From mohammadaj at gmail.com  Sat Aug  1 00:28:42 2009
From: mohammadaj at gmail.com (mohamad al-jamal)
Date: Sat, 1 Aug 2009 02:28:42 +0300
Subject: [Ronja] nebulus test points don't match
Message-ID: <9061a4380907311628s473c24afj2749a72d6b59299c@mail.gmail.com>

Hi

I've just finished building my nebulus Tx , following the exact instructions
in the guide to the last detail , except for the zener , where i used a 7.3V
instead of 7.5
as i couldn't find one  . but the "DC - no signal" test points didn't  match
, i rechecked the connections , and tested the parts before placing them ,
and afterwords,
but there are differences , 1.3 V for P7 for example !! here are my results
:
P1   1mV
P2    5.55 V
P3    4.88
P4    5.58
P5    9.88
P6    4.21
P7    5.00
P8    0
P9    1mV
any help is highly appreciated
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From mohammadaj at gmail.com  Sat Aug  1 23:17:14 2009
From: mohammadaj at gmail.com (mohamad al-jamal)
Date: Sun, 2 Aug 2009 01:17:14 +0300
Subject: [Ronja] nebulus test points don't match
In-Reply-To: <9061a4380907311628s473c24afj2749a72d6b59299c@mail.gmail.com>
References: <9061a4380907311628s473c24afj2749a72d6b59299c@mail.gmail.com>
Message-ID: <9061a4380908011517n58e82275s7ed4dcc9fcf2b3e4@mail.gmail.com>

come on guys , i need help here


On Sat, Aug 1, 2009 at 2:28 AM, mohamad al-jamal <mohammadaj at gmail.com>wrote:

> Hi
>
> I've just finished building my nebulus Tx , following the exact
> instructions in the guide to the last detail , except for the zener , where
> i used a 7.3V instead of 7.5
> as i couldn't find one  . but the "DC - no signal" test points didn't
> match , i rechecked the connections , and tested the parts before placing
> them , and afterwords,
> but there are differences , 1.3 V for P7 for example !! here are my results
> :
> P1   1mV
> P2    5.55 V
> P3    4.88
> P4    5.58
> P5    9.88
> P6    4.21
> P7    5.00
> P8    0
> P9    1mV
> any help is highly appreciated
>
>
>
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From gullik.webjorn at corevalue.se  Sun Aug  2 00:20:05 2009
From: gullik.webjorn at corevalue.se (Gullik =?ISO-8859-1?Q?Webj=F6rn?=)
Date: Sun, 02 Aug 2009 01:20:05 +0200
Subject: [Ronja] nebulus test points don't match
In-Reply-To: <9061a4380908011517n58e82275s7ed4dcc9fcf2b3e4@mail.gmail.com>
References: <9061a4380907311628s473c24afj2749a72d6b59299c@mail.gmail.com>
	<9061a4380908011517n58e82275s7ed4dcc9fcf2b3e4@mail.gmail.com>
Message-ID: <1249168805.13750.26.camel@core-laptop>

On Sun, 2009-08-02 at 01:17 +0300, mohamad al-jamal wrote:
> come on guys , i need help here
> 
> 
> On Sat, Aug 1, 2009 at 2:28 AM, mohamad al-jamal
> <mohammadaj at gmail.com> wrote:
>         Hi 
>         
>         I've just finished building my nebulus Tx , following the
>         exact instructions in the guide to the last detail , except
>         for the zener , where i used a 7.3V instead of 7.5
>         as i couldn't find one  . but the "DC - no signal" test points
>         didn't  match , i rechecked the connections , and tested the
>         parts before placing them , and afterwords, 
>         but there are differences , 1.3 V for P7 for example !! here
>         are my results : 
>         P1   1mV
>         P2    5.55 V
>         P3    4.88
>         P4    5.58
>         P5    9.88
>         P6    4.21
>         P7    5.00
>         P8    0
>         P9    1mV
>         any help is highly appreciated 
>         
>         

