[sdiy] Multiplier vs VCA

[Derek Holzer]

Hi Tim,

thanks for your clarifications. Just to inquire a little further:

Tim Daugard wrote:
> From: "Derek Holzer" <derek at umatic.nl>
> 
>> 1) Ability to use LFO as modulator for slow AM.
> 
> This module was created after reading my latest ARRL manual discussion 
> on AM and ring modulators. The waveforms out of it resemble that of a 
> ring modulator. This module avoids the cost of transformers. It also has 
> a wider bandwith than a transformer coupled ring modulator. It works at 
> DC (checked) to the end of the audio range and should work to the 
> bandwidth limit of the opamp!

So this multiplier could do a veeery slow "tremolo" amplitude modulation 
as well as space/radio noises? How slow an LFO have you gotten results 
out of this with, if you recall? Will breadboard soon and check for 
myself of course!

best,
D.

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