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What is your I.F. frequency? I'm curious because I have a similar superhet receiver using the HYCAS board and an 8 MHz I.F. I'm currently using a Si5351a for both L.O. and BFO. It sounds pretty good

You can download the STL file from the Soldersmoke discord server : https://discord.com/channels/1326289906603135116/1338916298549104734/1338932560822276176 Or when you up to it, you could build a

Chuck, Thanks for lighting the fire under my rear. I have my Raspberry Pi Pico based jig working now, after a couple days of struggling with programming. Hardware design and soldering was the easy

What's your receive mixer? Tks Jerry KI4IO

I looked forward to Doug Demaw’s articles. I built a two band version of the progressive communications receiver from about 1981. I remember how impressed I was that the direct conversion part

Alas, I yearn for the [late] 70s when I semi-accidentally subscribed to Wayne Green's 73 Magazine. From 1977 through the early 80s, each magazine was chock full of projects, tech articles, and general

Here's my latest rig (see pic below). It is a 10 Watt PEP single conversion transceiver using 6 printed circuit boards in a copper clad PCB enclosure. I've been having a lot of fun talking to my

That's from the time when there was a variety of different radio and electronics publications, all containing plenty of construction articles. You could walk into the magazine section of any good

That's interesting Nick. He even acknowledges the small amount of extra capacitance that this technique introduces, between the pads and the board. Dave AA7EE

For the folks who built the soldersmoke dc receiver, which pto coil form did you print? I have some cycles on a nice 3d printer so I'd like to make one. Thanks! 73 Mike M Ku4qo >

I went down the alternate road a while back and found QucsStudio (uSimmics). https://qucsstudio.de/ The neat part is the tunable parameters section, change your L&C's on the fly with the sliders and

I think I mentioned in the video that the Mac and the Windows version of LTspice are very different when it comes to the user interface. I am a Mac user as well, but I miss some of the features that

I thought of this thread when I found something in my notes headed "Birth of Manhattan Style?". It was in reference to a QST article of May? 1972 called "Some 2-meter solid-state RF power amplifier

Wow, great issue. I was going to try to track down that legendary keyer but you saved me the trouble. I'd recently been researching early keyer designs while I was engaged in my Accu-Keyer project,

Tumbling down the digi-key internet rabbit hole - I came across the April 1968 edition of QST which featured the digi-key keyer.?

Digi-Key's first product was a digitial CW keyer: https://www.digikey.com/en/resources/ham-radio/ham-radio.

Karl, Thanks for sharing you video. I looked at Spice many years ago and found it too confusing. Your video inspired me to take another look, so I downloaded the LT to my Mac. When I started and

Nick, The problems I was having were, as I mentioned, getting LT Spice to "properly" display/plotting of a filter. Ironically,? the video that Karl made directly addressed the LPF I was working on.

Gang, 1.? First of all you are going to need something like the following RF probe to measure the output of the f_T tester we have been discussing in previous posts. There are a lot of RF probes

Gang, The QRPBuilder magnetically attached Iambic and Single lever Paddles are now back in stock. Also, this will be our fifth year at the Dayton FDIM vendor night on Thursday May 15, with all our