Re: Microphone w/ built in compression? “Lamplifier”
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FWIW:
I still use that technique to protect tweeters in DJ speakers... Op wo 13 apr. 2022 om 11:34 schreef Arjay 1949 < info@...>:
This technique reminded me of the same thing that was employed in Hammond organs, back in the day (1960s/70s).
They used light bulbs to 'limit' the drive to the inductive drivers on the spring reverb units.?
They were connected to the output of a power amp, and included the bulbs in the signal path itself.
As Jerry has already commented, using an audio signal to light an incandescent bulb requires a fair amount of power !? ??
The assembly in the sketch below was connected to the output of the reverb audio amp, so the 'sig. input' would normally have been a loudspeaker....
It used to alarm some customers that they could see an intermittent 'glow' under an amp chassis, when the service tech had the back off the instrument! :)
On Tue, Apr 12, 2022 at 11:12 PM, M H wrote:
Was looking around at passive limiters and such, and came across an interesting implementation in “Lamplifier Microphones”.? From what I can gather, the microphone has an internal preamp that lights a small incandescent bulb. Said bulb, as it starts to glow, becomes higher resistance to signal, functioning as a form of audio compression.
Just seemed clever in its simplicity.? Don’t know how it sounds though..? The website Lamplifier.com seems to be defunct and their contract info email box is full.? That might give me my verdict right there. ?
?Thought it might be fun to try with a tiny “grain-of wheat “ bulb..
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