BPA300 Round 2

[shmulik]

thank you for the measures. I need one more though: what is the size of the drv boards (total size and between holes).

I also intend to place all parts in a single box. This makes a very crowded arrangement. As regulators I intend to use TeddyRegs from the pink fish media DIY forum. I also intend to regulate the power amp's rails by using PowerReg of the same source. I may have to replace the pass transistors to something that can hold higher current as the suggested D44h11, when taking into account the losses for heat in addition to the load current, is marginal.

Shmulik

[shmulik]

Juluska,

in the original BOM at Alex's site the pitch is 9.5 mm. can youverify your measure? both sizes are available in Farnell's inventory.

thanks,
shmulik

[juluska]

[QUOTE]Originally posted by shmulik
[B]thank you for the measures. I need one more though: what is the size of the drv boards (total size and between holes).

Here you har the drv scan in high def:
http://ignatiusprojects.blogspot.com/

[juluska]

Originally posted by shmulik
Juluska,

in the original BOM at Alex's site the pitch is 9.5 mm. can youverify your measure? both sizes are available in Farnell's inventory.

thanks,
shmulik

yes, the pitch is 9,5mm.

[shmulik]

That is what I call good service! Thanks.
now if you could roll that PCB 90 degrees and show the other dimension that would be perfect, unless it is a square (seems a bit higher than wide on the photo).
I wish the PCBs could be sent over email or downloaded from the forum just like pictures...

[juluska]

Originally posted by shmulik
That is what I call good service! Thanks.
now if you could roll that PCB 90 degrees and show the other dimension that would be perfect, unless it is a square (seems a bit higher than wide on the photo).
I wish the PCBs could be sent over email or downloaded from the forum just like pictures...

42x43,50mm
Here you har the drv new scan in high def:
http://ignatiusprojects.blogspot.com/

[shmulik]

Juluska,

Thank you again. However, I could not escape noticing two facts:
1) you were using the same ruler for the two measurements (and combining photos)
2) this ruler is only true at 20 degrees Celsius.

were you meticulously keeping the temperature stable between photos?!

Sorry about that. it is stronger than me and I could not resist the temptation. must be the Mediterranean summer

Shmulik

[juluska]

Originally posted by shmulik
Juluska,

Thank you again. However, I could not escape noticing two facts:
1) you were using the same ruler for the two measurements (and combining photos)
2) this ruler is only true at 20 degrees Celsius.

were you meticulously keeping the temperature stable between photos?!

Sorry about that. it is stronger than me and I could not resist the temptation. must be the Mediterranean summer

Shmulik

Stell dilatation coeficient is 12x10-6, I'm in Tarragona at 23ºC, so the measurement error is about 0,042mx12x10-6x3ºc= 1,26x10-6m.

[HaLo6]

juluska or anyone,

Question, I bought the kit from rhysh as well, but the SMD caps aren't labeled like resistors are, how do you tell them apart?

[juluska]

Originally posted by HaLo6
juluska or anyone,

Question, I bought the kit from rhysh as well, but the SMD caps aren't labeled like resistors are, how do you tell them apart?

I have the same problem, there no mark or numeration.