The MONGREL (supersym II)

I think Sprint Layout has the ability to export as pdf's, so you don't need adobe---if you want to do that.

Steve.

Nope.. (below)

OS
 

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OS,

have a look if PDF-output is supported when printing the layout (like it is done in the EAGLE software).

Best regards - Rudi_Ratlos

Nope , neither "print setup" or the main "print" dialogs have any reference to PDF's. I do have both the abobe 5 and 7 full , but with the viewer , one can do business with most board houses. Most will even take the sprint files "direct". I have no issues with the JPG's , even etched 1 pixel "targets" with my toner tranfer method (killer resolution). 🙂

OS
 
Is this the real Goldmund killer?
Hopefully there will soon be a group sales made, to order these boards.

Regards,
Rudy

Actually , all 3 (AX , BX and the soon to be released CLX - leach) will most likely exceed both the electrical and sonic aspects of that crappy goldmund I saw in the other thread ( major grounding and power supply "shortcuts") , I absolutely avoided any of these shortcomings with these designs since the commercial "bottom line" does NOT apply here (DIY).

OS
 
I am not an Electro engineer but OS, what type Amplifier is the best, AX; BX or CLX - leach?
I need a lot of power because in the summer we sit outside and sometimes we have a barbeque than I turn the music louder in the living room, maybe I need some extra power transistors on de board 😉

Now I have the ZapPulse 2.3SE I remove that amplifier so I can use my 2 big transformers, 2x 42V 2000Va.
1 monoblock 2 x 47.000µF 80 Volt type Mundorf M-Lytic HC.

I hope somebody arrange a group buy for the boards

Rudy
 
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OS,

as you have noticed: there is some demand for your MONGREL AMP.

The one I am talking about (Patrick and BMW850 and ...as well) is a dedicated 250N/AX version.

But the current measurement (about 300mm) of the 2 PCBs joined together makes it nearly impossible to etch and to install.

Do you have the time (and the mood) to do a re-design of the 250N/AX?
Maybe it will fit on a single PCB with dimension 200 x 100 mm.

This one will be much easier to etch / install and to be offered in a group-buy.

Best regards - Rudi_Ratlos
 
Andrew,

seen from an economic point of view, the use of a single PCB is much more reasonable.

The tooling cost for the little PCB, that can stand on edge, is just as high as the cost for the power-transistor PCB.

Moreover: the cost for the little, additional PCB stands in no relation to its size.

Maybe OS finds a compromise.

Best regards - Rudi_Ratlos
 
Andrew,

seen from an economic point of view, the use of a single PCB is much more reasonable.

The tooling cost for the little PCB, that can stand on edge, is just as high as the cost for the power-transistor PCB.

Moreover: the cost for the little, additional PCB stands in no relation to its size.

Maybe OS finds a compromise.

Best regards - Rudi_Ratlos

All the boards can be placed on a panel that is designed to be snapped apart into its separate boards.

I have been following this thread with great interest and would articipate in a group buy. My needs are more modest than some - 100 watts would do it for me.
 
My needs are more modest than some - 100 watts would do it for me.

Less than 100 watts would do it for me because I want to have some amps that I can bi-amp and tri-amp with. Most likely use 25 to 50 watt amps for tweeters and mids and something bigger for woofers and sub-woofers. A nice small amp for the office than ran off the PC would be sweet too.

One of the main reasons OS made the small driver board was to be able to mix and match the VAS of your choice with the OPS of your choice - it gives great flexibility in what the end user wishes to build without generating several different permutations.

(Permutations? Where in the heck did I learn a BIG word like that? hmmmmmmm............. it seems that some parts of my brain still function. Nah - that can't be right!!!!) 🙄 😀😀😀
 
hey
anyone tried to look at the new TO-220 IRFB ("B" version for classD) ?
or some of the other TO-220 IRF should make for a fast and compact design ?

btw, TO-220 and its relatives appears to be where all the new develloped outputs will be found in the future