Please forgive my novice inquiry, I'm only part way through the ARRL
Understanding Basic Electronics book....and I hate mathematics, so it is
slow going.
Trying to understand the schematic in your article, and looking at all
those capacitors… Am I to understand this is a variable filter, meaning
it covers a variable range? I make out two transformers, but I don't
see anything that might constitute a variable control, so I'm assuming
this is a single level filter – i.e., one that I can put in the audio
circuit, or take out, but that's all I can do – you cannot shape or
very it in any way. It is just that all those little capacitors lined
up at the bottom of the schematic sort of suggest you are tapping at
different levels, but I don't see any way to control that.
Is this correct? Thank you for your consideration.
Happy Trails.
======================= Richards / K8JHR =========================
On 1/28/2011 12:25 AM, Dr. Gerald N. Johnson wrote:
> I use an external speaker passive low pass filter to tone down high
> frequency howling in my receiver audio
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