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Got through the build, added the firmware, booted up the rig.? Now to fit the case on!? This has turned into the most difficult part of the build.? The tongue and grove are off by a very small

Generally... video/RF amplifiers are measured the same. Power output (undistorted and t 1db comprssion) Power gain (also votlage gain) Distortion IMD, IP3, harmonics Noise, noise figure of the

Yes, I did.? Perhaps my surmise above was incorrect. As I said before, I'm reluctant to butcher the radio when it operates perfectly well on 20m through 12m so far as power out is concerned -- and I

William, I count 20 turns on both of the toroid pictures.? The difference is on the 14th turn.? I count 15 turns to what should be the 14th turn and then only 2 turns between 17 and 20 on the

Evan, Thank you for your reply. I went back to carefully review my work as well as LY2H's video covering this subject.. https://www.youtube.com/watch?v=X_Oz8N7yu2g&ab_channel=LY2HHamRadioVan After

Borrowed a tinySA Ultra and a 40dB attenuator from a friend today, and got good results using that and 10dB of attenuation inside the tinySA.? All harmonics in the radio's output are in compliance

thanks will do! as twisted as it sounds,? I am looking forward to trouble shooting this as my trouble shooting abilities are not what they used to be.? It will be great to exercise them again after

Unless you have a specific reason to turn on the LNA, leave it off.? It will reduce the upper limit of the dynamic range of your instrument at the same time that it increases sensitivity.? Always

That is approximately -25dBm total power into the tinySA mixer ; and gain/loss before the mixer, whether internal or external, will need to be accounted for.? -25dBm is not a hard and fast number and

Yes he does. You clearly didn't bother reading his non US callsign which is quite clearly written at the end of his post. HINT - next time try reading the UK regs instead, there are no

The Backlight only need '12v' power applied to come on. Most of the set runs on 5v via a regulator - but not the final few Audio OP amps which will generate some hiss.. Perhaps you ruined the first

Next you should probably check for continuity on all pins between IC2 and the LCD. Those are : IC2 LCD 2 11 3 12 4 13 5 14 6 6 27

Tiny SA also has a 20db LNA. If you accidentally leave it it on then you'd exceed the input spec, so -25dbm should be your final target just in case. -- - 73 de Andy -

Questions / statements on this design. First one is how the? drafter of the schematic - not the original designer came to? his Av? results For instance the? input transformer has a voltage gain

Hi William, The RF sweeps combine the LPF and the BPF (L12 and one of the selected capacitors).? The most impact is from the BPF.? If the LPF is correctly built, it will be significantly above the

Thanks to Jeff, W1NC for the great job repairing my builds of both kits.? I didn't believe the quick turnaround and how reasonable the cost was.? He will even throw in a tactful appraisal of your

OK, there is more to this story.? This was a functioning QCX,? but it had firmware version 1.00g.? I in my infinite wisdom decided to upgrade the firmware my self rather than just buy the

Hi! Apologies for inexperience and eye sight too bad to read all these messages... Brainstorms-- 1. Optocoupler with a long USB cable? [image.png] 2. Smoke alarm? <grin> 73 Paul KY4XJ

I am researching a low-power-on-one-band symptom on my High Band QDX, Succinctly, the power out was measured into a dummy load via a WM-2 and the rig was powered with a 5AH SLA bucked down to 12.0

Hi, yesterday I ordered a keyer kit from HamGadgets. They actually had reasonable shipping, $17 compared to $30 to send only the chips. Everything seems to be included in the kit and it should