Re: Thetis : Fwd Pwr shows 0 always on HL2 w/HR50+ amp

[Mathew Quaife]

Are you trying to see the 100 watts on Thetis?   The only power that Thetis will report is what is coming from the Hermes.   The power from the amp is after thetis so it will not see it.  As I mentioned before, the external power meter/swr will give you the true power readings. 

Mathew

On Fri, May 8, 2026 at 8:03 AM Jim Basu <jimb...@gmail.com> wrote:

Thetis always reports 0W Forward Power (instead of 100W as an example)

for any band on any mode.

Hardware Setup:

100W Dummy Load

Thetis v2.10.3.13 (MI0BOT).. this is the latest released stable version

Radio is HL2 and external amplifier is Hardrock 50+ w/ATU (100W)

Test Example: Band: 40m, Mode: CW-L, MOX: On, Using Iambic Key

I have tried such tests on FM or SSB etc. using microphone/headset

Also tried all other bands and applicable modes.

Software Setup:

Thetis PA settings

PA Gain for 40m I have set to 43 

I started with 100 and ended up at 43, for a Drive value at 0dB, I get 100W as seen on an external Power Meter

I have tried to change Offset in the PA Gain tab and FwdPwr is still 0

I have tried changing 10W meter trim under Watt Meter tab and FwdPwr is still 0

Is there any way to play with these settings so that FwdPwr will show a realistic number (even if not accurate) ? For example i have detailed calibration of Output Power from HL2 vs Output Power from the amplifier, for each band. It would be great to share this into Thetis.

I have searched about this topic a lot and see Thetis reports the FwdPwr properly for Anan radios. But i am using HL2. 

Please share your ideas.

thank you

jim

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[Larry KC6WOG]

For anybody who has a power/swr meter that streams data over a serial port, it's a fairly simple matter to convert that data to UDP packets that can be read by a custom meter or gadget in Thetis. I created scripts that run as background services to do just that for my LP-100A and GD-102 meters. It's particularly nice for remote operation, to have everything display on your screen.

[Jim Basu]

Thank you, please share the example scripts

[Larry KC6WOG]

Basically, you just fill in the configuration block with the details of your setup and run the script. I use NSSM to run them as system services on bootup.

[Jim Basu]

This is great! Thank you Larry

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[Larry KC6WOG]

You're welcome, I hope you find them useful. I got the idea from OE3IDE's excellent bridge app but wanted just the UDP/Thetis functionality in a lightweight form without the freestanding meter. Then I looked at my GM-102 (excellent kit produced by Don, WA4MCM) and figured it's be easy to do the same for it. I can't write powerful apps the way Ernst does or design brilliant kits like Don, but at least I can contribute something!