without extra transformer


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RFB03 rectifier bridge from Sjostrom Audio

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with IXYS DPG 60 C 200 HB HiPerFRED diodes



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PSU with Mundorf 22.000ĩF/40V M-Lytic AG caps
and Mills MRA05 resistors



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diyaudio amp pcb with
PRP PR9372 & Mills MRA05 resistors
For R9, R13 & R14 witch are in the signal line, i choose Texas Components TX2575 resistors.
For P1 & P2 i choose Vishay 1240 bulk metal foil pots, ordered also at Texas Components.



Here is the design for the 3U front and back

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The mechanical work

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The transformer, rectifier bridges, soft start module and EMI Filter are on their places


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Just a quick look with the psu in the 2nd floor



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Starting internal cabling with Kimber TCX cable for the PSU.


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Fitting test on the heatsink


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The back panel with WBT & Furutech looks cool...



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Cabling completed !

Audio Cable: Kimber PBJ
Speaker Cable: Kimber 4TC
Mains cable: Supra LoRad



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Bias setting for the 1st channel


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Finished internal overview


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Now itīs time to burn in...





Attached Files
File Type: zip Front- & Backpanel .fpd files.zip (4.2 KB, 29 views)
Views 8166 Comments 13 Email Blog Entry
Total Comments 13

Comments

  1. Old Comment
    And once again you beat me to it.... I am planning (already for some months) to build an F5 as well. Actually I have decided to wait for F5Turbo as I don't have such sensitive speakers....

    What made you decide to go F5 instead of F4 (I remember you have a B1 as preamp?) ?
    permalink
    Posted 30th January 2012 at 08:59 AM by studiostevus studiostevus is offline
  2. Old Comment
    dvb projekt's Avatar
    Thatīs correct. I have a DCB1 hot rodded in my rig.

    If the F5 doesnīt beat my 300B monoīs, i will use him for my next project, the Auridux.
    Itīs a direct coupled Tube Amp for my Stax SR-404 Ltd. headphone and here i need some voltage gain

    The pcb is ready for month on my Harddisk:

    Click the image to open in full size.
    permalink
    Posted 30th January 2012 at 09:35 AM by dvb projekt dvb projekt is offline
    Updated 30th January 2012 at 09:42 AM by dvb projekt
  3. Old Comment

    Awesome

    Fantastic buiding quality !!
    Congrats...
    Where do you get the round illuminated switch ??
    Thanks.
    permalink
    Posted 25th May 2012 at 09:17 PM by ct1agi ct1agi is offline
  4. Old Comment
    dvb projekt's Avatar

    Awesome

    Quote:
    Originally Posted by ct1agi View Comment
    Fantastic buiding quality !!
    Congrats...
    Where do you get the round illuminated switch ??
    Thanks.
    Sorry for the late reply!

    Iīve ordered the switch at Conrad Electronics.

    Best regards,
    Oliver
    permalink
    Posted 6th July 2012 at 11:08 AM by dvb projekt dvb projekt is offline
  5. Old Comment
    wlowes's Avatar

    You are an artisan!

    How does it sound relative to the 300b. I expect it is excellent, but hard to compete with the 300?
    permalink
    Posted 14th October 2012 at 03:39 PM by wlowes wlowes is offline
  6. Old Comment
    dvb projekt's Avatar

    You are an artisan!

    Quote:
    Originally Posted by wlowes View Comment
    How does it sound relative to the 300b. I expect it is excellent, but hard to compete with the 300?
    Thatīs correct. It is also a personal taste and depends on your rig.
    The F5 is a absolute wonderful sounding amp. Fast, extreme clear and natural in every way.
    In my rig the 300Bīs points with their miracle mellow midrange presentation.

    permalink
    Posted 20th October 2012 at 09:19 AM by dvb projekt dvb projekt is offline
  7. Old Comment
    Beautiful looking amp ! What size are your heatsinks ?
    permalink
    Posted 22nd January 2013 at 05:29 AM by thor61 thor61 is offline
  8. Old Comment
    dvb projekt's Avatar
    Quote:
    Originally Posted by thor61 View Comment
    Beautiful looking amp ! What size are your heatsinks ?
    Hi thor61,

    thanks for your comment!

    The two heatsinks per side are 20x12mm, so 40x12mm complete.

    You could find the case in the modushop online store Part No: 1NPDA03400B.


    permalink
    Posted 22nd January 2013 at 07:10 AM by dvb projekt dvb projekt is offline
  9. Old Comment
    Hi there - I notice you are using the Sjostrom rectifiers. What is the PSU PCB you are using? I would like to achieve a similar layout in the F5 I am building with the 2-level design

    Thanks, lhalha
    permalink
    Posted 2nd June 2013 at 06:51 AM by lhalha lhalha is offline
  10. Old Comment
    dvb projekt's Avatar
    Quote:
    Originally Posted by lhalha View Comment
    Hi there - I notice you are using the Sjostrom rectifiers. What is the PSU PCB you are using? I would like to achieve a similar layout in the F5 I am building with the 2-level design

    Thanks, lhalha
    The PSU PCB is from Jims Audio Store.

    Please look if it has still the same GND layout failure!

    Cheers,
    Oliver
    permalink
    Posted 11th June 2013 at 05:47 PM by dvb projekt dvb projekt is offline
  11. Old Comment
    Wow, this F5 looks really good !
    Also very well chosen components.
    I have the same 3U enclosure like you and would like to pimp up the looks, cause I now have a 'blind' frontpanel.
    Would you be so kind to share the backside and frontpanel .dwg or .fpd files?
    permalink
    Posted 8th January 2014 at 08:15 AM by WalterW WalterW is offline
  12. Old Comment
    dvb projekt's Avatar
    Quote:
    Originally Posted by WalterW View Comment
    Wow, this F5 looks really good !
    Also very well chosen components.
    I have the same 3U enclosure like you and would like to pimp up the looks, cause I now have a 'blind' frontpanel.
    Would you be so kind to share the backside and frontpanel .dwg or .fpd files?
    Hi Walter,

    thatīs no problem. I have attached the files for downloading!

    permalink
    Posted 8th January 2014 at 07:18 PM by dvb projekt dvb projekt is offline
  13. Old Comment
    Thanks !!!!!! Schaeffer-AG will soon have some work to do
    permalink
    Posted 14th January 2014 at 05:16 PM by WalterW WalterW is offline
 
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