	P1 = 1 mV ?? Do you have a proper AUI connected at coax input?
	P2 = 5.55 V, well, 7.3 - 0.7 = 6.6V, do you have 7.3 at D2?
	P3 = 4.88 V, well 5.55 - one VBE 0.7 V, seems OK
	P4 = 5.58 V, derived from P2, higher than P2 ???? with or without
signal ??
	P5 = 9.88 V, reasonable, 9.88n - 4.88 = 5 V over Q2 VCE
	P6 = 4.21 V, I should have expected same as P7, something taking
current, broken IC U1, U2 or U3??? 
	P7 = 5.00 V, 7.3 - 1.4 ( 2 * VBE) = 5.9, a little low, how much current
does nebulus take?
	P8 = 0, very reasonable with P6 at 4.21 V
	P9 = 1mV, well, if P8 is at 0, then P9 should also be 0 V, 
		since P9 is voltage drop over R17, and with no voltage 
		out of the driver ICs you do not get any current, thus 
		no voltage drop.

In all, your circuit looks good, BUT, it looks like your U1-U3 are
taking input current, which they should not, (P6=4.21 V) so maybee you
broke one of them. I would have expected P6 = P7 (+/-) 50 mV, with no
signal. IF you have a signal, the difference might be OK, depending
on signal duty cycle....

So, with input signal disconnected P6 = (almost) P7, WITH signal
lower, i.e. 4.21 V might be OK.

Hope this helps

Gullik
>         
> 
> 
> _______________________________________________
> Ronja mailing list
> Ronja at lists.pointless.net
> http://pointless.net/mailman/listinfo/ronja



From mohammadaj at gmail.com  Sun Aug  2 17:58:26 2009
From: mohammadaj at gmail.com (mohamad al-jamal)
Date: Sun, 2 Aug 2009 19:58:26 +0300
Subject: [Ronja] nebulus test points don't match
In-Reply-To: <1249168805.13750.26.camel@core-laptop>
References: <9061a4380907311628s473c24afj2749a72d6b59299c@mail.gmail.com>
	<9061a4380908011517n58e82275s7ed4dcc9fcf2b3e4@mail.gmail.com>
	<1249168805.13750.26.camel@core-laptop>
Message-ID: <9061a4380908020958y4fe7e2a5p142e38b774058292@mail.gmail.com>

thanks a lot , that was really helpful , i think where my problem is , the
zener i used isn't neither 7.5 nor 7.3 , it's 6.2 !! my supplier has gived
me the wrong zener . as for P6 , actually now it reads 4.96 . the previous
reading - the wrong one = 4.21 - was due to misplacing the prope of my
multimeter .
so everything adds up now .now my question is : will my nebulus work with
this zener ? fiding the 7.5 wasn't easy !!

On Sun, Aug 2, 2009 at 2:20 AM, Gullik Webj?rn
<gullik.webjorn at corevalue.se>wrote:

