L'Amp: A simple SIT Amp - Page 57

Zen Mod · 2nd February 2012, 08:13 PM

why waiting

L'amp Part2 and Part 3 together ......... ?

ra7 · 3rd February 2012, 02:18 AM

Part deux is up... A fun read!

Thanks Mike!

Zen Mod · 3rd February 2012, 05:10 AM

juanitox · 3rd February 2012, 05:50 AM

great news, this one could fit the bill? Hammond 193V Choke 150mh 3a 1ohm DC not so expensive

nicoch58 · 3rd February 2012, 10:10 AM

Michael Rothacher · 3rd February 2012, 11:09 AM

I know a couple of readers had their hearts set on something active, so here you go:

L'Amp CCS Addendum

nicoch58 · 11:20 AM

nice! what difference on sound vs choke ?

PS
on tube ,for some choke is preferred to ccs ,less dry/analytic

Michael Rothacher · 3rd February 2012, 11:25 AM

The CCS versions I have listened to sound very good, but in my opinion don't sound as "big" or as "snappy" as their passive counterparts.

In that sense, they sound a bit more "conventional" while maintaining a touch of the SIT magic. The midrange is particularly nice.

For the moment, I still prefer the big dumb versions.

flg · 3rd February 2012, 11:45 AM

Thank you Michael. But, I can't get the CCS link from work

Hey, Some time back I played with the ZenV9 circuit using a big Hammond choke load instead of Aleph. Actually, I think it worked quite well. But, 1 thing that it did do that is somewhat of a problem is it made physical, vibrational noise with signal. It was a frequency/amplitude sesitive thing (maybe started around 3k?) but, quite audible. I believe they were spec'd well enough for this amp (3-5A, .64 ohm, 100+mH IIR)
You might never notice this phenomina unless you test with a resistor load. Have you noticed this problem? Can you hear your amp without any speakers?
I don't know if it's the E-Core Lams or the windings or? I wonder if impregnating epoxy resin into the windings will stop this or?
Great work! But, ya know, I was kinda hoppin you where gonna duex a mu follower or somthin?

Michael Rothacher · 3rd February 2012, 01:34 PM

This is not an issue with a big, heavy ga. air-core.

Iron is another matter, though.

Be sure to grab that pdf when you get home.

2nd February 2012, 08:13 PM	#561
Zen Mod diyAudio Member Join Date: Jan 2003 Location: ancient Batsch , behind Iron Curtain	why waiting L'amp Part2 and Part 3 together ......... ? __________________ my Papa is smarter than your Nelson ! tnx to clean thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; Mighty ZM's Bloggg;I'm dumb

3rd February 2012, 05:10 AM	#563
Zen Mod diyAudio Member Join Date: Jan 2003 Location: ancient Batsch , behind Iron Curtain	__________________ my Papa is smarter than your Nelson ! tnx to clean thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; Mighty ZM's Bloggg;I'm dumb

3rd February 2012, 05:50 AM	#564
juanitox diyAudio Member Join Date: Dec 2006	great news, this one could fit the bill? Hammond 193V Choke 150mh 3a 1ohm DC not so expensive __________________ French is not a crime.

3rd February 2012, 10:10 AM	#565
nicoch58 diyAudio Member Join Date: Oct 2004	__________________ Sic58

3rd February 2012, 11:09 AM	#566
Michael Rothacher www.audiohobby.com diyAudio Member Join Date: May 2001 Blog Entries: 3	I know a couple of readers had their hearts set on something active, so here you go: L'Amp CCS Addendum __________________ My Website, Projects, Sale Items


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

3rd February 2012, 02:18 AM	#562
ra7 diyAudio Member Join Date: Feb 2009 Blog Entries: 1	Part deux is up... A fun read! Thanks Mike!

3rd February 2012, 11:17 AM	#567
nicoch58 diyAudio Member Join Date: Oct 2004	nice! what difference on sound vs choke ? PS on tube ,for some choke is preferred to ccs ,less dry/analytic __________________ Sic58 Last edited by nicoch58; 3rd February 2012 at 11:20 AM.

3rd February 2012, 11:25 AM	#568
Michael Rothacher www.audiohobby.com diyAudio Member Join Date: May 2001 Blog Entries: 3	The CCS versions I have listened to sound very good, but in my opinion don't sound as "big" or as "snappy" as their passive counterparts. In that sense, they sound a bit more "conventional" while maintaining a touch of the SIT magic. The midrange is particularly nice. For the moment, I still prefer the big dumb versions. __________________ My Website, Projects, Sale Items

3rd February 2012, 11:45 AM	#569
flg diyAudio Member Join Date: Jul 2005 Location: North East	Thank you Michael. But, I can't get the CCS link from work Hey, Some time back I played with the ZenV9 circuit using a big Hammond choke load instead of Aleph. Actually, I think it worked quite well. But, 1 thing that it did do that is somewhat of a problem is it made physical, vibrational noise with signal. It was a frequency/amplitude sesitive thing (maybe started around 3k?) but, quite audible. I believe they were spec'd well enough for this amp (3-5A, .64 ohm, 100+mH IIR) You might never notice this phenomina unless you test with a resistor load. Have you noticed this problem? Can you hear your amp without any speakers? I don't know if it's the E-Core Lams or the windings or? I wonder if impregnating epoxy resin into the windings will stop this or? Great work! But, ya know, I was kinda hoppin you where gonna duex a mu follower or somthin? __________________ “Be who you are and say what you feel because those who mind don't matter and those who matter don't mind.” Dr. Seuss

3rd February 2012, 01:34 PM	#570
Michael Rothacher www.audiohobby.com diyAudio Member Join Date: May 2001 Blog Entries: 3	This is not an issue with a big, heavy ga. air-core. Iron is another matter, though. Be sure to grab that pdf when you get home. __________________ My Website, Projects, Sale Items

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
L’Amp: A Simple SIT Amp: Part 1	Michael Rothacher	diyAudio.com Articles	20	2nd March 2013 08:26 PM
SIT Amp Article Out Now	Variac	Site Announcements	0	2nd December 2011 07:55 AM
Srajan has the 1st SIT amp for Une dégustation	vizion	Pass Labs	131	14th November 2011 11:41 PM
SIT-Preamp	VladimirK	Solid State	36	27th August 2011 08:36 PM
New SIT - old problem	StevenOH	Parts	2	13th June 2008 10:46 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read