Pass "DeLite" Amp from BAF - Page 70

jambul · 19th July 2011, 09:26 AM

Hi all & off course mr. Nelson Pass

another newbie question, how if i want to make the pass delite using the irfp240 only without using the ixys and semisouth fet.

any schematic?

thank you

regards

denis

flg · 19th July 2011, 11:48 AM

Page 10 of the DeLite article covers that

Peter M. · 19th July 2011, 06:42 PM

Or here

http://www.passdiy.com/pdf/zenlite.pdf

Nelson Pass · 19th July 2011, 11:18 PM

I think you don't want to lose sight of

2SK82 + Lightbulbs = Fun

posted by the notorious smarty-pants Mike Rothacher.

jambul · 20th July 2011, 03:10 AM

thank you guys,
well, i think i need to read everything from the beginning again. it's my new diy try after the dc coupled b1 . sure that i had to read all over again to understand how they work. it's a bit hard for an accountant :-)

nuconz · 23rd July 2011, 10:41 PM

hello:

did anyone ever offer a DeLite kit or pc board for the "final" version of this amp?

Nelson Pass · 24th July 2011, 02:12 AM

Probably not. It's too simple to justify that much effort.

stefanobilliani · 3rd August 2011, 03:07 PM

Hello All , I have a little question .
I am just trying a version with the depletion Jfet and the light bulb .
Also a little feedback loop resistor from Drain to gate .
These are the values :
R, light bulb 15 ohm
I, 2 amps
Vgs, -5,3 volt
Vds 30 Volt
Vdd 60 volt .

Is that ok? or the current is too strong for the D-Jfet ?

Thanks

Nelson Pass · 3rd August 2011, 04:02 PM

Keep it cooled and you should be OK.

DIYer Straits · 6th August 2011, 04:29 PM

Hi Mr. Pass and you guys over here
This is my first post in this thread and I have been following diligently with the Delite amp and its various permutations. ;D I have decided to plunge in after listening to Tony Wong's creations and loved the sound that the Delite can give. However, the light bulb I can live without as I prefer to listen in the dark. A 1000W bulb is a leeetle bit too bright for my liking. Glowing tubes like the SV811/572/211/845 I can live with and I have. The Delite CCS is a Godsend!
Now, after following Sgr Steffanobillani's CCS circuit on page 61 post #605 to the letter, I have this little problem, I am unable to get half the rail voltage (40V DC) at Q1's drain. Q1 source is 1.8V, Q2 source is 34.7V, Q1 drain is 31.5V. Adjusting R7 doesn't seem to do anything except vary the voltage between R7 and R10 from 34V to 23V. How do I bias Q2? My creation is posted in this forum [url=http://www.xtremeplace.com/yabbse/index.php?topic=72166.msg694442#msg694442]here.[url/]

19th July 2011, 11:48 AM	#692
flg diyAudio Member Join Date: Jul 2005 Location: North East	Page 10 of the DeLite article covers that __________________ “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

19th July 2011, 06:42 PM	#693
Peter M. diyAudio Member Join Date: Jan 2005 Location: Østfold	Or here http://www.passdiy.com/pdf/zenlite.pdf __________________ Note to myself: Never again use fingers to check if there still is voltage left in a capacitor...

23rd July 2011, 10:41 PM	#696
nuconz diyAudio Member Join Date: Jan 2006 Location: central north florida	DeLite pc board or kit hello: did anyone ever offer a DeLite kit or pc board for the "final" version of this amp?

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19th July 2011, 09:26 AM	#691
jambul diyAudio Member Join Date: Mar 2011	Hi all & off course mr. Nelson Pass another newbie question, how if i want to make the pass delite using the irfp240 only without using the ixys and semisouth fet. any schematic? thank you regards denis

19th July 2011, 11:18 PM	#694
Nelson Pass The one and only Join Date: Mar 2001	I think you don't want to lose sight of 2SK82 + Lightbulbs = Fun posted by the notorious smarty-pants Mike Rothacher.

20th July 2011, 03:10 AM	#695
jambul diyAudio Member Join Date: Mar 2011	thank you guys, well, i think i need to read everything from the beginning again. it's my new diy try after the dc coupled b1 . sure that i had to read all over again to understand how they work. it's a bit hard for an accountant :-)

24th July 2011, 02:12 AM	#697
Nelson Pass The one and only Join Date: Mar 2001	Probably not. It's too simple to justify that much effort.

3rd August 2011, 03:07 PM	#698
stefanobilliani diyAudio Member Join Date: Jun 2002 Location: Italy	Hello All , I have a little question . I am just trying a version with the depletion Jfet and the light bulb . Also a little feedback loop resistor from Drain to gate . These are the values : R, light bulb 15 ohm I, 2 amps Vgs, -5,3 volt Vds 30 Volt Vdd 60 volt . Is that ok? or the current is too strong for the D-Jfet ? Thanks

3rd August 2011, 04:02 PM	#699
Nelson Pass The one and only Join Date: Mar 2001	Keep it cooled and you should be OK.

6th August 2011, 04:29 PM	#700
DIYer Straits diyAudio Member Join Date: Jul 2003 Location: Singapore	Hi Mr. Pass and you guys over here This is my first post in this thread and I have been following diligently with the Delite amp and its various permutations. ;D I have decided to plunge in after listening to Tony Wong's creations and loved the sound that the Delite can give. However, the light bulb I can live without as I prefer to listen in the dark. A 1000W bulb is a leeetle bit too bright for my liking. Glowing tubes like the SV811/572/211/845 I can live with and I have. The Delite CCS is a Godsend! Now, after following Sgr Steffanobillani's CCS circuit on page 61 post #605 to the letter, I have this little problem, I am unable to get half the rail voltage (40V DC) at Q1's drain. Q1 source is 1.8V, Q2 source is 34.7V, Q1 drain is 31.5V. Adjusting R7 doesn't seem to do anything except vary the voltage between R7 and R10 from 34V to 23V. How do I bias Q2? My creation is posted in this forum [url=http://www.xtremeplace.com/yabbse/index.php?topic=72166.msg694442#msg694442]here.[url/]

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