> On Sun, 2009-08-02 at 01:17 +0300, mohamad al-jamal wrote:
> > come on guys , i need help here
> >
> >
> > On Sat, Aug 1, 2009 at 2:28 AM, mohamad al-jamal
> > <mohammadaj at gmail.com> wrote:
> >         Hi
> >
> >         I've just finished building my nebulus Tx , following the
> >         exact instructions in the guide to the last detail , except
> >         for the zener , where i used a 7.3V instead of 7.5
> >         as i couldn't find one  . but the "DC - no signal" test points
> >         didn't  match , i rechecked the connections , and tested the
> >         parts before placing them , and afterwords,
> >         but there are differences , 1.3 V for P7 for example !! here
> >         are my results :
> >         P1   1mV
> >         P2    5.55 V
> >         P3    4.88
> >         P4    5.58
> >         P5    9.88
> >         P6    4.21
> >         P7    5.00
> >         P8    0
> >         P9    1mV
> >         any help is highly appreciated
> >
> >
>
>         P1 = 1 mV ?? Do you have a proper AUI connected at coax input?
>        P2 = 5.55 V, well, 7.3 - 0.7 = 6.6V, do you have 7.3 at D2?
>        P3 = 4.88 V, well 5.55 - one VBE 0.7 V, seems OK
>        P4 = 5.58 V, derived from P2, higher than P2 ???? with or without
> signal ??
>        P5 = 9.88 V, reasonable, 9.88n - 4.88 = 5 V over Q2 VCE
>        P6 = 4.21 V, I should have expected same as P7, something taking
> current, broken IC U1, U2 or U3???
>        P7 = 5.00 V, 7.3 - 1.4 ( 2 * VBE) = 5.9, a little low, how much
> current
> does nebulus take?
>        P8 = 0, very reasonable with P6 at 4.21 V
>        P9 = 1mV, well, if P8 is at 0, then P9 should also be 0 V,
>                since P9 is voltage drop over R17, and with no voltage
>                out of the driver ICs you do not get any current, thus
>                no voltage drop.
>
> In all, your circuit looks good, BUT, it looks like your U1-U3 are
> taking input current, which they should not, (P6=4.21 V) so maybee you
> broke one of them. I would have expected P6 = P7 (+/-) 50 mV, with no
> signal. IF you have a signal, the difference might be OK, depending
> on signal duty cycle....
>
> So, with input signal disconnected P6 = (almost) P7, WITH signal
> lower, i.e. 4.21 V might be OK.
>
> Hope this helps
>
> Gullik
> >
> >
> >
> > _______________________________________________
> > Ronja mailing list
> > Ronja at lists.pointless.net
> > http://pointless.net/mailman/listinfo/ronja
>
>
> _______________________________________________
> Ronja mailing list
> Ronja at lists.pointless.net
> http://pointless.net/mailman/listinfo/ronja
>
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From gullik.webjorn at corevalue.se  Mon Aug  3 07:58:07 2009
From: gullik.webjorn at corevalue.se (Gullik =?ISO-8859-1?Q?Webj=F6rn?=)
Date: Mon, 03 Aug 2009 08:58:07 +0200
Subject: [Ronja] nebulus test points don't match
In-Reply-To: <9061a4380908020958y4fe7e2a5p142e38b774058292@mail.gmail.com>
References: <9061a4380907311628s473c24afj2749a72d6b59299c@mail.gmail.com>
	<9061a4380908011517n58e82275s7ed4dcc9fcf2b3e4@mail.gmail.com>
	<1249168805.13750.26.camel@core-laptop>
	<9061a4380908020958y4fe7e2a5p142e38b774058292@mail.gmail.com>
Message-ID: <1249282687.8772.1.camel@core-laptop>

Put one or two diodes in series with the zener, each diode
will give you 0.6-0.7 V, i.e. 6.2 + (2*0.6) = 7.4.
Any small si diode will do. (check correct polarity!)

