AVLC Automatic Volume Limit Control

Mike - N8MSA

I think that having more adjustment is the answer, as the proposed AVLC is really nothing more than an AGC mode.

73,

Mike - N8MSA

Steve G1XOW

To me this is a good idea to offer max audio level (for ear protection, not automatic)...why?  

Recently I have been using AGC-T set to "off" so that I can hear some of the very very weak South Pacific DXpeds. They have often been just s0-s1 here on SSB (almost directly over the pole). Turning AGC-T off can make all the difference between just noise and just being able to copy them. Having it on at 100% (fast), or lowered to the noise floor method doesn't achieve the same result. I'd say there is still about 3db more to be had by turning it off in those ultra-weak situations.

So, why is it a problem: well, when you have AGC-T off and working split things are fine and you can squeeze that that last bit of juice out of the flex. As a keen DX chaser, I am used to straining to hear what is going on at the noise floor. But, then some muppet calls on the DX freq at s9+20 without split, and thus blows your eardrums in to the next county. I have actually had this happen twice now, and the result is severe ringing in the ears all day curtesy of some IQ0 not knowing how to use split.

Cheers, Steve G1XOW

Ted_Spiegel_NX6C

Eric,

  Your suggestion:

"I think what I would suggest may actually seem counterintuitive.  I would suggest that in order to protect your ears, you actually want to push the weak signals UP to the same limited signal target as the strong signals by turning the AGC-T level UP (rather than setting AGC to off).  You may then need to adjust your Slice volume and/or your master volume down, but I think this will give you the protection you are looking for."

This works for me when listening for weak signals when occasional strong signals occur.

Thanks,
Ted
NX6C

W9OY

I was thinking what m..ight work it to have a db differential between the noise floor and some value, say 30 db. The value could be set by the user. If the value was exceeded the agc would turn on. You would reset to agc off to reset the limit 73. W9OY

KC2QMA_John

The obvious solution is the addition of a AVC (Automatic Volume control), Audio Limiter, Compressor what every you want to call it but it is separate from the AGC-T control.

When I have time I will grab one of my Audio limiters connect it to the Audio output on the back of the flex then out to the speakers and demonstrate how this works and is DIFFERENT FROM USING THE AGC-T CONTROL.