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I am having similar problems with my build. I checked T507 before building and it was OK, my concern is if the enamel melted in the winding section as I had to apply a bit of heat when soldering the

Thank you. I wound the output transformer the same way (RWTS) and believe I got everything nice and tight. quick update: I measured output power with a shorter jumper cable to my meter, and

Hi All, I Finally solved also the issue about the right encoder. After carefully checking the MPU with a microscope I found that the solder of this part on the main board was defective, especially

Hi Juan - No, they are different. The left QCX encoder is analog and can't pushbutton The QMX are both rotary encoders and can pushbutton down: Sandy KB3EOF

I got tired of worrying about power ratings of attenuators and accidentally putting too much power into a device so I built one of these: https://youtu.be/byF1FLdbUiA?si=Cf1gfyl1EbRiH71m (

Alan, Yes I always try bothe the m328 and m328p versions of whatever trial I'm running - with different feedback but the same error except for the device id it's looking for. I'd like to know how to

That one should work, though I would connect the first one in a series to get 50dB of attenuation (37dBm-50dB = -13dBm).? This is under the maximum that the TinySA Ultra can handle but still not

Local HRO didn't have it so going to order another attenuator online. Looking at this model:

Hello all, I hope you are very well. The QMX volume encoder is same what the of QCX? Thank you!! 73, Juan LU9CYV

No firmware. initial current is 0 mA. push power on and the current goes to 5.73 mA. Bob K2QPN

From a little Googling it appears to me the 10 in the part number means 10dB and the 25 means 25W. You'd need much more attenuation than 10dB to avoid totally overloading the TinySA. 73 Hans

Hello Joerg In any firmware version from 1_00_009 onward, the switching regulation loop runs in the highest priority interrupt process. NOTHING can stop it. It certainly doesn't get delayed by any

The attenuator does have an 'in' marked on one end and an 'out' marked on the other. Photo below:

Just realized that replies here are not in-line and get stacked on the end. Sorry for the concurrent messages. I did run the self-test on Tiny SA Ultra (all passed). Last night I also updated the

Did you run the self-test? I am sorry for my misinterpretation of the Harm message.? I would still do the self-test. Looking at your picture again, two points come to mind: 1 - Are there male and

I'll go shop for another attenuator and retest. This one came with the Tiny SA from Amazon and I can't find much about it online. Will visit HRO later.

The green 'HARM' text on the left of the display in the screenshot actually appears on my Tiny SA when the unit is placed in harmonics testing mode: Menu>Measure>Harmonics. You then input the

I haven't been able to find much about it. The attenuator came with the Tiny SA Ultra from Amazon as an optional accessory. It just indicates that it's 25W. I can run to HRO nearby later and grab

Thanks Evan. It is a Rev 2 PCB (QMX 20 to 10m) and I have added the 1N4148 as suggested by Hans. -- 73, Rick VE7TK Website: https://www.ve7tk.ca/ ( https://www.ve7tk.ca )

? thanks JZ! This weekend I will see if I can get the QMX to work on FT8 TX.