Posted by Richard Crowley on 08/28/07 19:02

"Rick Merrill" wrote ...
> If you Could put them in series (presently in parallel) then
> the change would be 2x/(1/2).

The formula for calculating series resistance is simply
to add them together. Rseries = Ra + Rb
For parallel it is: Rparallel = 1/(1/Ra + 1/Rb)

http://physics.bu.edu/py106/notes/Circuits.html

>> Padding the mixer line-level output down to mic level
>> should not be dependent on the input impedance of
>> the camcorder. So impedance is a very minor factor
>> in your situation as you have explained it here.
>>
>>> Would that be a step in the right direction?
>>
>> Padding the line level down to mic level would be the
>> right direction. Using shielded cable would definitely
>> be the right direction.
>>
>> You could even consider recording the audio on some
>> other machine (that doesn't have AGC), but we don't
>> know what your production flow is and whether you
>> could accommodate separate sound recording? And
>> we don't even know what you are producing and how
>> much of a problem the "pumping" is?
>
> it's not much of a problem - just an annoyance to those
> of us who hear it / watch it.
>
> The dual input idea is a great one - and easy to mix in post, if I
> remember!
>
> Where can I get a nice, flexible shielded cable? Anybody got 25' to spare?

Any old shielded cable would work. Many of us have such stuff in
our junk-boxes. If you are in the PDX area I'll make you a cable.
Else you can almost certainly acquire the necessary cable and
adapters, etc. at a consumer electronics/stereo shop (Radio
Shack, et.al.)

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