[BC] Achieving good S/N

[Phil Alexander]

On 27 Dec 2005 at 3:49, khcs at juno.com wrote:

> Could very well have been a Gates Sta-Level.  It would do something like that.  
> If the jock had several seconds of dead air and then hit the mic key, there 
> would be a loud "whomp" from having the compressor wide open.  No gating at all.  
> That would come later, with the CBS Audimax.

The Sta-level was a simple tube compressor with a push-pull output and a
dual diode (6AL5) bias generator. In the days before FM processors and
limiters it worked great for FM and gave a tremendous LOUD sound on top 40
without pumping if you rolled off the low end of the input to the bias
generator by cutting the capacity of the coupling caps by about 90%. It
was also possible to play with the time constant in the bias gen output
to speed up the attack slightly. However, too much and you could hear
the mid-range dominating the high end if you listened carefully. Even
before Audimax-Volumax, it was my secret weapon in the early '60's - 
yes, doing top-40 on FM even then. <g>


Phil Alexander, CSRE, AMD
Broadcast Engineering Services and Technology 
(a Div. of Advanced Parts Corporation) 
Ph. (317) 335-2065   FAX (317) 335-9037





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