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First Watt F3 (please only EU)
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Old 12th September 2019, 07:29 PM   #111
SOelker is offline SOelker  Germany
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Carsten,
thank you very much for taking all the trouble of organizing this GB! Package has arrived safely and looks great! Wonder, how the F3 will compare to my ACA.

Thanks a lot to Jeff and Nelson of course for making all this fun possible!
You fueled my curiosity in all that stuff!

Kindest regards
Stefan
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Old 13th September 2019, 11:02 AM   #112
Shoemaker is offline Shoemaker  Germany
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Quote:
Originally Posted by JeffYoung View Post
I can't wait to start seeing some build pictures....

Jeff, yesterday a heavy duty package full with anodized alumium-parts has arrived. As soon as the PCBs will reach this part of the world, the games will begin .
In the meantime there's some CAD/CAM-work going on, to give the frontplate its characteristic "First Watt"-logo.
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Old 13th September 2019, 12:42 PM   #113
JeffYoung is offline JeffYoung  Ireland
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First Watt F3 (please only EU)
@Shoemaker, I had my front panel laser-engraved thinking it would either be distinct enough on its own, or that I could fill it with paint.

The laser-engraving on its own isn't distinct enough in some lighting, and it's not deep enough to fill with paint. Probably should have had it milled....

Note that this is only an issue for clear-anodised front panels. I've had laser engraving done on black anodising and it looks great.

Cheers,
Jeff.
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File Type: pdf F3-front panel.pdf (8.7 KB, 29 views)
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Old 13th September 2019, 12:48 PM   #114
JeffYoung is offline JeffYoung  Ireland
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First Watt F3 (please only EU)
For those of you using flanged heat-sinks, here's how I mounted my JFETs:

I trimmed the legs to just cover the horizontal distance, and soldered on resistor leads to cover the vertical distance. I super-glued a small piece of brass bar behind the mounting hole to act as a fulcrum:

First Watt F3 (please only EU)-progress5-jpg

From bottom to top: polished heatsink, thermal grease, mica, thermal grease, JFET, fender washer, Belleville washer, cap screw:

First Watt F3 (please only EU)-progress6-jpg

Cheers,
Jeff.
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File Type: jpg progress5.jpg (75.9 KB, 484 views)
File Type: jpg progress6.jpg (93.8 KB, 483 views)
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Old 13th September 2019, 03:09 PM   #115
carsten.witt is offline carsten.witt  Germany
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Six are shipped, nine are on their way tomorrow, final spurt!
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Old 13th September 2019, 07:07 PM   #116
dabore84 is offline dabore84  Netherlands
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First Watt F3 (please only EU)
Also received, thx!!
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Old 14th September 2019, 08:03 AM   #117
carsten.witt is offline carsten.witt  Germany
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Nine was send out, the last one wil be shipped at monday.
The waiting list memebers i will contact in the next days.
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Old 14th September 2019, 09:08 AM   #118
lohk is offline lohk  Europe
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Got mine yesterday. Thank you very much for this GB!
Very nice project, but it must wait until the days get colder and I have more time. But I am searching for heatsinks already.
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Last edited by lohk; 14th September 2019 at 09:25 AM.
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Old 14th September 2019, 09:29 AM   #119
carsten.witt is offline carsten.witt  Germany
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Please take a Look into the BOM.

Edit: First Watt - F3 (clone by Jeff) - Google Docs

Will put it to the First Page also
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Last edited by carsten.witt; 14th September 2019 at 09:32 AM.
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Old 17th September 2019, 09:46 AM   #120
carsten.witt is offline carsten.witt  Germany
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Hi all,

only two sets of pcbs left, if interest please contact me.
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