13 Dollars for an electronic switch ?? (was: 4066's. Eat em up, Yum)

Paul Perry pfperry at melbpc.org.au
Thu Aug 14 05:06:44 CEST 1997


At 11:29 AM 14/08/97 +0930, The Dark force of dance batzman wrote:

>Ooo Ooo. And another chip I just thought of. Once again on the expensive
>side but these guys are better than OTAs. It's a little 8 pin VCA chip from
>Motorola. Now what's it called? Let me look it up here. MC3340 that's the
>one. Only the VCA stands for Voltage Controlled _Attenuator_. Rather than
>Amplifier. You only get one per package but because they're an attenuator
>rather than an amplifier they're real quiet. I've got 3 of 'em somewhere.
>Back in the days when you could get them.

........MC3340? these are IMHO shite......
damn near reduced me to tears until I realised that the control signal
just pours right thru to the output.....they might be ok for their intended
application,
domestic gear with a remote dc control voltage from a pot, but believe me 
hit the control pin with a frequency above one wrs (wrist thrn /second) and
it is thump city.

National make a perfectly good digitally controled attenuator series with mute,
of course single wire digital serial control, with a clever strategy so you can
hang a number in series.....helps the layout i suppose. (up to 3 per pack)

paul perry melbourne australia not florida

 Remember,today will be somebody's "good old days"




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