MPP

[Benedetto]

Be assured: No problems with quality. And of course no problems with soldering, as boards are tinned (as is every professional made pcb unlesse you don't want it).

I second that .

 

[Joachim Gerhard]

Ok, why not try it. Although this design needs a lot of ( mostly inexpensive ) parts we where trying from the beginning to make it economical. Lets use that supplier from China.
Red boards with tinned copper.

 

[Joachim Gerhard]

There is another effect in bipolar transistors i did not mention : the Kirk effect.
Here is some information:
Bipolar Junction Transistors

 

[Joachim Gerhard]

Ricardo, for this kind of project i usually use Wima FKP1 2,5%. They are PP film and foil.
Very good and inexpensive. When you parallel them you get even closer tolerance because they even out (Douglas Self). For example you can use 4 x 10nF plus 470pF plus 330pF.
You can also use 6,8nF everywhere : 2 x 6,8nF = 13,6nF and 6 x 6,8nF = 40,8nF.

 

[Audiofanatic]

Merry Christmas my friend

Hi Joachim,

Merry Christmas to you and your family

BTW I also use the FKP1 and the Siemens caps I like them.


atb,


José

Audiofanatic

 

[Joachim Gerhard]

We both like the same. It´s a miracle.

 

[Joachim Gerhard]

Hesener, please make space for the Wima 6,8nF FKP1. I think that is a good solution.

 

[Audiofanatic]

Miracle

Hi Joachim,

Yes we like the same things it seems
We both are awake also and we both like to make things better.

The biggest difference between us is that you are blond and I have black hair

Beautiful and crazy at the same time isn't it?

Thanks for all your support in this thread, it's just great !

atb,


José

Audiofanatic

 

[hesener]

Hesener, please make space for the Wima 6,8nF FKP1. I think that is a good solution.

ok no problem

 

[hesener]

Regarding the Riaa caps, I see 2 x 20.4nF and 2 x 6.8nF

The 6.8 value (6800pf) is easy to find and my 1st choice would be Relcaps RTE - Polystyrene Film & Tin Foil, but 20.4 .... Can not find it anywhere.

HiRicardo,

my first approach was to put place for two caps so people could select and put whatever they want in parallel.... anyway, the choice right now is to put Wima FKP1 so I will change the footprint to that, should fit most others anyway.
what is the size and grid spacing of your caps, just curious?

 

[hesener]

I think Hesener should do the choice. He may have some experience.

Hi,
we buy a lot of prototype PCBs from various vendors in our (company) lab, mostly local, and the differences are small. Have good experience with a czech company

PRINTED s.r.o. - Homepage

and the quality is good, cost is low, and service is excellent (their sanity check did find a few hiccups.... yes it happens ;-))

Will get quotes from PCBCART and the Printed and report back.... since last night, 90% of the routing done.... will have to attack a few difficult cases and the ground planes now.....

 

[masag1]

Count me for tow Stereo Pcb.

Regards Sam

 

[Bksabath]

On Caps

I like the FKP as well and what about same space/pads for parralel combinations.

I will be interested in the PCB as well

Could you post the last SCH for this circuit.

Last but not least Merry Cristmass everione

 

[MiiB]

Hesener....what CAD-package do you use for PCB layout..??

michael

 

[mad_z]

Hi Guys,

I was totally lost for last 2 days so no chance to wish you ALL Merry Christmas - still there are some hours left today for the good wishes!

I am also voting for pad for fkp - these are easy to get in 2.5% tolerance.

I will take at least one set for stereo of PCB's

 

[Holger Barske]

Buerklin in Germany stocks FKP2 with 1% tolerance.

 

[Benedetto]

Buerklin in Germany stocks FKP2 with 1% tolerance.

And the price is geting lower by the number...
So we should consider a GB.

 

[Joachim Gerhard]

Yes, i would use 2 x 6.8nF and 6 x 6,8nF. There is also a new cap from Roederstein, the KP1830 film and foil that comes in 1% and also has 6.8nF.

 

[Joachim Gerhard]

Hesener, this Printed company makes a good impression. I put it in your hand to choose the supplier to avoid any more long discussion. Because you are doing the layout anyway it has to suite your working style.

 

[Holger Barske]

the KP1830 film and foil that comes in 1% and also has 6.8nF

Only found it at Mouser. 14 weeks lead time, 1250 pcs. minimum order.