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Old 25th March 2006, 01:31 PM   #1
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Default First Watt F1

Hi Guys,
I am a complete newcomer to this hobby but would desperately like to build a First Watt F1 for my AKG K1000 headphones. Can somebody tell me how I could go about aquiring PCB's and a parts list for this? I know that a circuit diagram is available for this but how do I go from there?
Any help would be appreciated!!
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Old 25th March 2006, 03:27 PM   #2
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Ah . . . AKG K1000 . . .
I have tried it on a big tube amplifier . . .

I think F1 must be good for it.
By the way, I do not remember whether someone has offered any diy F1 PCB. P2p using perf. board could be an easy alternative . . .

Good luck.
jh
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Old 25th March 2006, 04:59 PM   #3
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Mystical traveller,

i'm also contemplating a First Watt DIY production for the K1000.
Not sure which F anymore as NP is pumping out products faster than i can study them. (i strongly believe NP is doing this on purpose, driving copycats mad once and for all)

With Lovoltech devices distribution well underway i was more thinking of a JFET version for the AKG, and hoping there'd be a GB design coming.
Sort of like figured that to be the last headphone amplifier i will construct, the only unreliable parameter being Master Pass.
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Old 25th March 2006, 08:36 PM   #4
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I think the F2 is meant to be quite a good match with the AKG K1000's as well. Anybody doing a board for that? Either of the F1 or F2 will do for me!!
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Old 26th March 2006, 06:23 PM   #5
acaudio is offline acaudio  Germany
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Default Re: First Watt F1

Quote:
Originally posted by themystical
Hi Guys,
I am a complete newcomer to this hobby but would desperately like to build a First Watt F1 for my AKG K1000 headphones. Can somebody tell me how I could go about aquiring PCB's and a parts list for this? I know that a circuit diagram is available for this but how do I go from there?
Any help would be appreciated!!
Hi,
for PCB design have a look at: http://www.acaudio.de/F1_200.pdf
The original service manual is at www.firstwatt.com available.

Good luck
Adam
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Old 25th November 2007, 05:44 PM   #6
suds is offline suds  India
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Default F1 PCB's

Hi,

I have made PCB from schematic.
Both Power Supply and Amp Boards are ready.

There is difference in size & components size (resistors / Pot )

e-mail me, for further details, I will mail you pdf or PS Board and AMP board.

(Attached is image of AMP Board)
Attached Images
File Type: jpg f1-amp-brd.jpg (69.4 KB, 1893 views)
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Old 1st January 2008, 05:07 PM   #7
suds is offline suds  India
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Default F1 Board prototype Tested..

Final Stage of F1 Amp

Now that I have a working F1 Amplifier.... Observed the following...
(I did not put Heat sink.)

MOSFET becomes Very very Hot.. (Q3 and Q4 Smokes with out heat sink)
Thick Heat sink with silicon paste and insulation is required.

Quality of sound is very good.. !

Instead of ztx550, BC557 is used.
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Old 23rd January 2008, 06:34 AM   #8
suds is offline suds  India
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Lightbulb F1 PCB in Stock

Hi,

I have got F1 PCB's in stock now..
I can mail you actual images, costing etc.
image file is 2.5MB

PCB are FR-4 2.4mm 1/1 OZ
$36 for Stereo Set PCB (Two Amp PCB L & R, and one Power PCB)
$20 onwards , shipping via EMS Speed post.

additional PCB's $13 each

(Add 2% on total value Paypal / Bank charges)

Thanks
Suds
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Old 22nd December 2008, 02:37 PM   #9
suds is offline suds  India
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Default F1 Board, - Modified

Hi,

After I learned about copyright issues,
I modified board layouts.
Added copyright and original Author names.

This board uses Vertical MOSFET, attached is file (pdf) containing layout image.

Authors, please comment on this.. !

(Hope I will be exempted from Moderation after this.)

thanks
suds
Attached Images
File Type: jpg f1-modified-v1.jpg (46.9 KB, 1072 views)
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Old 22nd December 2008, 11:15 PM   #10
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As an example to future efforts, I would prefer to
see something like "F1 DIY CLONE"

The copyright notice is not appropriate, as this artwork
is not mine, it's yours.

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