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Old 7th December 2019, 08:15 AM   #1691
Itsmee is offline Itsmee  England
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FirstWatt J2
Thank you Patrick, I won't be buying either - same reason I wouldn't buy the First Watt chassis I have seen in the past; If it had a plain front panel, that would be a different matter.
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Old 7th December 2019, 09:02 AM   #1692
EUVL is offline EUVL  Europe
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Mine has a plain front panel.
You can always ask the supplier.

The one linked by gary s is engraved with "WeiLiang Audio", which is the same as Breeze.
Again, cost nothing to ask if engraving can be skipped.


Cheers,
Patrick
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Old 8th December 2019, 12:30 AM   #1693
EUVL is offline EUVL  Europe
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Someone asked for a larger image of the PCB.
Here you are.


Patrick

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Attached Images
File Type: jpg 191204 J2 PCB.JPG (246.4 KB, 505 views)
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Old 8th December 2019, 05:10 AM   #1694
twitchie is offline twitchie  Canada
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These are the cases I bought. The heatsinks and internal tunnel are the same as Patrick's. The only thing I would ask to be changed is the power switch on the front panel.

3415 all aluminum power amplifier on both sides of a small cooling chassis can be installed Wei Liang JC3 circuit-in Amplifier from Consumer Electronics on AliExpress

I printed out the UMS template and tape it on the heatsinks and punch the holes and drill those on a press. Tapping is the tricky part but it's not difficult.
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Old 8th December 2019, 05:27 AM   #1695
gary s is online now gary s  Australia
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Thanks for the AliExpress link twitchie on that enclosure - much cheaper there than on ebay, but then again that is no surprise these days.

How is the overall quality of the enclosure can I ask. I note your comment on the front panel power switch, I can live with that.

Cheers,

Gary..
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Old 8th December 2019, 10:51 AM   #1696
JeffYoung is offline JeffYoung  Ireland
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Quote:
Originally Posted by EUVL View Post
Someone asked for a larger image of the PCB....
I like those ring connections. Are they just bolted through, or are you using some sort of solder-mounted threaded studs?

Thanks,
Jeff.
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Old 8th December 2019, 10:58 AM   #1697
EUVL is offline EUVL  Europe
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Brass screws and nuts, both soldered to PCB after tightening.
Usual practice for our F5X and F5XP designs.
Not practical for commercial production.
Perfect for DIY.


Patrick
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Old 8th December 2019, 11:09 AM   #1698
JeffYoung is offline JeffYoung  Ireland
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Ahh... so there's another 1/2-height nut under the ring terminal that we can't see?

Very clever solution.
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Old 8th December 2019, 11:20 AM   #1699
EUVL is offline EUVL  Europe
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Full height. No special parts required.


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Old 28th December 2019, 05:46 PM   #1700
woofertester is offline woofertester  United States
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Default J2 variant with IXTH16N50D2 current source

I am looking at the behavior of the IXTH16N50D2 as a current source for a J2 variant. At 24V, the source resistance to give 2A bias is around 0R8. The current is self-biasing with a reasonable tempco.

Would this make sense as the Mu follower current source for a J2? The idea is to skip the need for the opto bias.

I have the SS parts from Euvl's group buy.
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