[silvervarg]

I happened to notice nother product called M³ (with the superscript and everything) on TV today. It is the new model manual razor (with battery!) from Gillette.
It is way to late to change name for this amp now anyway, and I believe the name was used long before any of us knew about this product, but it might still be a bit funny as you choose not to call it M3 since there was another product with that name...

 

[z2trillion]

Once the dust gets in, is there any easy way to get it out, or is that something I'll just have to live with? I'm sort of compulsive about keeping all my things dust free, but I guess everything has a price.

 

[amb]

silvervarg, it's too late to change the name. Bte, the Gillette razor is called M3 here in the US, not M³. I always thought that was a bit funny, because there is a competing product from Schick called "Quattro" (with reference to cars).

z2trillion, you can blow out the dust with compressed air.

 

[uzziah]

i think we're all getting a bit dust-crazy

point made.

 

[kasra]

What kind of bias increase can one expect if 2" heatsinks are used compared to 1,5"?

 

[uzziah]

btw: this is a bit late in coming, but you guys deserve a big round of applause for all this. very exciting. if your ever in the denver area, glad to offer you a brew

 

[amb]

kasra, the recommended bias is 80mA per channel, but you can pump it up some more if you want, as long as your power supply has the capacity. Of course the 2" heat sink will allow you to do this more than the 1.5" version, but it all depends on how well ventilated the case is. If the heat sink gets uncomfortable to touch for more than a few seconds, then you know it's too hot!

I had experimented with 250mA per channel in an open-air environment (uncased) on 2" heat sinks and 24V supply. It got hot, but was still safe. However that's likely too much within a case even with good venting slots.

uzziah, thanks for the compliments. We're having a lot of fun with this too.

 

[kasra]

amb:
Thank you for the clarification, the reason is im going with a 80mm (external) chassie. I also found that the heatsink model in question is available in 2.5" height, which might be fun to play around with

Ive also read through your homepage, and it is magnificent and great information source for builders!

Which of the options is prefred for the compensation of N-channel´s less capacitance? (C3 vs. adj. R8+-)

 

[amb]

Quote:

Originally Posted by kasra Which of the options is prefred for the compensation of N-channel´s less capacitance? (C3 vs. adj. R8+-)

No preference... it's up to you.

 

[morsel]

Kasra: I prefer using C3 to compensate the N channel MOSFET as this results in symmetrical impedance for both halves of the output stage, but both methods work.

M³ boards are now available at amb's audio shop. Woohoo!

 

[amb]

 

[skyskraper]

*sigh* just as the iron is cooling from my dynalo and i start to look forward to a break, morsel answers my eternal question

off to buy i go!

 

[uzziah]

hows about that pars-metal groupbuy about now?

now that us folks can buy ourselves the goods, we're probably going to want to get to building. wasn't someone going to arrange that?

we should start a seperate thread, get the dimensions we want down quickly, and get er done, eh?

i hope whoever offered to do that could, but if that falls through i can do it.

(i'd much rather have them do it, though

)

 

[MisterX]

Quote:

i hope whoever offered to do that could, but if that falls through i can do it.

Have at it.
I have to many other things going on right now to take on the group buy anyhow.

 

[Nisbeth]

AMB: Could you perhaps update the documentation on your website with the max. physical dimensions of the capacitors (especially for C6 and Cbb)? Thanks!

/U.