Vias are conductive, so you need at least blind vias (expensive)
or burried vias (even more expensive) and a multi-layer board
(expensive again). The single-layer ALU is cheap and works like
charm. HV circuits are easy with that substrate, while the question
about how exactly you want to connect that mains-powered
conductive sandwitch to a grounded radiator plate might get
interesting.
Best regards, Piotr
Reply by Lasse Langwadt Christensen●April 26, 20182018-04-26
torsdag den 26. april 2018 kl. 17.05.15 UTC+2 skrev Piotr Wyderski:
> Lasse Langwadt Christensen wrote:
>
> > I don't know if fr4 bonded to alu is really that much much better a
> > than regular pcb bolted to an alu plate
>
> 1.45mm of missing FR4 better.
>
but you can have vias and multiple layers
Reply by Piotr Wyderski●April 26, 20182018-04-26
Lasse Langwadt Christensen wrote:
> I don't know if fr4 bonded to alu is really that much much better a
> than regular pcb bolted to an alu plate
:-OOO
Why didn't he just use a meter of a bare electric wire
or, if really wanted to be fancy, the flat winding wire like this?
https://4.allegroimg.com/original/01eba1/1a044c464662aabcd908294a25a4
The biggest one can handle 180 amps and can be soldered to a regular PCB
where needed. BTDT, but with the 30A-rated variant.
Best regards, Piotr
Reply by Piotr Wyderski●April 26, 20182018-04-26
Chris Jones wrote:
> I'd also be interested to know whether / how to make connections to the
> aluminium layer - can it be plated onto?
Rivets.
Best regards, Piotr
Reply by Piotr Wyderski●April 26, 20182018-04-26
Phil Hobbs wrote:
> The obvious approach is an aluminum-core circuit board, but I've never used one.
I have used them several times, with excellent results, good direction.
The ones abovementioned were negligible compared to a regular FR4. +50%
or so in
the quantity of 15, prototype-mode order and 10 days manufacturing.
11 bucks net a piece for the size of 88x110mm.
> 3. Any other constraints?
1. There's no point in drilling. ;-)
2. Your vocabulary will get marvelously enriched during the hand
assembly of the prototype, don't even attempt it without a decent preheater.
3. You'll love them.
Best regards, Piotr
Reply by ●April 25, 20182018-04-25
On Wednesday, 25 April 2018 06:02:45 UTC+1, DecadentLinux...@decadence.org wrote:
> tabbypurr wrote in
> news:45ff243a-d5c9-4cf7-a7b4-c27a89e9f790@googlegroups.com:
> > On Wednesday, 25 April 2018 01:01:34 UTC+1,
> > DecadentLinux...@decadence.org wrote:
> >> tabbypurr wrote in
> >> news:b354cef4-6b66-4739-8613-cc70c748a962@googlegroups.com:
> >> > On Tuesday, 24 April 2018 07:18:46 UTC+1,
> >> > DecadentLinux...@decadence.org wrote:
> >> >> Screw the gap pad.
> >> >
> >> > not generally regarded as good engineering practice
> >> >
> >>
> >> Nice job of making an out of context trim, jackass.
> >>
> >> IF you knew how to read, you would have noticed that it gets
> >> replaced
> >> with a BETTER conducting thermal epoxy.
> >>
> >> Wake the fuck up and read. Casual glances at written works makes
> >> you a
> >> piss poor participant.
> >>
> >> Making out of context posts based on your petty, casual glances at
> >> what
> >> was actually written is even worse.
> > Now there's a giant woosh
> Woosh this, motherfucker... thermal epoxy conducts heat BETTER than
> your precious gap filler.
I see you've still completely failed to get that simple joke. No biggie.
NT
Reply by ●April 25, 20182018-04-25
tabbypurr@gmail.com wrote in
news:45ff243a-d5c9-4cf7-a7b4-c27a89e9f790@googlegroups.com:
> On Wednesday, 25 April 2018 01:01:34 UTC+1,
> DecadentLinux...@decadence.org wrote:
>> tabbypurr wrote in
>> news:b354cef4-6b66-4739-8613-cc70c748a962@googlegroups.com:
>> > On Tuesday, 24 April 2018 07:18:46 UTC+1,
>> > DecadentLinux...@decadence.org wrote:
>> >
>> >> Screw the gap pad.
>> >
>> > not generally regarded as good engineering practice
>> >
>>
>> Nice job of making an out of context trim, jackass.
>>
>> IF you knew how to read, you would have noticed that it gets
>> replaced
>> with a BETTER conducting thermal epoxy.
>>
>> Wake the fuck up and read. Casual glances at written works makes
>> you a
>> piss poor participant.
>>
>> Making out of context posts based on your petty, casual glances at
>> what
>> was actually written is even worse.
>
> Now there's a giant woosh
>
Woosh this, motherfucker... thermal epoxy conducts heat BETTER than
your precious gap filler.
Reply by ●April 24, 20182018-04-24
On Wednesday, 25 April 2018 01:01:34 UTC+1, DecadentLinux...@decadence.org wrote:
> tabbypurr wrote in
> news:b354cef4-6b66-4739-8613-cc70c748a962@googlegroups.com:
> > On Tuesday, 24 April 2018 07:18:46 UTC+1,
> > DecadentLinux...@decadence.org wrote:
> >
> >> Screw the gap pad.
> >
> > not generally regarded as good engineering practice
> >
>
> Nice job of making an out of context trim, jackass.
>
> IF you knew how to read, you would have noticed that it gets replaced
> with a BETTER conducting thermal epoxy.
>
> Wake the fuck up and read. Casual glances at written works makes you a
> piss poor participant.
>
> Making out of context posts based on your petty, casual glances at what
> was actually written is even worse.
Now there's a giant woosh
Reply by ●April 24, 20182018-04-24
tabbypurr@gmail.com wrote in
news:b354cef4-6b66-4739-8613-cc70c748a962@googlegroups.com:
> On Tuesday, 24 April 2018 07:18:46 UTC+1,
> DecadentLinux...@decadence.org wrote:
>
>> Screw the gap pad.
>
> not generally regarded as good engineering practice
>
Nice job of making an out of context trim, jackass.
IF you knew how to read, you would have noticed that it gets replaced
with a BETTER conducting thermal epoxy.
Wake the fuck up and read. Casual glances at written works makes you a
piss poor participant.
Making out of context posts based on your petty, casual glances at what
was actually written is even worse.