Gullik


On Sun, 2009-08-02 at 19:58 +0300, mohamad al-jamal wrote:
> thanks a lot , that was really helpful , i think where my problem is ,
> the zener i used isn't neither 7.5 nor 7.3 , it's 6.2 !! my supplier
> has gived me the wrong zener . as for P6 , actually now it reads
> 4.96 . the previous reading - the wrong one = 4.21 - was due to
> misplacing the prope of my multimeter . 
> so everything adds up now .now my question is : will my nebulus work
> with this zener ? fiding the 7.5 wasn't easy !! 
> 
> On Sun, Aug 2, 2009 at 2:20 AM, Gullik Webj?rn
> <gullik.webjorn at corevalue.se> wrote:
>         
>         On Sun, 2009-08-02 at 01:17 +0300, mohamad al-jamal wrote:
>         > come on guys , i need help here
>         >
>         >
>         > On Sat, Aug 1, 2009 at 2:28 AM, mohamad al-jamal
>         > <mohammadaj at gmail.com> wrote:
>         >         Hi
>         >
>         >         I've just finished building my nebulus Tx ,
>         following the
>         >         exact instructions in the guide to the last detail ,
>         except
>         >         for the zener , where i used a 7.3V instead of 7.5
>         >         as i couldn't find one  . but the "DC - no signal"
>         test points
>         >         didn't  match , i rechecked the connections , and
>         tested the
>         >         parts before placing them , and afterwords,
>         >         but there are differences , 1.3 V for P7 for
>         example !! here
>         >         are my results :
>         >         P1   1mV
>         >         P2    5.55 V
>         >         P3    4.88
>         >         P4    5.58
>         >         P5    9.88
>         >         P6    4.21
>         >         P7    5.00
>         >         P8    0
>         >         P9    1mV
>         >         any help is highly appreciated
>         >
>         >
>         
>         
>                P1 = 1 mV ?? Do you have a proper AUI connected at coax
>         input?
>                P2 = 5.55 V, well, 7.3 - 0.7 = 6.6V, do you have 7.3 at
>         D2?
>                P3 = 4.88 V, well 5.55 - one VBE 0.7 V, seems OK
>                P4 = 5.58 V, derived from P2, higher than P2 ???? with
>         or without
>         signal ??
>                P5 = 9.88 V, reasonable, 9.88n - 4.88 = 5 V over Q2 VCE
>                P6 = 4.21 V, I should have expected same as P7,
>         something taking
>         current, broken IC U1, U2 or U3???
>                P7 = 5.00 V, 7.3 - 1.4 ( 2 * VBE) = 5.9, a little low,
>         how much current
>         does nebulus take?
>                P8 = 0, very reasonable with P6 at 4.21 V
>                P9 = 1mV, well, if P8 is at 0, then P9 should also be 0
>         V,
>                        since P9 is voltage drop over R17, and with no
>         voltage
>                        out of the driver ICs you do not get any
>         current, thus
>                        no voltage drop.
>         
>         In all, your circuit looks good, BUT, it looks like your U1-U3
>         are
>         taking input current, which they should not, (P6=4.21 V) so
>         maybee you
>         broke one of them. I would have expected P6 = P7 (+/-) 50 mV,
>         with no
>         signal. IF you have a signal, the difference might be OK,
>         depending
>         on signal duty cycle....
>         
>         So, with input signal disconnected P6 = (almost) P7, WITH
>         signal
>         lower, i.e. 4.21 V might be OK.
>         
>         Hope this helps
>         
>         Gullik
>         >
>         >
>         >
>         > _______________________________________________
>         > Ronja mailing list
>         > Ronja at lists.pointless.net
>         > http://pointless.net/mailman/listinfo/ronja
>         
>         
>         _______________________________________________
>         Ronja mailing list
>         Ronja at lists.pointless.net
>         http://pointless.net/mailman/listinfo/ronja
> 
> 
> _______________________________________________
> Ronja mailing list
> Ronja at lists.pointless.net
> http://pointless.net/mailman/listinfo/ronja



From mohammadaj at gmail.com  Mon Aug  3 20:15:39 2009
From: mohammadaj at gmail.com (mohamad al-jamal)
Date: Mon, 3 Aug 2009 22:15:39 +0300
Subject: [Ronja] nebulus test points don't match
In-Reply-To: <1249282687.8772.1.camel@core-laptop>
References: <9061a4380907311628s473c24afj2749a72d6b59299c@mail.gmail.com>
	<9061a4380908011517n58e82275s7ed4dcc9fcf2b3e4@mail.gmail.com>
	<1249168805.13750.26.camel@core-laptop>
	<9061a4380908020958y4fe7e2a5p142e38b774058292@mail.gmail.com>
	<1249282687.8772.1.camel@core-laptop>
Message-ID: <9061a4380908031215u77ad5885udfc3f9a5c2c32678@mail.gmail.com>

it's a simple , genius solution ! thanks a lot .

On Mon, Aug 3, 2009 at 9:58 AM, Gullik Webj?rn
<gullik.webjorn at corevalue.se>wrote:

