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AF gain volume during TX varies with power

 

CW OP, firmware 1.16.06: I know the AF Gain has two independent settings, one for adjusting RX and one for TX sidetone volume. Normally, I have operated the TX-500 at 100% power (sometimes down to 80%). I now have a PA500 amp and so I turned power down to (10%) on the TX-500 (by the way, it's more than 1W, more like 2W). What I noticed is the AF Gain during TX (sidetone volume) varies with the radio's power. At 10% the volume in my earphones is noticeably lower than at 100%. Has anyone else noticed this and is it normal?
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73, Norm/KC1BMD
 

Maybe I'm the only one to observe it?
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73, Norm/KC1BMD
 

Same here Norm. I read an explanation some time back but can't remember exactly what it was. Something to do with the power adjustment operating at a couple of different points in the output chain if I remember correctly.

73 M3KXZ

On Wed, 5 Apr 2023, 20:25 Norm - KC1BMD, <noka@...> wrote:
Maybe I'm the only one to observe it?
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73, Norm/KC1BMD

 

Thanks Pete. I tried searching but nothing yet on it.
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73, Norm/KC1BMD
 

I asked Roman (Lab599 support) about this several months ago but never got a reply. I sent the question in again today.
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73, Norm/KC1BMD
 

Fw rev. is now 1.23.09. I never got a reply from Lab599 after multiple attempts. Are there any other CW ops experiencing this? I cannot understand why anyone would want the AF Gain to be lowered when the power output is lowered.
?
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73, Norm/KC1BMD
 

Yeah, I've noticed it too.?
 

Funny, I never noticed that because I run mine at full power all the time ;)
 

It's always been like that, as far as I remember. Not exactly life or death stuff but a minor annoyance nonetheless.?

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