Chill-amp page!

[fedde]

Originally posted by Variac
OK, the amp PARTS look good!

Well, thank you...

Originally posted by Variac
I'm in on Brian's current group buy,

So is everybody these days...

Originally posted by Variac

and it helps me imagine how mine will look!. I have been concerned about the attenuator because I just got a switch-now I have to wire it!!! Once the initial buy is over, maybe you can supply the European gaincloners!

I hope so... I had to invest a lot of money for the initial costs of the PCB's and the kit components... (and much time of course...)

Fedde

[Peter Daniel]

Originally posted by fedde

So is everybody these days...

Your board is very good too, and has certain advantages over Brian's board (and Brian's over yours ). Those two boards are quite different and I don't see why both of them shouldn't be appealing and have a similar share of interest.

While Brian's board is double sided and through hole plated, your's OTOH is more simplified and actually very close to original GainCard concept. So if somebody wants to copy 47Labs exactly, this is the board for them. You also have the option for coupling caps and Zobel network on board, something that Brian's board doesn't have. The chip mounts in a different way to heatsink as well, which may be advantegous in some setups.

Brian's board offers the most simplified GC configuration, with just two (or three) resistors, something that I found working well for me. Its size will also acomodate BG caps (which I don't think is possible with yours). The wire connections are also straightforward and clearly labelled and it doesn't require drilling the holes, so I would say it is made mainly with a thought of newbies and quick assembly procedures. Yours requires more careful thinking when assembling, but this may bring bigger rewards after.

Do you have to bend the pins in the other direction, or there is a chip version for that configuration?

[fedde]

I think the difference is in size. My board is very compact, but is due to that reason a bit limited in component choice. Still, I'd guess I can use a lot of 1000 uF and 1500 uF brands. All PCB's are now drilled, only your test PCB's were not drilled yet! The PCB's are accompanied with a manual that should be very straightforward (step by step information): so the Chill-amp project is also for beginners!!!

I do not have to bend the pins, I only have to cut them! I use the chip in line with the PCB, so not 90 degrees turned as you do...

All the best,

Fedde

[fedde]

For all the folks who wonder how a Chill-amp looks inside, have a look at this:

(please ignore the loose wire and the bended diode...)

[fedde]

As you can see on the picture I decided to skin the caps...
(BTW: that will be much easier if you do it before the caps are mounted...)
At this moment, I have connected the case directly to the ground. This sounds better than the 220 ohm//220 nF in series (with the blue wire) I used before.

Fedde