[sdiy] Having trouble sending to SDIY

[Nicholas Keller]

Thanks for your replies!  I did post another question since the Vpp thread.  It was titled something like "ladder filter mod".

I was asking if it was possible to insert some switches into a ladder filter to remove some "rungs" and achieve something like a 2-pole response.  I posted two schematic links, one of a Minimoog filter and one of an ARP.  Both have a series of resistors along the side of the transistor ladder which I assume act as voltage dividers....but I don't know.  I wondered if it was important to switch out particular rungs, if it is even possible.  I did do something like this to my Doepfer A-102 Diode Ladder filter, but it's been some time since.  Perhaps this is foolhardy and blasphemous, but I was considering modding the filter in my TTSH to allow for a "12dB" slope but I don't want to be the guy that posts that schematic online.  I believe we were asked not to make it public, but it is almost exactly like the ARP filter I posted just with different resistor values 

Cheers!
Nick



> On Jul 26, 2014, at 2:52 PM, KA4HJH <ka4hjh at gmail.com> wrote:
> 
> 
> On Jul 26, 2014, at 1:24 PM, René Schmitz <uzs159 at uni-bonn.de> wrote:
> 
>>>> I posted a question last week or so and never got a response.  I just assumed either no one was interested ... or it was a stupid question!
>>> 
>>> Or too difficult?
>>> What was the question again?
>> 
>> No, it didn't come through. At least I don't see it.
> 
> 
> I received four messages in the 11th and one on the 12th, all about measuring Vpp. Nothing after that.
> 
> 
> Terry Bowman, KA4HJH
> "The Mac Doctor"
> 
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