I'm a new SunSDR2 DX owner, with the new AAT-100 tuner. I originally set up the radio and tuner and did RX just fine. However in TX (20-25W drive, 20W Tune), the SWR meter shows no power out and 1:! SWR (doesn't move) on all bands. I have a G5RV (10-40M) that is non-resonant, so this should not be. I bought a new Daiwa SWR Meter and put it between the radio and tuner and no meter movement when transmitting.

I re-configured to have the radio connected to my Z100 Plus LDG tuner and then the antenna. The tuner got power and successfully tuned 20M.

For what it's worth, I did set up VAC and COM ports to HRD and called CQ on PSK. Had a guy come right back to me, but lost him in the noise. So, I'm getting power out, but unless the new Daiwa meter is DOA, why can't I see it?

Any ideas on what I'm doing wrong or next steps on troubleshooting?

Thanks for the help.
Tim K6ACF

check your antenna port are you using the correct one?

Thanks for the reply. Yes, I was set up for A2 and the antenna was connected to A2. I switched to A3 and changed the settings in the software and get the same result. I've taken all outboard meters, tuners out of the chain and i am just transmitting directly to the antenna. I replaced the UHF/SO-239 adapter cable with another cable. Same result, no Power out indicated.

See attached screenshot testing with A3 port. Same result with A2 port.

73,
Tim K6ACF

By chance:

Are these external meters PEAK READING METERS? and if so do you have power connected to them?
NON Peak reading meters wont give you a true reading of voice power-

Still trying to figure out how to add the attachment.


I've re-inserted the attachment and it shows, we'll see if it shows up.

The external meter is out of the chain right now. But, it does both peak and average. I do have power to the meter, but I think it's just for the backlight LED. When connected to my FT-950 radio, it did show power out and SWR. Connected to the Sun, no needle movement.

Re-sized image

Tim,
Move the drive slider all the way up.

OK, some progress.

I put the external SWR meter and external LDG tuner back in line. I am set up again for A2 antenna port. I put the drive slider all the way to 100%. When I key the mic in AM mode for the tuner, I see 50W on the ExpertSDR meters and the external Daiwa SWR meter. The LDG tuner successfully tuned for my 20M signal. I switch back to SSB mode and key the mic... still no power readings on the ExpertSDR meters, nor the external Daiwa SWR meter.

Is there another setting I'm missing or misunderstanding on my part about SSB power?

Yes as your respondent suggests but also I see you are in SSB mode on MIC 1. If you only pressed MOX you need to be in a constant carrier mode such as NFM or AM. If you keyed a microphone on MIC 1 and were modulating the carrier it has to be electret.

Also note that Tune at a slider setting of circa 16% or less can result in no power out on some systems. Try Tune at 50%.

I was keying Mic2 (a TENQ MH-31A8J MIC Speaker for YAESU) on AM to transmit the carrier.



Where did you see that SSB mode is on MIC 1?

Thanks, Tim

Are you using the "TUNE" function?

There are two drivers - the DRIVE affects power of transmission of regular channels, the TUNE section drives the "TONE" functionality.

And it seems like it isn't linear (i am a new user as well) - setting it to 25% won't get you 25 watt on the display.

Anyways, the TUNE affects the tune key (i.e the tone it generates), so pull it up to 100% or at leat 50% or higher and that should gie youa power reading.

On your other question on SSB - i don't yet use a mic since i just use my gaming headset on my computer. There ia. nice video done by Vasily on how to set up transmit.

You can do the following:

Set DRive to 0% so you're not transmitting out. Hit MONITOR enable. KEY your mic, do you hear anything? If not, your miic sin't set up correctly.

There is mic1, mic2 nad PC mic (sound card). Mic 2 -- you can onlyl use Yaesu type of mic, ICOM WILL NOT WORK (not the same type for the RJ45 interface) for mic 2.

And as far power goes, on SSB you. will need to tune your voice up with compression/clppnig in order to get maximum power.

The drive and Tune are not liner- they were never intended to be linear there only a reference
and as an example i present the following:

If my drive level is set at 50 %

if I key in AM mode ( just a key) I see roughly 4 watts



remember AM mode carrier is down roughly 4 times the modulated signal this is wear you'll hear guys says 100,125-130 or so percent modulated a 25 watt carrier is usually around 100 watts modulated but again if you toss in 110/120/130 or so the carrier point versus modulated peaks are again not a linear thing

If I go back to SSB at 50 % drive and 50 % Tune I can modulate a peak of around 18 watts sometimes 20 watts

If I click the TUNE in EESDR with the rig in SSB and the Tune set at 50% again I see roughly the 18 watts-

remember the sliders ARE NOT LINEAR-
20 on the Siler does not mean 20 watts 50 on slider doesn't mean 50 watts and if in AM it will show even less as it takes into account the 1/4 peak modulated signal for your carrier
Also as a side note if I put drive at a 100% in AM that gives me roughly 45 watts of carrier at that point a modulated signal for me is around 123 watts and FLAT TOPS

hopefully above makes sense-

TimK6ACF wrote:
an UNMODUALTED SSB signal would NOT PRODUCE ANY POWER OUT SSB doesn't have a carrier

moving replay to the post made regarding were did you see I was in SSB mode