Pavel Dudek's super Gainclone group buy

[Mark Johnson]

Hi peranders, your Private Messages box seems to have overflowed, image attached.

_

 

[Vunce]

Happy New Year P-A!
About how long until these "Black Beauties" arrive in the US?
Is there a way to track them?
Thank you.

 

[peranders]

They are sent as plain letters so no possibility to track. We have lot's of red days so I'll expect that they will turn up rather soon.

 

[Vunce]

I had to figure out what 'red days' meant��
Can't wait to start this build, thanks again!

 

[peranders]

Could perhaps be other days but normally in Sweden at least, it is Sundays and other free days.

 

[Vunce]

Got my boards yesterday, they look sweet! Now the fun begins......
Thanks agains P-A

 

[redjr]

Hi all - My boards arrived in the USA (Danbury, CT) on Saturday.

 

[tof1986]

Hi All. Nothing for me in France...

Envoyé de mon LG-D855 en utilisant Tapatalk

 

[HerrErnie]

Hi all - My boards arrived in the USA (Danbury, CT) on Saturday.

You'd think that a letter from Sweden to Germany should be faster than from Sweden to the USA. "It ain't necessarily so."
Cheers,

Micha

 

[gabe75]

hi all ! nothing for me in usa(chicago).
i am curious about the heat sinks, where do you guys plan to buy them from?
thanks,

gabe

 

[Andreas B]

Hi Per-Anders

I got today,my pcb.Thank you
Regars
Andreas

 

[reaper996]

Pers-Anders:

I got my boards today.
I have a question regarding the transformers, the spec sheet for the LM4780 calls for 20 to 84V range, what seems to work best for this design?

Thanks,

Patrick

 

[seventenths]

P-A,
I received my boards today and they look great!

Thank you,
d

 

[bk856er]

Arrived in California today and looking really good!

I'm also curious about board heatsink options.

BK

 

[AndrewT]

Pers-Anders:

I got my boards today.
I have a question regarding the transformers, the spec sheet for the LM4780 calls for 20 to 84V range, what seems to work best for this design?

Thanks,

Patrick

20Vdc and 84Vdc are limits.

For an 8ohms speaker you can use 40Vdc to 78Vdc
For 4ohms speaker you can use 40Vdc to 62Vdc
Both will work below 40Vdc, but I would not recommend the 4780 for such low voltages.

In both cases you must cool the dual channel chip adequately. It is trying to dissipation the waste heat from those two channels through a tiny interface contact area.

 

[peranders]

I'll suppose that all pcb's are at their right destinations by now.

 

[loafimus]

For the heatsink questions in US, I used one from HeatsinkUSA.

The thread http://www.diyaudio.com/forums/chip-amps/280949-newbee-build-pa03-amp-lm4780.html has a lot of good information on a couple of builds.

 

[HerrErnie]

I'll suppose that all pcb's are at their right destinations by now.

If destination means addressee, no. I've received nothing until now.

Micha

 

[gabe75]

Not here yet, but it's 8:09 am in Chicago , I hope I'll meet those beauties today when the ups will show up.any ideas for the heatsink ?

 

[AndrewT]

I do wish Heatsink USA would sent a batch of a couple of tons of their sinks to a distribution warehouse in the UK.

Then we might get some sensible UK pricing for bigger heatsinks.