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Yes. Ideally remove the existing solder (solder sucker?) and then fill those holes all the way down to the pins on the physical connector. 73, Willie N1JBJ

I was inspecting my board set before beginning assembly. This is my USB-C connector. I can see there is a little bit of solder in just about every hole, but should I be touching these up? Seems a

Hi, what I think it would further improve the functionality is: - an AGC ( fast or medium one) for the CW?reception (already mentioned elsewhere), - if?the volume control would followed a

Hi Kees Remember also that we do test the USB connection of all boards here before shipping. The recommendation to add a bit more solder is more about long life. Since it doesn't intuitively look

Got it.? Thanks.? Wasn't aware the inputs worked like that.

After my QDX's finals bit the dust due to the remote ATU doing a re-tune cycle during transmit, I added some simple VSWR protection devices like shown. These devices are just something I had in my

Hans, I posted this screenshot back in March, no-one has responded with their own close-in spectrum. The picture shows the effect of removing the PPS. I did try at least two ways of powering the

From formula X = (14,050500 X 27,004,000) / 14,052,400 = 27,000,349 (Freq displayed / Frequency measured) = (X / Current Reference Frequency setting) If the result is that you are even further away

Hi Glenn. I've built and/or repaired several of the 40 meter QCX variants and have not seen one take more or less than the prescribed number of turns on the large winding of T1. You should be fine

No stress Hans, 100% understood re your todo list ? 73

Oops, never mind, I can't read.? Didn't notice that there are both SMD and axial 47uH ones. -- Cheers, Chuck

While working on my intended LPFs I've also looked briefly at an LPF for 80m & 60m. A quick linear simulation using QUCS shows that close to 20dB attenuation at 7MHz might be possible for 0.6dB

If this is the one you need? -- Cheers, Chuck

I asked GPT4 and it gave me a complete code segment written in C using the Hilbert transform, which creates a 90° phase shift and mixes it with original signal. I'm not a C expert so can't say how

Phil, The output of D103 should be "approximately" 3.3V (that's not a minus sign) and 2.426V is way on the low side. Grounding the LIN_REG_EN pin and turning the 78M33 OFF is good. Does it stay OFF

Ron, I failed to ask in the last post... how did you derive that value to set?

Presumably when ssb is implemented other modes like psk31. and the like will become available?? or am I on the wrong track? . Paul DJ0CU G4ADF

This might give some idea: https://github.com/threeme3/usdx It is already done. 73 Barb WB2CBA

Pretty sure the idea is to use an EER (envelope elimination and restoration) technique similar to what Guido PE1NNZ implemented on his QCX modification and later (tr)uSDX. There's a big thread here

I know it's not implemented yet, and it's unknown if it ever will be, and I have very little interest in SSB anyway, but I can't help to wonder. What is the original idea? There's a synthesizer