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Would be interesting to try sine wave vs square wave. But I doubt you will notice much difference, Assuming you have a low pass (or band pass) filter on the RF input, the harmonics in a square wave

There was some comment in the webpage about the signal being a square wave. If this shows up in the signal, causing harmonics, then included in the amp should be a "smoothing" circuit or some way to

bob, i have used it as a local oscillator. but there is a catch The primary purpose of the RF out was to be able to measure the frequency response by feeding the RF out into the device/circuit under

After rereading the specifications for the Antuino and its oscillator stability, I suddenly wondered if the oscillator can be used for the oscillator in a Direct Conversion receiver... Perhaps there

Good news. Thanks. That's a clincher for me. Bob — KK5R

My Antuino came fully assembled in the enclosure shown.? The screen may be different depending on the version of software that is now being supplied by HF Signals 73 Evan AC9TU

I am preparing to order the Antuino. I wonder if it comes as shown in the image on the web page (in a box) or does it come as shown in the Calibration section... I'm hoping it comes as shown below OR

Thanks Evan, I’ll look into that -- 73 Mick VA3EPM

I had this issue with all of my uBITX.? It started as very bad RF feedback, that I was able to reduce through proper grounding.? I traced it to RF getting into the shack on the coax shield.?

I’m recently hearing my mic in my headphones during transmit. All my reports indicate a good audio reception from others So it doesn’t seem to affect my transmit audio. Has anyone experienced

Sure seems to me that it would be a lot easier to make several littler boards to provide better shield ing between stages. Put the amplifier off by itself as a module. Try to deal with the

Fritzing is apparently easy for a beginner to get started, but limited. For example, a max of 2 layers.? It does create gerbers. If you prefer a standard C tool chain over the Arduino IDE, you may

I use Express pcb and Robot room copper connection to convert the file to Gerbers. True express PCB and RRCC do not have all the bells and whistles but simplicity is its key. You can print the image

Fritziing, and the whole GEDA series are all free. _._

Re. Yes the advantage with UV is that you can make a precision PCB . The problem is that to find the right exposure and bathing time in the perchlorure. I missed several PCB like that. So I tried the

I do make my own PCB's at home. My setup is as follows. I am using EagleCad (the professional) version and draw the circuit diagram with EagleCad. Open the auto router and place the components as I

I get my boards back in seven days to my front doorstep from China. Three or four times already.

Altium is a well respected tool. If I had an employer spending $10k to buy Altium (or spend $325/month to rent it), I'd probably use it at home for hobby projects too. But I'm retired, and spending

Hello, If it is a homebrew building, may you put some pictures. I like to see personal achievements. cdt

Farhan etc i know of a group of desingers and fabricators who have used this very intensely professionally and for ho ( https://www.altium.com/ ) me construction alike https://www.altium.com/ 73 Andy