[ARC5] SCR-274N side tone level?

AKLDGUY neilb0627 at gmail.com
Sun Feb 10 01:24:57 EST 2019


David
What do you mean by "abandoning the sidetone line"? Do you mean leaving it
unconnected and unterminated?

Neil ZL1ANM


On Sunday, February 10, 2019, David Stinson <arc5 at ix.netcom.com> wrote:

> Caution:
> If you try putting a pot across the sidetone winding, rather than in
> series with it,
>
> the impedance change this makes is reflected into the other windings of
> the
>
> modulation transformer and will change your modulation envelope.  It
> changed
>
> mine drastically when I tried this.   In fact, any non-spec load on the
> sidetone
>
> winding causes tx modulation envelope effects. It’s been a lot of years now
>
> and I don’t remember the exact details, but ended-up abandoning the
> sidetone
>
> line altogether in my sets.
>
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