Power adjustment on the TS-440S

[Gerry Feeney]

I also had a TS440S. I agree you cannot vary the SSB output power
on a TS440S except by controling the ALC voltage at the back of the
radio. I built myself a little box for controling the ALC when I
still had the 440, used it for QRP on HF.
The mic gain is a very unreliable and non-linear way of controlling
the 'rf' power. It is not meant for that. Try using the mic gain
when driving a 10mW transverter !
I went thru this whole story years ago - don't waste time with the
mic gain control.
I now have a ts690s: kenwood decided to implement a rf output
control on it, it works wonderful. Why have they decided to do it ?
Make up your own mind.
73 Danie zs6awk

[Gerry Feeney]

Hi Danie….
Just came across your post via Google search….
I’m keying my Acom 1010 via the 7 pin remote connector on the rear panel of mt TS-440S however, even with the drive reduced as far as possible (10 - 15W) I’m getting a “G1” LED Illuminating. The ACOM manual that this indicates “a grid overload condition exists… reduce the drive power for safe operation”. Could you advise how this can be achieved ? I’m a newly licensed HAM on a rather steep learning curve 73 Gerry ☘️

I also had a TS440S. I agree you cannot vary the SSB output power
on a TS440S except by controling the ALC voltage at the back of the
radio. I built myself a little box for controling the ALC when I
still had the 440, used it for QRP on HF.
The mic gain is a very unreliable and non-linear way of controlling
the 'rf' power. It is not meant for that. Try using the mic gain
when driving a 10mW transverter !
I went thru this whole story years ago - don't waste time with the
mic gain control.
I now have a ts690s: kenwood decided to implement a rf output
control on it, it works wonderful. Why have they decided to do it ?
Make up your own mind.
73 Danie zs6awk

[Allodoxaphobia]

Post by Gerry Feeney

I also had a TS440S. I agree you cannot vary the SSB output power
on a TS440S except by controling the ALC voltage at the back of the
radio. I built myself a little box for controling the ALC when I
still had the 440, used it for QRP on HF.
The mic gain is a very unreliable and non-linear way of controlling
the 'rf' power. It is not meant for that. Try using the mic gain
when driving a 10mW transverter !
I went thru this whole story years ago - don't waste time with the
mic gain control.
I now have a ts690s: kenwood decided to implement a rf output
control on it, it works wonderful. Why have they decided to do it ?
Make up your own mind.
73 Danie zs6awk

Hi Danie….
Just came across your post via Google search….
I’m keying my Acom 1010 via the 7 pin remote connector on the rear
panel of mt TS-440S however, even with the drive reduced as far as
possible (10 - 15W) I’m getting a “G1” LED Illuminating. The ACOM
manual that this indicates “a grid overload condition exists… reduce
the drive power for safe operation”. Could you advise how this can be
achieved ? I’m a newly licensed HAM on a rather steep learning curve
73 Gerry ☘️

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