> Put one or two diodes in series with the zener, each diode
> will give you 0.6-0.7 V, i.e. 6.2 + (2*0.6) = 7.4.
> Any small si diode will do. (check correct polarity!)
>
> Gullik
>
>
> On Sun, 2009-08-02 at 19:58 +0300, mohamad al-jamal wrote:
> > thanks a lot , that was really helpful , i think where my problem is ,
> > the zener i used isn't neither 7.5 nor 7.3 , it's 6.2 !! my supplier
> > has gived me the wrong zener . as for P6 , actually now it reads
> > 4.96 . the previous reading - the wrong one = 4.21 - was due to
> > misplacing the prope of my multimeter .
> > so everything adds up now .now my question is : will my nebulus work
> > with this zener ? fiding the 7.5 wasn't easy !!
> >
> > On Sun, Aug 2, 2009 at 2:20 AM, Gullik Webj?rn
> > <gullik.webjorn at corevalue.se> wrote:
> >
> >         On Sun, 2009-08-02 at 01:17 +0300, mohamad al-jamal wrote:
> >         > come on guys , i need help here
> >         >
> >         >
> >         > On Sat, Aug 1, 2009 at 2:28 AM, mohamad al-jamal
> >         > <mohammadaj at gmail.com> wrote:
> >         >         Hi
> >         >
> >         >         I've just finished building my nebulus Tx ,
> >         following the
> >         >         exact instructions in the guide to the last detail ,
> >         except
> >         >         for the zener , where i used a 7.3V instead of 7.5
> >         >         as i couldn't find one  . but the "DC - no signal"
> >         test points
> >         >         didn't  match , i rechecked the connections , and
> >         tested the
> >         >         parts before placing them , and afterwords,
> >         >         but there are differences , 1.3 V for P7 for
> >         example !! here
> >         >         are my results :
> >         >         P1   1mV
> >         >         P2    5.55 V
> >         >         P3    4.88
> >         >         P4    5.58
> >         >         P5    9.88
> >         >         P6    4.21
> >         >         P7    5.00
> >         >         P8    0
> >         >         P9    1mV
> >         >         any help is highly appreciated
> >         >
> >         >
> >
> >
> >                P1 = 1 mV ?? Do you have a proper AUI connected at coax
> >         input?
> >                P2 = 5.55 V, well, 7.3 - 0.7 = 6.6V, do you have 7.3 at
> >         D2?
> >                P3 = 4.88 V, well 5.55 - one VBE 0.7 V, seems OK
> >                P4 = 5.58 V, derived from P2, higher than P2 ???? with
> >         or without
> >         signal ??
> >                P5 = 9.88 V, reasonable, 9.88n - 4.88 = 5 V over Q2 VCE
> >                P6 = 4.21 V, I should have expected same as P7,
> >         something taking
> >         current, broken IC U1, U2 or U3???
> >                P7 = 5.00 V, 7.3 - 1.4 ( 2 * VBE) = 5.9, a little low,
> >         how much current
> >         does nebulus take?
> >                P8 = 0, very reasonable with P6 at 4.21 V
> >                P9 = 1mV, well, if P8 is at 0, then P9 should also be 0
> >         V,
> >                        since P9 is voltage drop over R17, and with no
> >         voltage
> >                        out of the driver ICs you do not get any
> >         current, thus
> >                        no voltage drop.
> >
> >         In all, your circuit looks good, BUT, it looks like your U1-U3
> >         are
> >         taking input current, which they should not, (P6=4.21 V) so
> >         maybee you
> >         broke one of them. I would have expected P6 = P7 (+/-) 50 mV,
> >         with no
> >         signal. IF you have a signal, the difference might be OK,
> >         depending
> >         on signal duty cycle....
> >
> >         So, with input signal disconnected P6 = (almost) P7, WITH
> >         signal
> >         lower, i.e. 4.21 V might be OK.
> >
> >         Hope this helps
> >
> >         Gullik
> >         >
> >         >
> >         >
> >         > _______________________________________________
> >         > Ronja mailing list
> >         > Ronja at lists.pointless.net
> >         > http://pointless.net/mailman/listinfo/ronja
> >
> >
> >         _______________________________________________
> >         Ronja mailing list
> >         Ronja at lists.pointless.net
> >         http://pointless.net/mailman/listinfo/ronja
> >
> >
> > _______________________________________________
> > Ronja mailing list
> > Ronja at lists.pointless.net
> > http://pointless.net/mailman/listinfo/ronja
>
>
> _______________________________________________
> Ronja mailing list
> Ronja at lists.pointless.net
> http://pointless.net/mailman/listinfo/ronja
>
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