Re: [Hamlib-developer] IC7300 output power

[Sakari N. <sak...@ni...>]

That looks good, but I wonder how you get only 25W rigctld reading on 
70Mhz/CW and almost the same with emergency mode?


My SX-1000 shows 55W out with ~1.5W reflected when using normal mode an 
my home made dummy load.

Switching emergency tuner mode 70MHz/CW shows 30W out with ~0.9W 
reflected with same dummy load.


SX-1000 should go from 1.8 to 160MHz with selected connectors. There are 
another connectors for UHF 430 to 1300MHz not used now.

I think it is not accurate, but "quite close enough" meter.


Current drain shows 12A for "normal" mode 70MHz/CW carrier, so ~144Watts 
DC input should produce at least the measured 55W RF output using CW.

Curious to see Hamlib readings here after the PR is in use.

-- 
Saku
OH1KH

gm3zza--- via Hamlib-developer kirjoitti 30.5.2025 klo 17.44:
> Guys,
>
> Just tested now with CW and AM on 28 MHz and 70 MHz: emergency mode 
> and not.
>
>
> Normal Mode
> Band
> 	
> Mode
> 	
> Drive
> 	
> Internal Meter
> 	
> External Meter
> 	
> Hamlib
> 28 MHz
> 	
> AM
> 	
> 100%
> 	
> ~25%
> 	
> 24W
> 	
> 22W
>
> 	
> CW
> 	
> 100%
> 	
> 95%
> 	
> 79W
> 	
> 94W
> 70 MHz
> 	
> AM
> 	
> 100%
> 	
> 25%
> 	
> N/A
> 	
> 9.6W
>
> 	
> CW
> 	
> 100%
> 	
> 95%
> 	
> N/A
> 	
> 25W
>
>
> Emergency Mode
> Band
> 	
> Mode
> 	
> Drive
> 	
> Internal Meter
> 	
> External Meter
> 	
> Hamlib
> 28 MHz
> 	
> AM
> 	
> 100%
> 	
> 25%
> 	
> 13W
> 	
> 12W
>
> 	
> CW
> 	
> 100%
> 	
> 50%
> 	
> 51W
> 	
> 46W
> 70 MHz
> 	
> AM
> 	
> 100%
> 	
> 15%
> 	
> N/A
> 	
> 5W
>
> 	
> CW
> 	
> 100%
> 	
> 50%
> 	
> N/A
> 	
> 23W
>
>
> Notes: External meter: MFJ-993C so does not read for 70 MHz
>
> So basically with my patch hamlib is now providing the user with 
> figures in the right ball park. At the lower power ratings there is a 
> non-linearity between the internal meter provided by IC-7300 and to 
> get a more accurate translation would need using different LUTs for 
> Emergency/Normal and AM/non-AM, which I reckon would be a non-starter.
>
> I will see if I can generate a pull request (I've never done one 
> before!). If not I'll repost the patch file here.
>
> 73 Phil GM3ZZA
>
> ------------------------------------------------------------------------
> *From:* Nate Bargmann <n0...@n0...>
> *Sent:* 30 May 2025 2:36 AM
> *To:* ham...@li... 
> <ham...@li...>
> *Subject:* Re: [Hamlib-developer] IC7300 output power
> * On 2025 29 May 10:48 -0500, gm3zza--- via Hamlib-developer wrote:
> > PS. I applied that patch to the pull I took this morning.
>
> I must have missed the patch.
>
> When you all get it tested either post it here or create a PR on GitHub.
>
> 73, Nate
>
> -- 
> "The optimist proclaims that we live in the best of all
> possible worlds.  The pessimist fears this is true."
> Web: https://www.n0nb.us
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>
>
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