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Help with MOTM 101
2010-02-25 by Miguel Mendoza
Hello, I'm wondering if my MOTM 101 is working fine. All
the sections work but I have always been thinking that the SH
output has a very smooth, subtle response. Even I only coud hear small
pitch changes on a VCO if I put the SH level at 10.
Today I connected it to my 730 DIV MOD input and it
didn't change any value. Other signals like LFOs were modulating de /N output
but the SH does nothing.
I checked the SH output with a digital voltimeter
and it was changing values at every clock pulse as expected but all of
them were positive from 0 to 3.4 v. aprox. I was checking it for a while
and I couldn't read any higher than 3.4 v. and all of them were
positive. The level pot was at 10 all the time.
So, anybody can say if this is normal? Any
tip?
Thanks in advance.
Miguel.
Re: [motm] Help with MOTM 101
2010-02-26 by Richard Brewster
Have you tried patching a large signal into the S&H input? Patch the Triangle output of a MOTM-300. Run the 300 at the lowest frequency. If you're not getting any negative output from the 101, something is wrong with the sample and hold section. If this test works, there may be a problem with the Pink noise on the 101. Try adjusting the noise gain trimpot, TP1. Richard Brewster http://pugix.com Miguel Mendoza wrote:
Show quoted textHide quoted text
> > > Hello, I'm wondering if my MOTM 101 is working fine. All the sections > work but I have always been thinking that the SH output has a very > smooth, subtle response. Even I only coud hear small pitch changes on > a VCO if I put the SH level at 10. > > Today I connected it to my 730 DIV MOD input and it didn't change any > value. Other signals like LFOs were modulating de /N output but the SH > does nothing. > > I checked the SH output with a digital voltimeter and it was > changing values at every clock pulse as expected but all of them were > positive from 0 to 3.4 v. aprox. I was checking it for a while and I > couldn't read any higher than 3.4 v. and all of them were > positive. The level pot was at 10 all the time. > > So, anybody can say if this is normal? Any tip? > > Thanks in advance. > > Miguel. > > >
Re: [motm] Help with MOTM 101
2010-02-26 by Jason Proctor
also i'm suspicious that giving the 101 CVs of 0-3.4v is resulting in small pitch changes only. that should be a 3.4 octave range. does the 101 CV input work reliably with other CV sources?
Show quoted textHide quoted text
>Have you tried patching a large signal into the S&H input? Patch the >Triangle output of a MOTM-300. Run the 300 at the lowest frequency. If >you're not getting any negative output from the 101, something is wrong >with the sample and hold section. If this test works, there may be a >problem with the Pink noise on the 101. Try adjusting the noise gain >trimpot, TP1. > >Richard Brewster >http://pugix.com > >Miguel Mendoza wrote: >> >> >> Hello, I'm wondering if my MOTM 101 is working fine. All the sections >> work but I have always been thinking that the SH output has a very >> smooth, subtle response. Even I only coud hear small pitch changes on >> a VCO if I put the SH level at 10. >> >> Today I connected it to my 730 DIV MOD input and it didn't change any >> value. Other signals like LFOs were modulating de /N output but the SH >> does nothing. >> >> I checked the SH output with a digital voltimeter and it was >> changing values at every clock pulse as expected but all of them were >> positive from 0 to 3.4 v. aprox. I was checking it for a while and I >> couldn't read any higher than 3.4 v. and all of them were >> positive. The level pot was at 10 all the time. >> >> So, anybody can say if this is normal? Any tip? >> >> Thanks in advance. >> >> Miguel. >> >> >> > > > >------------------------------------ > >Yahoo! Groups Links > > >
Re: [motm] Help with MOTM 101
2010-02-26 by Miguel Mendoza
Ok, I'll do those checkings. Anyway, I think that I'll
search for bad contacts because suddenly yesterday the 101 was working fine
in the morning but not in the afternoon...
Thanks a lot to all.
Regards!
Miguel.
From: Jason Proctor
Sent: Friday, February 26, 2010 3:53 AM
To: MOTM
Subject: Re: [motm] Help with MOTM 101
also i'm suspicious that giving the 101 CVs of 0-3.4v is resulting in
small pitch changes only. that should be a 3.4 octave range.
does the
101 CV input work reliably with other CV sources?
>Have you tried
patching a large signal into the S&H input? Patch the
>Triangle output
of a MOTM-300. Run the 300 at the lowest frequency. If
>you're not getting
any negative output from the 101, something is wrong
>with the sample and
hold section. If this test works, there may be a
>problem with the Pink
noise on the 101. Try adjusting the noise gain
>trimpot,
TP1.
>
>Richard Brewster
>http://pugix.com
>
>Miguel Mendoza
wrote:
>>
>>
>> Hello, I'm wondering if my MOTM 101
is working fine. All the sections
>> work but I have always been
thinking that the SH output has a very
>> smooth, subtle response. Even
I only coud hear small pitch changes on
>> a VCO if I put the SH level
at 10.
>>
>> Today I connected it to my 730 DIV MOD input and
it didn't change any
>> value. Other signals like LFOs were modulating
de /N output but the SH
>> does nothing.
>>
>> I
checked the SH output with a digital voltimeter and it was
>> changing
values at every clock pulse as expected but all of them were
>>
positive from 0 to 3.4 v. aprox. I was checking it for a while and I
>>
couldn't read any higher than 3.4 v. and all of them were
>> positive.
The level pot was at 10 all the time.
>>
>> So, anybody can
say if this is normal? Any tip?
>>
>> Thanks in
advance.
>>
>>
Miguel.
>>
>>
>>
>
>;
>
>------------------------------------
>;
>Yahoo!
Groups Links
>
>
>