Re: Question: Why do you call "AGC" a simple automatic antenna "attenuator" in this forum? #ubitx #ubitxv6


SIMON ROSS <simonr5@...>
 

I used a simple circuit using a ldr and an led to attenuate the loud audio and also connected a meter. It works well. Vk3ye shows it on YouTube 


On 19 Nov 2020, at 08:55, Bob Lunsford via groups.io <nocrud222@...> wrote:


I tried the scheme with two computer switching diodes from the earphone lines to ground and it does work although not as effectively as I'd hoped. I'll prepare a headset to do this for me and I expect it to still work as designed with other applications. May have to change the connector, though, to avoid cutting the headphone line.

Bob — KK5R

On Thursday, November 19, 2020, 2:12:45 AM EST, Bill Cromwell <wrcromwell@...> wrote:


Hi,

I have done and will be doing it again. When very loud signals suddenly
appear in the cans, instead of making your ears bleed you will hear it
suddenly very distorted and maybe a little louder. That is your cue to
turn down the volume. It won't function like the AGC you are used to. It
will protect your hearing.

73,

Bill  KU8H

bark less - wag more

On 11/18/20 7:56 PM, Bob Lunsford via groups.io wrote:
> For headphones, I wonder if two diodes with polarities reversed from
> each other across the headphone line would provide some hearing
> protection...? Or a pair of reversed polarity in series if the volume
> were affected too much. Does this cause severe distortion? (I've read
> about doing this but never tried it.)
>
> By the way, what is "vogad"???
>
> Bob — KK5R
>
> On Wednesday, November 18, 2020, 7:38:16 PM EST, iz oos
> <and2oosiz2@...> wrote:
>
>
> Loris, would you think a vogad at the audio output could be a solution
> to save both sensitivity and hears to some extent?
>
> Il mer 18 nov 2020 06:10 PM Arv Evans <arvid.evans@...
> <mailto:arvid.evans@...>> ha scritto:
>
>    AAT (Automatic Attenuator Control)?
>    _._
>
>
>    On Wed, Nov 18, 2020 at 5:32 AM Bill Cromwell <wrcromwell@...
>    <mailto:wrcromwell@...>> wrote:
>
>        Hi Loris,
>
>        There are a lot of newbies here and they just don't know. Don't be
>        angry. Just help them alomng if they are actually open to help. I
>        started learning about physics and electronics in the early
>        1950s and I
>        still don't everything. I am more and moire aware of how much I
>        don't
>        know. I usually do know where to look:)
>
>        73,
>
>        Bill KU8H
>
>        bark less - wag more
>
>        On 11/18/20 7:17 AM, IW4AJR Loris wrote:
>          > Hi Bill ... I fully agree with you!
>          > What I am wondering is "why" this forum continues to call AGC
>        a very
>          > vulgar "ATTENUATOR" even if more or less automatic.
>          > 73 Loris
>          >
>
>
>
>
>
>





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