Re: [Hamlib-developer] IC7300 output power

[<gm...@bt...>]

Right, I can see the issue:


  1.
The IC-7300 PO meter display %age of maximum power. So 50% max power is displayed as 50%.
  2.
The CI-V returns PO meter reading.
  3.
Both Hamlib and Flrig convert this value to Watts using similar look-up tables. Basically they both follow the display on the rig.
  4.
So for 50% max power gets displayed as 50 W, rather than 25W.

Unfortunately I don't have an RF Power meter that covers 70 MHz. My 144/432 meter reads 8W at 50% max power on 70 MHz.

Interesting asides:

The code for IC-9700 (IIRC in icom.c) divides the calculated power by 10 for the 10 GHz.
The IC-705 when operating on battery (max power = 5W) displays 100% max power, but only returns 50% on CI-V, so both Hamlib and Flrig. Obviously the CAT software doesn't know it's running on battery, so it makes sense for the Icom to handle that change.

I can implement similar code for IC-7300 on 70 MHz that is there for IC-9700 on 10 GHz.

I've not tested AM.

Phil GM3ZZA.


________________________________
From: gm...@bt... <gm...@bt...>
Sent: 29 May 2025 2:04 PM
To: Nate Bargmann <n0...@n0...>; ham...@li... <ham...@li...>
Subject: Re: [Hamlib-developer] IC7300 output power

Hi Nate,

I can have a look at this. I've got a European model IC-7300 which has 4 metres. I can't do this remotely as I have no way of keying the rig using hamlib. So I'll see if I can get some time in the shack later today.

My usual means of keying the rig when remote is flrig and that appears to give the correct power (just over 20 W on 50% drive).

73
________________________________
From: Nate Bargmann <n0...@n0...>
Sent: 29 May 2025 1:35 PM
To: ham...@li... <ham...@li...>
Subject: Re: [Hamlib-developer] IC7300 output power

* On 2025 29 May 05:20 -0500, Sakari Nylund wrote:
> Opps!
>
> Forgot to mention:  rigctld Hamlib 4.7~git 2025-03-12T17:49:17Z SHA=f8740d
> 64-bit

That's rather old, but the code in question appears to have been in
place since February 2021:

https://github.com/Hamlib/Hamlib/commit/660fd9496263abe5a663dae7496a6efee3a002ed

I'll have to leave it to an Icom expert to figure out why 4m is off.

73, Nate

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