[sdiy] Resistors similar to vintage Allen-Bradley...

[Jean-Pierre Desrochers]

I notice Arp VCF submodules that were made in the late 70's Odyssey's (and 
others Arp's..)
had all their 5% resitors carbon type (Allen Bradley) vertically mounted.
Only some few resistors were 1% and intended for the voltage controled part.
I can remember these VCF's had very nice sound and feel...

JP

----- Original Message ----- 
From: "cheater cheater" <cheater00 at gmail.com>
To: "Dave Kendall" <davekendall at ntlworld.com>
Cc: "Synth DIY List" <synth-diy at dropmix.xs4all.nl>
Sent: Friday, February 08, 2013 2:18 AM
Subject: Re: [sdiy] Resistors similar to vintage Allen-Bradley...


> Hi Dave,
> really interesting article, I have all but forgotten about the
> dependency of resistance on voltage in a carbon resistor.
>
> However, the author does jump to conclusion. Having found one effect
> which works very notably on signals in the high-voltage range, he
> concludes there is no unusual effect in other ranges. He doesn't
> explain the inner workings of the mechanism he has found either.
>
> One could easily imagine a fun carbon-resistor filter :) Or maybe
> resistor-ladder :) I wonder with what circuit you could maximize the
> voltage-dependency of resistance.
>
> Cheers,
> D.
>
> On Thu, Feb 7, 2013 at 8:59 PM, Dave Kendall <davekendall at ntlworld.com> 
> wrote:
>> An article that may be of interest here;
>> http://www.geofex.com/article_folders/carbon_comp/carboncomp.htm
>>
>>
>> cheers,
>> Dave
>>
>>
>> On 7 Feb 2013, at 13:29, Jean-Pierre Desrochers wrote:
>>
>>> Hi list,
>>>
>>> I just discovered the following resistors line from
>>> Stackpole Electronics Inc sold at Digikey:
>>>
>>> http://www.seielect.com/catalog/SEI-RC.pdf
>>>
>>> They have exactly the same look of 60's 70's Allen-Bradley type.
>>> Do anybody have something to share about these resistors ?
>>> I'm considering to buy some in the next days..
>>> 1/4w for my synth projects and 1/2w for my tube amp restorations..
>>>
>>> JP
>>>
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