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Old 12th September 2005, 02:00 AM   #11
Variac is offline Variac  United States
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Pass Linsley Hood= John Linsley Hood's illigitimate younger brother?
Until recently never mentioned in polite society, the secret is now out!

A very similar situation to PDQ Bach!
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Old 12th September 2005, 04:09 AM   #12
paulb is offline paulb  Canada
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Nelson, have you any pictures of the internals, specifically the point-to-point wiring?
[you did ask for editorial comments...]
Does it look like the A-40 prototype?
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Old 12th September 2005, 06:28 AM   #13
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Hi Nelson,

Even if I fully understand you saying I grew tired of telling the readers how wonderful it sounds. . . ., I do not want to see you saying so.

Nobody listening to you . . .?

Sadly, among other things, I know there are few people who praise that mine has wonderful or better than the other, just by nothing but writing ill of the other’s name. Your projects are sometimes things offered in such sacrifice. It means that yours are elegant and wonderful to their jealous minds.

You are different from them. I have never seen that you are comparing yours with others to the public. Nevertheless, I have seen that many audio diyers love your projects and build lot.

Regards
jH
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Old 12th September 2005, 08:20 AM   #14
Fuling is offline Fuling  Sweden
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Some years ago I drew a circuit quite similar to that one but with BJTs, but I thought it would never work so I didn´t bother to try it out. Feels like I have to build this one some day.
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Old 12th September 2005, 09:40 AM   #15
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I was just about to download the datasheet for the IRF244 and found it is now obsolete. I guess it may be still available for now.

http://ec.irf.com/v6/en/US/adirect/i...eryName=irf244

You think they would give a suggested replacement for idiot's like me who don't have a clue.

Anyone have the pdf?

Thanks
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Old 12th September 2005, 10:17 AM   #16
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Hi, JH,

It seems you got another homework
I would say, you have to finish this homework, because this is T H E homework.

Mr. Pass,

I'm confused. With this quality of "homework", you should be able to make commercial product from it (another FirstWatt maybe?), but you decided to put it as DIY project?
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Old 12th September 2005, 11:12 AM   #17
Vix is online now Vix  Yugoslavia
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Hi Nelson,

On page 7 I read “ P1, R6 and C4 form a filter to take out power supply noise..." On the schematic (Fig. 8) it is C5?

Thank you very much for publishing the article. I was not expecting that for at least a couple of weeks. In fact, I expected that you'll publish only the simplified schematic, and a User manual. I also thought this was going to be another Firstwatt product...But you surprised all of us.

Shall we dare to think what's gonna be next? I wouldn't, not before I try this one

Thank you!

Vix
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Old 12th September 2005, 11:12 AM   #18
Magura is offline Magura  Denmark
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Quote:
Originally posted by Greg Erskine
I was just about to download the datasheet for the IRF244 and found it is now obsolete. I guess it may be still available for now.

http://ec.irf.com/v6/en/US/adirect/i...eryName=irf244

You think they would give a suggested replacement for idiot's like me who don't have a clue.

Anyone have the pdf?

Thanks

IRFP244

Magura
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Old 12th September 2005, 11:50 AM   #19
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Quote:
I was just about to download the datasheet for the IRF244 and found it is now obsolete. I guess it may be still available for now.

http://ec.irf.com/v6/en/US/adirect/...ueryName=irf244

You think they would give a suggested replacement for idiot's like me who don't have a clue.
You could probably use IRFP150, IRFP140, IRFP240, IRFP250, IRFP3710, IRFP054 too name a few. I dont think its very important, but you will get better specs with lower voltage rating and higher transconductance. Read the early papers on the Zen. Mr Pass writes a lot about the devices there.
If I could get some of them the IRFP044 or 054 would be my choice.
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Old 12th September 2005, 12:10 PM   #20
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Hi Lumanauw,

He is a bad teacher, and I am a bad student too.
I'm too busy in enjoying F1/J-Low. No time to do THE homework.
You know? I used to threat my class mates do my homework.
This time you are, Lumanauweeeeeeeeeeee!
I will give you choco candies after you finish my homework.

Regards
jH
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