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Old 7th June 2007, 09:49 PM   #81
Manu is offline Manu  Europe
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Quote:
Originally posted by twitchie
Hi Manuel,

I don't have 1M and 10ohm resistors

I etched it, but looking at it, I'm not that happy with it - I think the traces are too close together, although I did go as far as drilling and putting on the top layer graphics.

I started changing the layout again today.

Just wondering if anyone else has tried this one yet and if anyone has any impressions yet?

Stephen

My boards are so far populated. I hope I can make somme tests tomorrow after work and post some impressions.


Many thanks to you, Mr. pass.

Manuel
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Old 7th June 2007, 10:16 PM   #82
Nelson Pass is offline Nelson Pass  United States
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Jfet BOZ
Quote:
Originally posted by Vix
since it works fine with 16v supply and is not (milli) amperage hungry, what about battery operation?
Since it only draws 5 mA, I suggest a 15V battery from Radio
Shack.

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Old 7th June 2007, 10:20 PM   #83
jacco vermeulen is offline jacco vermeulen  Netherlands
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Quote:
Originally posted by vdi_nenna
but I held on
Vince,

a few years ago i bought a +10k package of metalfilms by the cheap, including values such as 1M.
Not that i was totally out of resistors, think the deal on Russian made resistors i couldn't resist was a couple of months before the big score.
Sooner or later, they always come to good use.
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Old 8th June 2007, 01:21 AM   #84
vdi_nenna is online now vdi_nenna  United States
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Quote:
Sooner or later, they always come to good use.
Exactly! Now I'm waiting for a project where I can use that 250k Alps pot with dented rotation. Maybe I'll have to visit the tube forum for that.

Wait, did some say this thing runs off of 15v??
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Old 8th June 2007, 07:30 AM   #85
G33/33 is offline G33/33  Indonesia
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Quote:
Originally posted by Nelson Pass



........ If we want to add to this circuit for better performance,
there are other ways to go.

How about cascoding ala Mr. Borbely ? any advantages / disadvantages using this arrangement ?



rgds,
G33/33
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Old 8th June 2007, 09:45 AM   #86
Babowana is offline Babowana  South Korea
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Quote:
Originally posted by Nelson Pass


volts output.



Thanks, Papa, understood as the output at the source . . .

JFET BOZ looks like a joke. But, I couldn't laugh.
Actually, it looks like a Joker who scaring me.

Too simple . . . too simple . . .
What do you need more . . . ?


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Old 8th June 2007, 09:52 AM   #87
Zen Mod is online now Zen Mod  Serbia
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Jfet BOZ
Quote:
Originally posted by Babowana



Thanks, Papa, understood as the output at the source . . .

JFET BOZ looks like a joke. But, I couldn't laugh.
Actually, it looks like a Joker who scaring me.

Too simple . . . too simple . . .
What do you need more . . . ?



hehe
sound of one hand clapping........

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Old 8th June 2007, 11:53 AM   #88
Vix is offline Vix  Yugoslavia
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It all started with one hand.....(SE first, then came push-pull)...
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Old 8th June 2007, 12:44 PM   #89
maxpou is offline maxpou  Canada
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Hi M. Pass,
this is my first preamp and i would like to know if Q2 is OK? Thank You! Maxpou
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Old 8th June 2007, 01:27 PM   #90
Babowana is offline Babowana  South Korea
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Use one and save one for me free. Thanks!


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