Part of discussion that taken place here today was moved to this thread: http://www.diyaudio.com/forums/showthread.php?s=&postid=207243#post207243
mrfeedback said:
Eric,
The transistor tab is generally connected to the collector isn't it, which is normally (in the majority of cases which are CC output stages) to the power supply. So your extra isolator cap is in parallel with the supply caps, which I guess wouldn't change the sound.
Different sound from different heatsinks is common, because the heatsing itself will be exited by the vibrating transistors (caused by the AC currents through the transistors). So, depending of material ands geometry of the heatsink, your amp has subtle character properties.
Jan Didden
jh6you said:
If in serial, change the sound, you guess?
Not sure I get your point?
The discussion was that the extra cap between chassis and transistor (because of the isolating tab) would influence the amp stability or loop response, kinda like a compensation cap. My point was that generally (there may be exceptions) the cap effectively is in parallel with the supply cap (transistor collector = supply to chassis = gnd) so the discussed effect wouldn't appear.
Then again, you may just be joking?
Jan Didden
I read thru this thread for the 1st time last nite.
I would like to officially thank all those that stepped in and made this thread interesting and useful (Andy, Jan, peter (analog_sa), AF, jonathan, Fred to name a few),
... and i would like to chastise Millwood for all his bullying posts, and his lack of constructive addition to this thread -- one constructive post could have lead this thread into the excellent discussion those above finally treated us to. This thread is not the only place where you have been posting stuff that reads like a certain Monty Python sketch. If it continues, we may just have to put you back under moderation -- we would rather not do that (we would rather have you act as a contributing adult) as besides being inconvenient and embarrassing for you, it is also painful and annoying for all the Moderators. You don't want grumpy Moderators, I assure you.
Peter Daniel has already been chastised by his fellow Moderators for letting millwood lead him around and responding in kind. He has given us assurances that he'll not engage in this kind of personal back-and-forth again, even when provoked, as he clearly was here.
We will also get those posts cleaned out so that the next people starting to read this thread from scratch don't have to wade thru 3 or 4 pages before they get to the good part.
dave
I would like to officially thank all those that stepped in and made this thread interesting and useful (Andy, Jan, peter (analog_sa), AF, jonathan, Fred to name a few),
... and i would like to chastise Millwood for all his bullying posts, and his lack of constructive addition to this thread -- one constructive post could have lead this thread into the excellent discussion those above finally treated us to. This thread is not the only place where you have been posting stuff that reads like a certain Monty Python sketch. If it continues, we may just have to put you back under moderation -- we would rather not do that (we would rather have you act as a contributing adult) as besides being inconvenient and embarrassing for you, it is also painful and annoying for all the Moderators. You don't want grumpy Moderators, I assure you.
Peter Daniel has already been chastised by his fellow Moderators for letting millwood lead him around and responding in kind. He has given us assurances that he'll not engage in this kind of personal back-and-forth again, even when provoked, as he clearly was here.
We will also get those posts cleaned out so that the next people starting to read this thread from scratch don't have to wade thru 3 or 4 pages before they get to the good part.
dave
No the effect is one way (aging) but the wine does revert to original after 30 minutes or so when removed from the said coaster.SY said:
This effect can be demonstrated in the bottle or in the glass.
SY, I know that you are heavily involved with winemaking industry and this may seem very odd, but it is true and has been verified by many fellow imbibers.
Eric.
Eric: We had some of those sorts of devices marketed here in the States. When actually tested by the standards customary in the industry (ie, blind and controlled), they failed to work. I can put you in touch with some folks in Oz who will be happy to look at that sort of thing, if you thing you've got something different.
I now return the thread to its intended topic.
I now return the thread to its intended topic.
jh6you said:Referring to the pictures above, what are the tapes for?
To put added mass on the top of caps and by doing so to increase natural frequency? Or what?
Assuming that the spring rate remains unchanged, adding mass to an oscillating system reduces the resonant frequency AND the damping. But with a driven (forced) system, adding mass reduces the amplitude of displacement at the driven frequency; and that happens to be the desired effect.
jh6you said:Bending moment?
What about shear forces?
Shear stresses in a "long beam" are typically small compared to axial stresses induced by bending.
Regards,
Mark
planet10, you are entitled to your opinion, however biased I think it is.
As to your wishes, I am whom I am and I don't intend to change myself to make you or anybody happy.
If you want to kick me out for having a different view and trying as hard as I did to have a civil conversation with one of your fellow moderators, in spite of repeated attacks, be it.
As to your wishes, I am whom I am and I don't intend to change myself to make you or anybody happy.
If you want to kick me out for having a different view and trying as hard as I did to have a civil conversation with one of your fellow moderators, in spite of repeated attacks, be it.
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