sorenb

4n25:you have 'diode' (A->C) from 6->4 and 6->5, and 1->2, also see the datasheet feedback is missing and servo is missing input, as it is no longer comming from the output board 8mA for driver and somewhere >20mA for output board depending on your heatsink and crazyness I guess ;o) I use 18AWG but don't see why 20AWG should be enough though using 240V (2x250VA+210VA) using 2.5TA on each

or a simple circuit with a trimmer/transistor and a couple of resistors and you can dial in the brightness...not much to it...

might be worth a read

Yes, current adjustment. Feedback moved back to driver board.

Thanks 呂 宏曉 ... got it from your Paypal payment

Yes

Update CAPs GROUP BUY: sheet Price is confirmed 12USD/ea: 680uF/550V Please make your payments (according to the sheet (doesn't include shipping, will be added later)). As soon as everybody has made payments, I'll order the caps. /S

sheet updated with shipping info for all but a few.

look in the sheet and sign up for what ever you want

You can still get some GRLV from the group buy if you want ...

You received a "Circlotron Driver" board ... look carefully, very similar to the Carbon amp board (The silk description is a bit misleading though). Everybody having ordered Circlotron Output boards v2 will receive the actual Circlotron Output board v2 in two weeks. Everyone can keep the extra set of driver boards. Sorry for the inconvenience it might have caused.

You are certainly no "deadbeat" no worries ;o) The sheet will contain the actual shipping. I always add that after shipping, mostly because the Danish Postal Service is a bit unreliable in terms of shipping costs - we don't have flat rates as US. The US/CA participants is going to be filled in by @mwl168 - he might be occupied by work - haven't heard from him since saturday.

Thanks for notifying: [email protected]

Boards for non-US/CA arrived today. I'll start packing today, and will ship tomorrow. As stated 31st of august: " I assume regular mail (no tracking, no sign-off). Please let me know ASAP if you want other option at [email protected] (remember your head_case ID) "

Update: Boards for US/CA arrived is @mwl168 . Boards for non-US/CA is on its way to Denmark.

For extra GRLV you can still get on the train, shoot me an email: [email protected] ....for parts look at the start of this thread, mwl168 has shared a few Mouser BOMs

deleted /all-ready answered

is that really all you have to say about this build? in all fairness John's build seems like "the best" build Carbon shown on the forum - there has been others fine builds, but not as exquisite as this.

exquisite ... must be the "state of the art" build!

did you check continuity in rgrds to the lt1021 socket like @GeorgeP suggested? or clean up and resolder the joints before replacing sand?

@wink I guess @Dusty Chalk points to that no-one actually pressed the "Like this" , and you might miss a comma after "it"

Wank away, just don't do it behind the bike shed, as people mentally retired have zero tolerance and will take care of you

ohm test the amp boards HV+ - GND, and HV- - GND , around 250kohm-ish as far as I remember ...probably a short somewhere

check you CCS'es if they are putting out what ever you aims for 18-20mA, if you still have the problem you probably need to adjust the tail resistor a bit

being lazy?