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Old 19th July 2011, 09:26 AM   #691
jambul is offline jambul  Belgium
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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


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Old 19th July 2011, 11:48 AM   #692
flg is offline flg  United States
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Page 10 of the DeLite article covers that
"It was the perfect high end audio product: Exotic, inefficient, expensive, unavailable, and toxic." N.P.
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Old 19th July 2011, 06:42 PM   #693
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Note to myself: Never again use fingers to check if there still is voltage left in a capacitor...
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Old 19th July 2011, 11:18 PM   #694
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I think you don't want to lose sight of

2SK82 + Lightbulbs = Fun

posted by the notorious smarty-pants Mike Rothacher.

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Old 20th July 2011, 03:10 AM   #695
jambul is offline jambul  Belgium
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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 :-)
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Old 23rd July 2011, 10:41 PM   #696
nuconz is offline nuconz  United States
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Default DeLite pc board or kit


did anyone ever offer a DeLite kit or pc board for the "final" version of this amp?
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Old 24th July 2011, 02:12 AM   #697
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Probably not. It's too simple to justify that much effort.

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Old 3rd August 2011, 03:07 PM   #698
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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 ?

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Old 3rd August 2011, 04:02 PM   #699
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Keep it cooled and you should be OK.

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Old 6th August 2011, 04:29 PM   #700
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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=]here.[url/]
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