rowemeister said:
Sometimes you simply HAVE to use a smaller value, because otherwise they won't fit on the board...
But they are great caps. Standard parts for me now, together with Pana FC and Ruby ZA/ZL(H) in less critical places.
Ray
Malefoda said:
No 😀, the RJH are fine caps too, but at Farnell they are phasing them out. I don't know if Elna stopped production, or Farnell just doesn't stock them anymore. Maybe it has something to do with RoHS.
Ray
HI.
For another review of the LM4562s, read this :-
Post 25
http://www.diyaudio.com/forums/showthread.php?s=&threadid=67453&perpage=10&pagenumber=3
Johnm reviews for HiFi World.
Andy
For another review of the LM4562s, read this :-
Post 25
http://www.diyaudio.com/forums/showthread.php?s=&threadid=67453&perpage=10&pagenumber=3
Johnm reviews for HiFi World.
Andy
Excellent - these are really nice op amps.
Suprised by the 627 getting hot though - must be at their voltage limit (maybe)
Brent
Suprised by the 627 getting hot though - must be at their voltage limit (maybe)
Brent
Hi there,
what do you think of such things:
http://www.audaud.com/article.php?ArticleID=432
http://www.combak.net/otherproducts/OTHERPRODUCTS.htm
or Monster Cable Discus+ ???
Seems they can sell magic powder than change a 10€ CDP into a 10.000 one...
what do you think of such things:
http://www.audaud.com/article.php?ArticleID=432
http://www.combak.net/otherproducts/OTHERPRODUCTS.htm
or Monster Cable Discus+ ???
Seems they can sell magic powder than change a 10€ CDP into a 10.000 one...
The 'getting hot' bit in the link is prima facie evidence of teh opamp oscilating. Using fast opamps in sockets - or BD adaptors - you probably need some decoupling right acrosss the V= to V- pins to stop this; 10nF is probably enough.
Malefoda said:
I cannot get the first link to work.
As for disk covers, these are not new. They work to an extent. Also suggested was to try an extra cd on top of the one playing for the same effect. There is some basis to the idea. [ Some cd-players use a turntable to play the cd upsidedown so that it is fully supported / damped ]
It's a bit like the green light idea [ and green pens, ink etc ]. There is some basis for these ideas and , hey, green leds look KOOL
Andy
PS you can even buy a cd to 'demagnetise' your complete system. Quite what it does for 'speakers, I'm not sure !!
Hello to everyone!
I'd like to try some 470u/16V Nichicon FG (Fine Gold) for C805/806 and C651/654 (HDAM). How they are? Thank you!
I'd like to try some 470u/16V Nichicon FG (Fine Gold) for C805/806 and C651/654 (HDAM). How they are? Thank you!
LPF SPICE plots
Just downloaded SwitchercadIII (aka LTspice) from Linear Technology's website.
Modelled the 67's LPF so thought I'd put the plot in so people can see the response curve of different filter combinations.
Green: stock filter
Red: 100pf changed to 150pf as Thorsten suggests
Blue: 1000pf changed to 470pF (Bessel)
Unless I've made a balls-up (not unlikely as I was a Spice virgin) the Bessel is still only 0.5dB down at 14kHz.
Does this look right?
Just downloaded SwitchercadIII (aka LTspice) from Linear Technology's website.
Modelled the 67's LPF so thought I'd put the plot in so people can see the response curve of different filter combinations.
Green: stock filter
Red: 100pf changed to 150pf as Thorsten suggests
Blue: 1000pf changed to 470pF (Bessel)
Unless I've made a balls-up (not unlikely as I was a Spice virgin) the Bessel is still only 0.5dB down at 14kHz.
Does this look right?
Attachments
Ray, in the 63 with the notch filter, if lowering the cap from 1n to, say 470p, the inductor has to be raised from 220u to round 470u to keep the notch tuned to 8*fs?
Correct?
Correct?
Cheers Ray.
I get an overall voltage gain of -0.4dB within the passband which I assume is also correct.
I get an overall voltage gain of -0.4dB within the passband which I assume is also correct.
avr300 said:
I'll let Ray answer your question, but I think I read somewhere (maybe Pedja Rigic's site) that there is no energy at this frequency anyway... so maybe that's why they didn't bother on the 67 and 6000.
I'll stick it in my Spice model anyway and have a play (waiting for a pizza to arrive🙂 )
avr300 said:
Hi avr,
I use 430pF and 470uH to be exact, and adjusted the resistors to compensate for the lower value and keep group delay constant.
I posted a PDF here that shows 'before' and 'after' graphs.
Glenn2 said:
The level at 1kHz should be your reference level, at 1kHz set it to 0dB. Then look at 20kHz and you'll see about -1dB roll-off.
Regards,
Ray
avr300 said:
It still hasn't arrived....
Anyway, the original 1000pF+220uH is tuned to 340kHz.
Lowering to 470pF detunes it to 491kHz.
Changing to 470pF+470uH tunes it to 348kHz which is actually a little close to 8*Fs than it was before (352.8kHz).
So, 470uH is the value you want.