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Where are the ZV9 builders???
Where are the ZV9 builders???
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Old 15th January 2007, 06:24 AM   #21
Babowana is offline Babowana  South Korea
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Quote:
Originally posted by bontakun


I am shocked at what 5% variance means for some of these resistors. Like the 0.47R measured as 1.1R or higher. Just surprised about that.

Don't be surprised. It is due to additional resistance through DMM.
I usually use the method as shown in the attached sketch, where
we could choose the resistors within about 1% tolerance.


I hope this info will help.
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File Type: jpg selection of low value resistor.jpg (19.5 KB, 1704 views)
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Old 15th January 2007, 07:10 PM   #22
Phill is offline Phill  Mali
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hello

http://domainedupossible.free.fr/pag...ENV9/zenv9.htm

the sound is very good, but I do not have currently a speaker adapted ... ( 86 db....)

I tested on speaker 98 dB ....and ...

Phill
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Old 15th January 2007, 07:21 PM   #23
Blues is offline Blues  United States
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Quote:
Originally posted by Babowana



Don't be surprised. It is due to additional resistance through DMM.
I usually use the method as shown in the attached sketch, where
we could choose the resistors within about 1% tolerance.


I hope this info will help.

Make sure you also short your probes to get its resistance...some meters can be calibrated or zeroed to compensate the R of the probes.
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Old 15th January 2007, 09:03 PM   #24
MikeW is offline MikeW  United States
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I thought mine was a little flat so I changed the feedback resister to 100k. I also put a buffer in front of the amp. With the amp it has the same gain as a normal amp 28 or so db. The ZV9 is a very nice sounding amp. I woud like a couple more watts.
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Old 15th January 2007, 09:36 PM   #25
GRollins is offline GRollins  United States
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Quote:
Originally posted by MikeW
...I woud like a couple more watts. ...
I'm working on it...I'm working on it...
Them what's in a hurry can build a New-Tron. But that doesn't mean that there aren't other designs coming. Just got Logan put down for a nap. The rude little feller wanted to be fed. Imagine that!

Grey
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Old 16th January 2007, 03:13 PM   #26
Babowana is offline Babowana  South Korea
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Quote:
Originally posted by Babowana


Don't be surprised. It is due to additional resistance through DMM.
I usually use the method as shown in the attached sketch, where
we could choose the resistors within about 1% tolerance.

Kkkkk hhhhhhhh . . . I was wrong. Very sorry.
I should have wrote down as +/-5% tolerance.

I have thought another way to find similar values in five groups
I hope the attachment will well explain what I have thought about.
Of cource, if we have expensive precision ohm meter,
it would be the best solution . . .
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File Type: jpg finding 0.47r.jpg (79.1 KB, 1102 views)
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Old 16th January 2007, 04:21 PM   #27
flg is offline flg  United States
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More watts, ay Grey... Can't wait to see it... I've got a more watts circuit that seems to work, just not with the Aleph CS. I'm using L loading instead. Trying to work out a means to acquire the ideal L
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Old 16th January 2007, 11:39 PM   #28
GRollins is offline GRollins  United States
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flg,
Wind your own. Inductors are one of the few things we can make for ourselves.
I told my wife today that I feel as though I'm trying to pave a mile of road. Just a single mile. But...I'm only able to pave one foot per day, perhaps two feet if I'm lucky. The goal is clear. The execution is easy enough. But that 1'/day limitation is killing me.
Oh, well. If life were easy, I'd be like the hare--I'd get so far ahead that I'd take a nap and that wily tortoise would scoot past me.
Maybe I should simply plan on being the tortoise.

Grey
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Old 17th January 2007, 03:08 AM   #29
flg is offline flg  United States
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Yes, I realize that. However, although I've collected lots of useful components over the years, hundreds of feet of magnet wire wasn't one of them. Nor was any sort of core that might allow the use of less wire...
So, I wrote hammond regarding their 195T5 choke and it's suitabiliity to my project... No response yet??? But I think it might do the trick
Just don't have the $$$ to go to far with this idea right now and it seems like the big 100mH DC choke is as cost effective as any...
Got an interview tomorrow Maybe I'll get back to some income soon
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Old 17th January 2007, 03:29 AM   #30
GRollins is offline GRollins  United States
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Two words:
Surplus sites
MPJA and MECI for starters. Search keyword= Ferrite.
If need be, get your wire locally from motor shops, etc.

Grey
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